RAID Data Recovery for RAID 0, 1, 5, 6, 10, and 60 Arrays
We recover failed arrays with an image-first workflow: member-by-member imaging, offline reconstruction, and recovery from the clone. Free evaluation. No data, no recovery fee.
Per-member imaging runs $250 to $900 per drive, plus a $400-$800 array reconstruction fee. If we recover nothing, we don't charge a recovery fee. See the full pricing breakdown.
Nationwide mail-in intake, all work performed in-house at the Austin, TX lab. Inbound evaluation is free with no diagnostic fee.
“Had a raid 0 array (windows storage pool) (failed 2tb Seagate, and a working 1tb wd blue) recovered last year, it was much cheaper than the $1500 to $3500 Canadian dollars i was quoted by a Canadian data recovery service. the price while expensive was a comparatively reasonable $900USD (about $1100 CAD at the time). they had very good communication with me about the status of my recovery and were extremely professional. the drive they sent back was Very well packaged. I would 100% have a drive recovered by them again if i ever needed to again.”
“HIGHLIGHT & CONCLUSION
******Overall I'm having a good experience with this store because they have great customer services, best third party replacement parts, justify price for those replacement parts, short estimate waiting time to fix the device, 1 year warranty, and good prediction of pricing and the device life conditions whether it can fix it or not.”
“Didn't *fix* my issue but a great experience. Shipped a drive from an old NAS whose board had failed. Rossmann Repair wanted to go straight for data extraction (~$600-900). Did some research on my own and discovered the file table was Linux based and asked if they could take a look. They said that their decision still stands and would only go straight for data recovery.”
“I've been following the YouTube tutorials since my family and I were in India on business. My son spilled Geteraid on my keyboard and my computer wouldn't come on after I opened it and cleaned it, laying it upside down for a week. To make the story short I took my computer to the shop while I'm in New York on business and did charged me $45.00 for a rush assessment.”
RAID data recovery means rebuilding your failed array offline. We image each member drive, then reconstruct the stripe pattern, parity, and filesystem metadata from the clones. We never run rebuild attempts on degraded originals. All work is performed in-house at the Austin, TX lab. Supported levels: RAID 0, 1, 5, 6, 10, 50, 60.
A RAID array distributes data across multiple member drives using striping (RAID 0), mirroring (RAID 1), or parity (RAID 5/6). When one or more members fail beyond the array's tolerance, the volume becomes inaccessible.
Common triggers include degraded arrays left running until a second member fails, controller firmware corruption, accidental volume reinitialization, and NAS devices reporting "Volume Crashed" or "Storage Pool Degraded."
To recover the array we image it member by member, detect the RAID parameters (stripe size, parity rotation, member order), and reassemble it virtually from the cloned images using tools like PC-3000 Data Extractor.
Array reconstruction is software work that reads cloned images without opening any drive. If a member has mechanical damage, we do the physical work on it before we image it.
Process
How Do We Recover Data from a Failed RAID Array?
We recover RAID arrays using a six-step image-first workflow: document the configuration, clone each member with PC-3000 and DeepSpar imaging hardware, capture RAID metadata, reconstruct the array offline from cloned images, extract files, and deliver verified data.
Free evaluation and diagnostic: Document NAS model, RAID level, member count, encryption status, and any prior rebuild or repair attempts. No experiments run on original drives.
Member drive imaging: Clone each member drive on PC-3000 or DeepSpar imaging hardware, reading by head map where needed. Transplant donor parts into members with mechanical failures before imaging begins.
Metadata capture: Copy RAID headers and superblocks. Record stripe sizes, parity rotation, member offsets, and filesystem type (ZFS, Btrfs, mdadm, EXT4, XFS, NTFS).
Offline array reconstruction: Assemble the virtual array from cloned images only. Validate parity consistency and filesystem integrity across the reconstructed volume.
Filesystem extraction and recovery: Rebuild or correct the filesystem on the clone, carve fragmented files where needed, and verify priority data such as shared folders, virtual machines, and databases.
Delivery: Copy recovered data to your target media and verify file integrity with you.
Typical timing: turnaround follows the physical condition of each member drive. Mechanical member work and donor sourcing add time.
Which RAID Failure Symptom Matches Your Situation?
Select the symptom that best describes your situation to see what recovery involves and what it costs per member drive. Degraded array, Volume crashed, Multiple disk errors, Clicking/slow members, Accidental re-sync, and Encrypted volumes require power down and stop writes. Have keys/passwords available.
Select the symptom that matches your RAID array
Each symptom points to a different failure type, recovery method, and cost range.
Array shows degraded status (one drive failed)
Your NAS or RAID controller reports a degraded array.
What you see
Your NAS or RAID controller reports a degraded array. One member is marked as failed or missing, but the volume is still accessible.
What this means
A single member has dropped out of the array due to bad sectors, a failed read/write head, or a controller timeout. The array is running on reduced redundancy (RAID 5/6) or partial mirroring (RAID 1/10). Every additional read stresses the surviving members. If a second drive fails before a rebuild completes, the volume crosses its parity threshold and goes offline.
How we recover the data
We image the failed member using PC-3000 with conservative retry settings. If the failure is mechanical (clicking, not spinning), we perform a head swap in the clean bench before imaging. Once all members are cloned, we reconstruct the array offline from images and extract the data.
Per-member imaging cost
$250–$900
Recovery tier: File System Recovery or Firmware Repair
+ array reconstruction fee: $400–$800
Per-member imaging cost applies to each drive in the array. A 4-drive RAID 5 with one failed member requires imaging all 4 drives, not just the failed one.
Rush available: +$100. Donor drives are matching drives used for parts. Typical donor cost: $50–$150 for common drives, $200–$400 for rare or high-capacity models. We source the cheapest compatible donor available.
Volume crashed or not mounting
Your NAS says "Volume Crashed" or "Storage Pool Degraded," or the RAID volume does not appear in the operating system at all.
What you see
Your NAS says "Volume Crashed" or "Storage Pool Degraded," or the RAID volume does not appear in the operating system at all.
What this means
The array metadata (superblock, RAID header, or partition table) is corrupted or the array has exceeded its parity tolerance. On Linux-based NAS devices (Synology, QNAP), this often means mdadm or Btrfs metadata is damaged. On Windows servers with hardware RAID, the controller firmware may have lost its configuration.
How we recover the data
We image every member through write-blocked channels, capture residual RAID metadata from each disk header, and use PC-3000 Data Extractor to detect stripe size, parity rotation, and member order. The array is reconstructed virtually from cloned images without writing to any original drive.
Per-member imaging cost
$250–$900
Recovery tier: File System Recovery or Firmware Repair
+ array reconstruction fee: $400–$800
All members must be imaged regardless of which ones appear healthy. Metadata fragments on every member contribute to accurate reconstruction.
Rush available: +$100. Donor drives are matching drives used for parts. Typical donor cost: $50–$150 for common drives, $200–$400 for rare or high-capacity models. We source the cheapest compatible donor available.
Multiple drives failed simultaneously
Two or more drives failed at the same time, or within hours of each other.
What you see
Two or more drives failed at the same time, or within hours of each other. The array is completely offline.
What this means
Simultaneous multi-drive failure almost always traces back to a shared cause: a power surge that damaged TVS diodes or motor driver ICs on multiple drives, a controller firmware bug that incorrectly marked healthy members as failed, or drives from the same manufacturing batch reaching end-of-life together. The drives themselves may still contain intact data on their platters.
How we recover the data
We evaluate each failed member individually. Electrical failures (blown TVS diodes, shorted motor driver ICs) are repaired with board-level component work, restoring the drive to a readable state without opening it. Mechanical failures require head swaps. Once enough members are readable, we reconstruct the array from images.
Per-member imaging cost
$600–$1,500
Recovery tier: Firmware Repair or Head Swap
+ array reconstruction fee: $400–$800
Cost scales with how many members need physical repair. If 2 of 4 drives have blown TVS diodes and the other 2 image cleanly, you pay the repair tier only for the 2 damaged drives.
Rush available: +$100. Donor drives are matching drives used for parts. Typical donor cost: $50–$150 for common drives, $200–$400 for rare or high-capacity models. We source the cheapest compatible donor available.
Risk if you continue
Do not power-cycle drives repeatedly after a suspected power event. Each power-on attempt can worsen electrical damage or cause weakened heads to contact the platters.
RAID rebuild failed or stuck at a percentage
You replaced a failed drive and started a rebuild, but it stalled at some percentage or the controller marked the replacement as failed too.
What you see
You replaced a failed drive and started a rebuild, but it stalled at some percentage or the controller marked the replacement as failed too.
What this means
A rebuild reads every sector of every surviving member to recalculate parity for the replacement drive. If any surviving member has even a single unreadable sector, the rebuild fails at that point. The partially rebuilt replacement now contains a mix of recalculated and uninitialized stripes. The original failed drive's data is still on its platters, but the rebuild may have written partial parity data that complicates reconstruction.
How we recover the data
We image every member including the original failed drive and the partially rebuilt replacement. By comparing stripe contents across all copies, we identify which stripes completed correctly and which did not. The array is reconstructed using the best available data from each source.
Per-member imaging cost
$600–$1,500
Recovery tier: Firmware Repair or Head Swap
+ array reconstruction fee: $400–$800
Both the original failed drive and the replacement drive must be sent in. All surviving members are imaged as well.
Rush available: +$100. Donor drives are matching drives used for parts. Typical donor cost: $50–$150 for common drives, $200–$400 for rare or high-capacity models. We source the cheapest compatible donor available.
Risk if you continue
Do not restart the rebuild. Each restart attempt overwrites more original parity data with recalculated values, reducing the data available for offline reconstruction.
RAID controller error or card failure
The RAID card itself has failed, shows errors in BIOS, or the server will not POST.
What you see
The RAID card itself has failed, shows errors in BIOS, or the server will not POST. The drives may be physically fine.
What this means
Hardware RAID controllers (Dell PERC, Adaptec, LSI/Broadcom) store array configuration metadata on the drives and sometimes in NVRAM on the controller card. When the controller fails, the OS cannot access the array even though the member drives may be healthy. Replacing the controller with a different model or firmware revision can misread the original metadata and destroy the array configuration.
How we recover the data
We bypass the failed controller entirely. Each member is connected directly to PC-3000 via HBA passthrough (no RAID logic), imaged as a raw disk, and the array is reconstructed from the on-disk metadata using Data Extractor. No replacement controller is needed.
Per-member imaging cost
$250–$900
Recovery tier: File System Recovery or Firmware Repair
+ array reconstruction fee: $400–$800
Controller failures often mean all members are physically healthy, so imaging is straightforward per-member logical work. This is typically one of the less expensive RAID recovery scenarios.
Rush available: +$100. Donor drives are matching drives used for parts. Typical donor cost: $50–$150 for common drives, $200–$400 for rare or high-capacity models. We source the cheapest compatible donor available.
Accidentally reinitialized or reconfigured the array
Someone cleared a foreign configuration, created a new volume, or ran a disk initialization utility on the RAID drives.
What you see
Someone cleared a foreign configuration, created a new volume, or ran a disk initialization utility on the RAID drives.
What this means
Reinitializing a RAID volume overwrites the array metadata (superblock, DDF header, or controller config block) but does not zero the actual data regions. The user data remains in place across the member drives; only the map describing how to assemble it has been destroyed. A full low-level initialization (writing zeros to every block) is the exception and does destroy data.
How we recover the data
We image each member as a raw disk and use PC-3000 Data Extractor to auto-detect residual array parameters from file type signatures scattered across the raw data. Stripe size, rotation direction, and member order are reconstructed empirically and verified against known file structures.
Per-member imaging cost
$250–$900
Recovery tier: File System Recovery or Firmware Repair
+ array reconstruction fee: $400–$800
This is typically logical-tier work on all members. No physical repair needed unless drives were also damaged.
Rush available: +$100. Donor drives are matching drives used for parts. Typical donor cost: $50–$150 for common drives, $200–$400 for rare or high-capacity models. We source the cheapest compatible donor available.
Server won't boot, data on RAID
The server will not start up.
What you see
The server will not start up. It may be an OS issue, a motherboard failure, or an actual RAID problem. You are not sure which.
What this means
If the server hardware failed (motherboard, PSU, CPU) but the RAID array is intact, the member drives contain fully consistent data. The challenge is accessing that data without the original server's RAID controller interpreting the on-disk metadata. If the OS volume was on the RAID, a corrupted boot sector or failed OS drive can also prevent startup while leaving the data volumes intact.
How we recover the data
We pull the member drives and connect each one directly to our imaging hardware, bypassing the server entirely. If the drives are healthy, we image them as raw disks and reconstruct the array offline. If the issue was purely an OS or hardware failure, the data is typically recovered at the logical tier.
Per-member imaging cost
$100–$250
Recovery tier: Simple Copy or File System Recovery
+ array reconstruction fee: $400–$800
If the drives are healthy and the array metadata is intact, this can be among the simplest RAID recoveries. Cost depends on member count and whether any physical repair is needed.
Rush available: +$100. Donor drives are matching drives used for parts. Typical donor cost: $50–$150 for common drives, $200–$400 for rare or high-capacity models. We source the cheapest compatible donor available.
This guide covers common RAID failure patterns. A precise diagnosis requires physical evaluation of all array members at our Austin, TX lab. The evaluation is free and carries no obligation. Do not attempt RAID rebuilds on a degraded array before consulting a professional.
What Symptoms Indicate a RAID Array Needs Professional Recovery?
RAID failure symptoms range from degraded status warnings and inaccessible shared folders to clicking drives and stuck rebuilds. If the data is irreplaceable and you don't have a verified backup, do the same thing for each one: stop all write activity, power down the array, and don't force a rebuild or reinitialize the array.
Degraded array
A rebuild puts every surviving member under sustained read load. If the data is irreplaceable and you don't have a verified backup, power down and stop writes instead of forcing a rebuild.
Volume crashed / Uninitialized
Treat a crashed storage pool on a Linux-based NAS and an uninitialized array in Windows Disk Management the same way. Don't accept a prompt to format, repair, or recreate the volume. Each of those writes to the member drives.
Multiple disk errors
Avoid swapping order or repeated hot-plugs. Label drives and preserve original order.
Clicking/slow members
Do not keep power-cycling; heads may be weak. Each cycle risks surface damage.
Accidental re-sync / rebuild started
Power down to stop further writes to the member drives.
Encrypted volumes
Have keys/passwords available. We keep data offline and under chain-of-custody during work.
Important: Any write activity (rebuilds, "repairs", new shares) can overwrite recoverable data. Power down and contact us.
Rebuild warning
Why Do RAID 5 Rebuilds Fail on High-Capacity Drives?
RAID 5 rebuilds fail on high-capacity drives mostly for mechanical reasons. A full-surface parity rebuild pins every surviving member at sustained read until it finishes, and a marginal same-batch survivor often fails under that load. The Unrecoverable Read Error (URE) rate of 1 in 1014 bits is a worst-case warranty floor that raises the odds of hitting a bad sector, not a certainty.
On the bench, degraded arrays rarely die from an independent per-byte bit error. They die because the rebuild loads marginal hardware: a 4-drive array of 8 TB members reads 24 TB across aging survivors, a marginal head, preamp, or bearing crosses its failure threshold mid-rebuild, or a desktop SMR member without configurable TLER/ERC stalls for tens of seconds on a band rewrite and the controller ejects a physically healthy drive.
Members share a batch, age, and thermal environment, so a second failure inside the rebuild window is correlated, not independent.
What a single URE does when it lands is controller-specific, not a universal collapse. Legacy block-level hardware RAID and low-end consumer controllers hard-abort and drop the volume offline.
Modern Dell PERC and LSI/Broadcom MegaRAID puncture the stripe: they write a bad-block placeholder, finish the rebuild, and keep the volume online, with only the punctured stripe lost. Linux mdadm records the bad LBA in its Bad Block Log and continues; ZFS RAIDZ finishes the resilver and names the corrupted file. The data in that stripe is gone for good, but one URE does not take the whole array down.
RAID 6 carries a second parity block. A RAID 6 with one member down still has parity left to rebuild an unreadable sector on a survivor, so one URE doesn't escalate to total loss. The real danger on a RAID 6 is a second member that has already failed, which leaves zero remaining tolerance, or a correlated mechanical failure of a third same-batch drive during the rebuild window.
We image each member independently on PC-3000 & DeepSpar hardware. When we hit an unreadable sector, the imager logs it and moves on. It doesn't drop the drive from an array or trigger parity recalculation.
After all members are imaged, we reconstruct the array offline from clones. If a NAS RAID rebuild has already failed, we still image every member before any reconstruction attempt. ZFS handles parity differently using checksums and copy-on-write, but the imaging-first principle remains the same: clone before any reconstruction attempt.
Model the Capacity and Rebuild-Risk Math for Your Array
Enter your RAID level, member count, and drive size to see usable capacity, parity overhead, fault tolerance, and the worst-case probability of hitting an unreadable sector while reading the survivors during a degraded parity rebuild. The numbers carry no pricing and are not a quote. Any scenario that points toward array collapse calls for forensic array reconstruction from member images, not an in-place rebuild.
RAID Capacity & Rebuild-Risk Calculator
Capacity, fault tolerance, and parity-overhead math for a single array. The URE figure models the worst-case probability of hitting an unreadable sector while reading the survivors during a degraded parity rebuild. It carries no pricing and is not a recovery quote.
Usable capacity
24 TB
Raw 32 TB across 4 members
Parity / mirror overhead
25%
Capacity spent on redundancy
Fault tolerance
1 drive
Degraded-rebuild URE probability
85.3%
Modeled across ~24 TB of survivor reads at the 1-in-1014 consumer URE floor
The URE figure uses the 1-in-1014-bit worst-case manufacturer warranty floor for consumer drives. It is not a per-rebuild certainty: field data shows most drives read far past that floor clean. On the bench the dominant rebuild killer is correlated same-batch mechanical failure, when a marginal head, preamp, or bearing on an aging survivor crosses its threshold under the sustained read load of a full rebuild pass. Enterprise drives rated 1-in-1015 lower the per-byte risk but do not change correlated-failure exposure.
Do not rebuild a degraded array to test these numbers
A rebuild does not save money and does not prevent data loss; on a degraded parity array it is the operation most likely to cause it. Redundancy keeps a live array online, it is not a backup of the data. Any scenario above with exhausted tolerance, a degraded member, or a non-trivial URE probability calls for forensic, member-by-member imaging before any rebuild attempt. Image every member through write-blocked channels with ddrescue or Data Extractor Express RAID Edition running on the PC-3000, then reconstruct the array offline from the clones so a single bad sector is logged and skipped instead of collapsing the volume.
Degraded Array or Failed Rebuild: What Should You Do First?
A degraded array is still online but has lost redundancy. A failed rebuild means the array is offline, usually because a second member was ejected during the parity resync. The correct first action differs. Where the data is irreplaceable and there is no verified backup, a degraded array needs every surviving member imaged before anything else; where verified backups exist, a monitored rebuild is standard practice. A failed rebuild needs the stale member identified offline before reconstruction starts.
Most guides tell you to replace the failed drive right away so the array rebuilds itself back to perfect condition. On a routine failure with verified backups, that monitored rebuild is standard practice. Where the data is irreplaceable, no verified backup exists, or the members are physically degrading, the same advice loses data: each rebuild attempt re-loads every surviving member under sustained read. Which of these two states your array is in decides the right first move.
Degraded array (still online)
The array is still mounted and serving data with one member down, so it has lost redundancy, but the volume itself hasn't dropped offline yet. Where the data is irreplaceable and you have no verified backup, stop all writes to the volume, do not click rebuild or repair, and image every surviving member first; where a verified backup exists, a monitored rebuild is ordinary practice. A degraded RAID 5 rebuild pins each survivor at sustained read for many hours. That makes it more likely a second member turns up a latent unrecoverable sector under that load. The degraded RAID recovery intake path starts with imaging, never with a rebuild button.
Failed rebuild (array offline)
The resync already aborted and a second member dropped, so the volume is offline and an aborted rebuild can leave inconsistent parity behind. First we identify the stale member, the one that went offline first. We do that offline, by comparing the event count in each member's mdadm superblock across the cloned members. We read each event count with mdadm --examine /dev/sd* against the clones, then assemble read-only with mdadm --assemble --readonly, leaving the stale member out. See RAID rebuild failed for that workflow.
Both paths run as two separate stages. First we image each member on the PC-3000 Express, PC-3000 Portable III, or DeepSpar Disk Imager. The array is then reconstructed virtually in software against the read-only clones, using Data Extractor Express RAID Edition on the PC-3000 Express or mdadm --assemble --readonly, never against the live members. The imaging hardware reads the drives; the software reassembles the geometry from those images.
All of this happens in-house at our Austin, TX lab. We are a single location with no outsourcing, we charge no diagnostic fees, and the $400-$800 array reconstruction line item sits on top of per-member imaging only when the recovery succeeds. When we recover nothing, you pay no recovery fee. Member count, the failure mode of each individual member, and how layered the filesystem stack sits above the array are among the variables that move an array recovery quote.
In-place repair risk
Should You Scrub or Repair a Pool That Already Lost a Member?
Not while the data on it is irreplaceable and you don't have a verified backup. In that case, image every surviving member offline first, before any in-place repair or full-surface verification pass. If you do have a verified backup, a monitored rebuild is ordinary practice. A scrub reads every allocated block and a parity rebuild reads the full raw surface; a resilver reads only what ZFS knows to be out of date. All three put the survivors under sustained read at the one moment they carry the only copy of the data.
Latent sector errors aren't spread evenly across a drive or across time. A 2010 USENIX FAST field study of latent sector errors found that very small distances between an error and its nearest neighbor were the most common. It also found that errors close together in space were likely to be close together in time. A full-surface pass over aging same-batch survivors walks into that cluster.
The drop itself can be a timeout, not a dead drive. When a member hits a marginal sector it retries internally. Desktop drives without error recovery control can take over two minutes to give up. The Linux kernel gives up after 30 seconds. That's a default you can adjust per device in /sys/block/sdX/device/timeout. The md RAID code then assumes the drive is dead and kicks it from the array. An SMR member stalls the same way while it reshingles a band. A drive ejected this way can still be readable on a bench imager.
ZFS Scrub and Resilver Mechanics
A ZFS scrub is not an fsck-style blind metadata repair, and describing it that way gets the risk wrong. The OpenZFS zpool-scrub(8) manual says a scrub examines all data in the pool and verifies each block's checksum. On replicated vdevs, meaning mirror, raidz, or draid, ZFS automatically repairs any damage discovered during the scrub. A resilver examines only the data ZFS knows to be out of date. Because both operations are I/O-intensive, ZFS only allows one at a time.
So the hazard isn't that a scrub corrupts your metadata. The hazard is the read load it puts on members that no longer have redundancy sitting behind them. The current OpenZFS manual lists zpool scrub -p to pause a scrub and zpool scrub -s to stop one. If the pool is already reporting a faulted or removed device, stop the scrub and image the members. That preserves your options. TrueNAS and FreeNAS ZFS pool recovery covers the vdev-level reconstruction path once the members are cloned.
Destructive Repair Passes vs Read-Only Forensic Extraction
Not every repair command carries the same class of risk, and conflating them leads administrators to the wrong caution. btrfs check --repair writes to the volume in place, and the Btrfs documentation lists it under dangerous options. The forensic path leaves the filesystem alone. btrfs-find-root finds tree roots and can filter them by generation, and btrfs restore tries to salvage files from a damaged filesystem without modifying the filesystem image.
Either way the intake rule is the same: the pool or array is reconstructed in software against read-only clones of the members, with zpool import -o readonly=on or mdadm --assemble --readonly, never against the live members.
RAID repair vs recovery
What Is the Difference Between RAID Repair and RAID Data Recovery?
"RAID repair" and "RAID data recovery" describe two different operations. RAID repair is what an IT administrator does to restore hardware redundancy on a live, degraded array. RAID data recovery is what happens after repair fails, the volume crashes, and data must be extracted offline from cloned member images.
Attribute
RAID Repair
RAID Data Recovery
Goal
Restore hardware redundancy on a live, running server.
Extract files offline after the array crosses its parity threshold.
Method
In-place rebuild writing new parity to a replacement drive.
Imaging of each member, then virtual assembly from clones.
Risk to Data
A second member failure during the rebuild takes a single-parity array offline.
Reconstruction runs on clones, not on the original drives.
When to Use
Single member failure with all other members healthy and verified.
After rebuild fails, volume crashes, or multiple members are down.
When a single member drops out of a RAID 5 or RAID 6 array, the controller marks the array as degraded but continues serving data using parity calculations. An administrator can attempt a repair by replacing the failed member and triggering a rebuild. If the rebuild completes without additional failures, the array returns to a healthy state with full redundancy restored.
The problem: attempting a rebuild on an array with a second weakening member forces the controller to read every sector of every surviving drive. If another drive drops out during that process, the rebuild fails and the array crosses its parity threshold. At that point, administrative repair tools can't reconstruct the volume anymore, and getting the data back means recovering it offline from member images.
Recovery Software on Physically Failing RAID Members
Do not connect a physically failing RAID member to a consumer PC and run recovery software. If the drive has a degraded head stack assembly, a software scan reads it block by block, and that forces read retries that wear out weak heads and can score the platters. Software recovery tools assume the storage hardware is mechanically sound.
The safe way to recover is to image the drive on PC-3000 or DeepSpar hardware with conservative retry settings. PC-3000 Data Extractor reads by head map, and the DeepSpar Disk Imager processes every head differently depending on its level of degradation. Array reconstruction doesn't begin until we've safely imaged every member.
TRIM, UNMAP, and SMR Complications in RAID Arrays
SSD-based RAID arrays (NVMe or SATA SSD members in RAID 0, 5, or 10) have a recovery problem that spinning-disk arrays don't have. TRIM tells the SSD controller to unmap deleted data, and on drives that enforce a post-TRIM read mask, recovery software reads back zeros for those blocks.
Shingled Magnetic Recording (SMR) hard drives present a different problem. SMR drives write data in overlapping tracks and stage incoming writes in a CMR cache zone.
During a RAID rebuild, the sustained writes overflow the drive's CMR cache zone, and a consumer SMR drive stalls for 30 to 60 seconds. The Linux kernel reads that latency as a dead drive and ejects it.
Controller metadata
How Does Hardware RAID Controller Metadata Affect Recovery?
Hardware RAID controllers write the array geometry to the member drives, not only to the card, so the original controller is not required to reconstruct the array. Dell PERC and LSI/Broadcom MegaRAID write a variant of the SNIA Disk Data Format to the trailing sectors of each member. Adaptec writes a proprietary format to the same tail region, and HP Smart Array P-series and E-series controllers write a proprietary RAID Information Sector rather than DDF. Software RAID (Linux mdadm, Btrfs) keeps its geometry in on-disk metadata that standard Linux tools read directly.
Dell PERC / LSI Broadcom (SNIA DDF Metadata)
Dell PERC and LSI/Broadcom MegaRAID controllers write SNIA Disk Data Format (DDF) metadata to a reserved region at the end of each member drive. The DDF records describe the RAID level, stripe size, physical drive order, and parity rotation.
When the original controller fails or its firmware becomes corrupted, the array becomes inaccessible even though the data on each member is intact. We image each member and reconstruct the array offline with PC-3000 Data Extractor, without the original controller.
Adaptec Proprietary Tail Metadata
Adaptec controllers write their metadata to a reserved region at the end of each drive. That's the same tail placement as the Dell/LSI DDF convention, but the format is proprietary rather than standard SNIA DDF.
Corrupted or Missing Controller Metadata
When controller metadata is destroyed or the original hardware is unavailable, Data Extractor's auto-detection mode works out the RAID configuration from the file systems and user data on the member images.
Metadata preservation
How Does RAID Metadata Preservation Enable Virtual Array Reconstruction?
Every RAID recovery begins with the same step: we clone all member drives before we attempt any assembly. We never connect the original drives to the RAID controller or any system that could trigger a rebuild, resync, or parity recalculation. All reconstruction happens offline, on cloned images, using PC-3000 Data Extractor to virtually assemble the array.
Virtual array reconstruction: Build a virtual RAID from the cloned images with the detected RAID parameters.
Stripe size and member order: Work out stripe size and member ordering from the file system structures on the member images.
Automatic and interactive detection: Data Extractor has automatic and interactive detection modes for RAID configurations. The automatic mode analyzes file systems and user data on the images.
Virtual Array Reconstruction vs. Physical Rebuild
A physical RAID rebuild runs on the live array. Virtual reconstruction reads cloned images without writing to any drive.
PC-3000 Data Extractor builds a virtual RAID from the images with the detected RAID parameters (stripe size, parity rotation, member ordering). If the parameters are wrong, we discard the virtual assembly and test again. Parameter detection doesn't write to a drive.
Stripe Size Detection via Hex Analysis
When controller metadata is destroyed or the original controller hardware is unavailable, we determine stripe size by analyzing raw member images in a hex editor. For NTFS volumes, we search for MFT record headers across multiple member images.
ext4 volumes carry a comparable anchor. The ext4 superblock starts 1024 bytes into the filesystem, and its magic number 0xEF53 sits at offset 0x38 inside it. When we locate it across the raw images, we get the data start offset and the member holding the first chunk. That's where hex-level RAID de-striping and controller-independent reconstruction begins when no controller metadata survives.
Controller Metadata Location on Member Drives
LSI/Broadcom and Dell PERC controllers write SNIA Disk Data Format (DDF) metadata to a reserved region at the end of each member drive. Adaptec controllers also write their metadata to a reserved region at the end of each drive, but in a proprietary format rather than standard SNIA DDF.
Can Data Be Recovered from RAID Arrays with File Table Corruption or Ransomware?
File table corruption and ransomware are two different failure modes that require different recovery approaches. Non-cryptographic corruption (partition table overwrite, filesystem driver crash) damages the file system map, not the file contents. Ransomware encrypts the actual file payloads, and data recovery tools don't work against the encryption itself.
File Table Corruption Without Encryption
When the Master File Table (NTFS), ext4 superblocks, or XFS allocation group headers are destroyed by accidental reformatting, partition table overwrites, or driver-level corruption, the file system map is gone. After we image all members, we use PC-3000 Data Extractor's Raw recovery mode. ACE Lab provides that mode for recovering data when file system structures are catastrophically damaged.
For fragmented structures such as SQL databases or Exchange EDB files, Data Extractor has an Object map mode. Success depends on how fragmented the data is, and heavily fragmented files can be partially unrecoverable.
Ransomware on RAID Arrays
Ransomware encrypts the contents of user files, not just filesystem metadata. Data recovery tools can't decrypt ransomware-encrypted files. Recovery from a ransomware attack depends on whether the encryption process was interrupted before completing all files, whether offline backups survived the attack, and whether the volume-level encryption keys (BitLocker, LUKS) remain intact.
We image all members and reconstruct the array to assess which files were encrypted and which survived. Partially encrypted arrays (where the ransomware was interrupted mid-execution) can yield recoverable data from the unencrypted portions.
Accidental Formatting: Controller Initialization vs. OS-Level Format
What we can recover after an accidental format depends on how the format was run and on what was written afterward. We work from cloned array images, where PC-3000 Data Extractor's Raw recovery mode looks for files when the file system structures are gone.
An initialization run from the RAID controller is a different case. Initializing the virtual disk erases the configuration records on the member drives, and sectors the controller has zeroed aren't recoverable. If you suspect an initialization has started, power the array down.
Controller gotchas
What Are Controller-Specific RAID Recovery Traps?
Some RAID controller families have behaviors that turn a routine failure into data loss when an administrator follows the default prompts. Two of them are the foreign configuration prompts on Dell PERC and confusion over mdadm superblock versions and offsets.
Dell PERC: Foreign Configuration Import and Clear
A PERC controller can report member drives as a foreign configuration and offer to import it or clear it. Clearing a foreign configuration erases the configuration records from the member drives.
We image all members first, before anyone decides to import or clear.
Linux mdadm: Superblock Version and Offset Confusion
mdadm supports four metadata versions (0.90, 1.0, 1.1, 1.2), and each one puts the superblock at a different location. According to md(4), version 0.90 is written into a 64K-aligned block that starts at least 64K and less than 128K from the end of the device. Version 1.0 is stored between 8K and 12K from the end, on a 4K boundary.
Version 1.1 is stored at the start of the device and version 1.2 at 4K from the start. mdadm --zero-superblock overwrites a member's md superblock with zeros, and the array parameters recorded there are lost with it.
We scan for ext4 or XFS magic bytes to calculate the exact data start offset, then force assembly with the correct metadata version. For cases where superblocks are fully zeroed, we determine stripe size and member ordering from filesystem anchor points and assemble the array from images using calculated parameters.
CHKDSK and fsck on a Degraded RAID Array
CHKDSK and fsck are filesystem consistency tools, not data recovery tools. When you run CHKDSK with its repair parameters, it fixes errors on the volume, which means it writes to the volume.
We image the member drives before any filesystem-level tool touches the volume.
Lab environment
Where Does Physical RAID Member Drive Work Happen?
When an individual member needs physical work, we do the open-drive work on a 0.02 µm ULPA-filtered clean bench.
Filtration
0.02 µm ULPA-filtered clean bench. Per EN 1822/ISO 29463, the ULPA filter is rated 99.9995% efficient at its most penetrating particle size, about 0.12 µm.
Post-Repair Workflow
After mechanical repair, we connect the drive to PC-3000 or DeepSpar imaging hardware and clone it. We don't start the software-based array reconstruction on the cloned data until imaging succeeds. For RAID arrays where all members read without mechanical issues, no open-drive work is needed.
A helium member's mechanical work stays in-house: helium drive recovery with head swaps, helium refill, and platter cleaning runs on the same ULPA-filtered clean bench in Austin, and the donor head stack has to come from a matching helium model rather than an air-filled drive of the same capacity.
Board repair
How Does Board-Level Repair Increase RAID Recovery Success Rates?
Rossmann Group performs component-level logic board repair on individual RAID member drives, including fixing burned PCBs and microscopic trace restorations. That work runs in-house at our Austin, TX lab. We are a single location and we do not outsource member drive repair.
When a RAID 5 array has lost two members and one of them failed from a power surge that burned a TVS diode or motor driver circuit on the PCB, board-level repair can restore that drive to a readable state, bringing the array back within its fault tolerance.
The mechanism: when a TVS diode shorts or a motor driver IC fails, the drive becomes electrically unresponsive. The RAID controller marks it as a failed member and drops it from the array. If a second member then fails mechanically while the electrically dead drive sits offline, the array crosses its parity threshold. But the first drive's platters and heads are often undamaged; only the board-level electronics prevent it from being read.
By replacing the specific failed component at the IC level, we restore the drive's ability to communicate with imaging hardware. The platter data becomes accessible again. This reduces the actual member failure count back within the array's parity tolerance, allowing reconstruction to proceed.
We diagnose PCB-level failures using diode-mode measurements, thermal imaging, and microscope inspection. Failed components are identified and replaced at the individual IC level, not by swapping entire donor boards (which often fails due to firmware and adaptive data mismatches).
Trace damage from electrical events is repaired under microscope using micro-soldering and jumper wires. This restores signal paths between the controller, preamplifier, and motor driver without disturbing the drive's original firmware calibration data stored in ROM.
After PCB repair, we image the drive on PC-3000 hardware before it enters the array reconstruction workflow. The repair serves one purpose: making the member readable so its data can be cloned and contributed to the virtual array rebuild.
This is where Rossmann Group's board repair background directly benefits RAID recovery. The same micro-soldering skills used on MacBook logic boards apply to hard drive PCB restoration.
Pricing
How Much Does RAID Data Recovery Cost?
RAID data recovery at Rossmann Group uses a two-tiered pricing model: a per-member imaging fee for each drive in the array, plus an array reconstruction fee of $400-$800. We don't charge a recovery fee if we recover nothing. No diagnostic fees, no obligation.
Air-filled donor parts consumed during transplant. Helium-sealed members use $3,000–$4,500 head swap or $4,000–$5,000 surface damage pricing plus helium and donor costs.
Array Reconstruction
$400-$800per array
Depends on RAID level, member count, filesystem type (ZFS, Btrfs, mdadm, EXT4, XFS, NTFS), and whether parameters must be detected from raw data. PC-3000 Data Extractor performs parameter detection and virtual assembly from cloned images.
No data, no recovery fee: If we recover nothing from your array, you don't pay a recovery fee. Free evaluation, no obligation.
We are not HIPAA certified and do not sign BAAs.
Per-Member Drive Pricing Tiers
Each member drive in a RAID array is priced individually based on the failure type. A 4-drive RAID 5 where all members image normally costs From $250 per air-filled drive. If one air-filled member needs a head swap, that drive moves to $1,200–$1,500; the other three stay at the lower tier. A helium-sealed Exos, Ultrastar, or MG member needing mechanical work uses the helium HDD table instead. Whether the array parameters have to be detected from raw sectors instead of read from surviving on-disk array metadata lands on the reconstruction side of the bill rather than in these per-drive tiers. That side of the total is set by how degradation state and filesystem layering shape reconstruction labor.
Air-filled RAID member pricing
01
Low complexity
Simple Copy
Your drive works, you just need the data moved off it
Functional drive; data transfer to new media
Rush available: +$100
$100
3-5 business days
02
Low complexity
File System Recovery
Your drive isn't recognized by your computer, but it's not making unusual sounds
File system corruption. Accessible with professional recovery software but not by the OS
Starting price; final depends on complexity
From $250
2-4 weeks
03
Medium complexity
Firmware Repair
Your drive is completely inaccessible. It may be detected but shows the wrong size or won't respond
Your drive was dropped, has visible damage, or a head crash scraped the platters
Platter scoring or contamination. Requires platter cleaning and head swap
50% deposit required. Donor parts are consumed in the repair. Most difficult recovery type.
50% deposit required
$2,000
4-8 weeks
Hardware Repair vs. Software Locks
Our "no data, no fee" policy applies to hardware recovery. We do not bill for unsuccessful physical repairs. If we replace a hard drive read/write head assembly or repair a liquid-damaged logic board to a bootable state, the hardware repair is complete and standard rates apply. If data remains inaccessible due to user-configured software locks, a forgotten passcode, or a remote wipe command, the physical repair is still billable. We cannot bypass user encryption or activation locks.
No data, no fee. Free evaluation and firm quote before any paid work. Full guarantee details. Head swap and surface damage require a 50% deposit because donor parts are consumed in the attempt.
Rush fee
+$100 rush fee to move to the front of the queue
Donor drives
Donor drives are matching drives used for parts. Typical donor cost: $50–$150 for common drives, $200–$400 for rare or high-capacity models. We source the cheapest compatible donor available.
Target drive
The destination drive we copy recovered data onto. You can supply your own, or we'll provide one. For larger capacities (8TB, 10TB, 16TB and above), target drives cost $400+ extra. All prices are plus applicable tax.
Sealed helium drives are on their own price list, $200–$5,000+. When a head swap or platter repair opens one, we refill it with helium. That adds $400–$800, and the donor has to be an exact match. Helium drive prices
Helium-sealed RAID member pricing
01
Low complexity
Simple Copy
Your helium drive works, you just need the data moved off it
Functional drive; data transfer to new media
Rush available: +$100
$200
3-5 business days
02
Low complexity
File System Recovery
Your helium drive isn't recognized by your computer, but it's not making unusual sounds
File system corruption. Accessible with professional recovery software but not by the OS
Starting price; final depends on complexity
From $600
2-4 weeks
03
Medium complexity
Most Common
Firmware Repair
Your helium drive is completely inaccessible. It may be detected but shows the wrong size or won't respond
Your helium drive was dropped, has visible damage, or a head crash scraped the platters
Platter scoring or contamination. Requires platter cleaning, head swap, and helium refill
50% deposit required. Helium cost ($400-$800) and donor drive cost additional. Most difficult recovery type.
50% deposit required
$4,000–$5,000
4-8 weeks
Hardware Repair vs. Software Locks
Our "no data, no fee" policy applies to hardware recovery. We do not bill for unsuccessful physical repairs. If we replace a hard drive read/write head assembly or repair a liquid-damaged logic board to a bootable state, the hardware repair is complete and standard rates apply. If data remains inaccessible due to user-configured software locks, a forgotten passcode, or a remote wipe command, the physical repair is still billable. We cannot bypass user encryption or activation locks.
No data, no fee. Free evaluation and firm quote before any paid work. Full guarantee details. Head swap and surface damage require a 50% deposit because donor parts and helium are consumed in the attempt.
Rush fee
+$100 rush fee to move to the front of the queue
Helium cost
Helium cost: $400-$800 additional for head swap and surface damage tiers. This covers the helium refill required after opening the sealed chamber.
Donor drives
Helium donor drives must be an exact match. Typical donor cost: $200–$600 depending on model and availability, plus helium refill cost ($400–$800) required after opening the sealed chamber.
Target drive
The destination drive we copy recovered data onto. You can supply your own or we provide one at cost plus a small markup. For larger capacities (8TB, 10TB, 16TB and above), target drives cost $400+ extra. All prices are plus applicable tax.
Why us
Why Choose Rossmann Group for RAID and NAS Recovery?
Rossmann Group combines PC-3000 Data Extractor, DeepSpar imaging hardware, and component-level board repair in a single Austin lab. You communicate directly with the engineer performing the recovery, not a sales team or call center script. No diagnostic fees. No-fix-no-fee guarantee. Founded 2008.
Image-first, offline reconstruction
We never rebuild risky arrays in place. Everything is assembled from clones for safety.
PC-3000 and DeepSpar tooling
We image on PC-3000 and DeepSpar hardware, then reconstruct mdadm, ZFS, and Btrfs arrays from the clones.
Transparent pricing
Clear ranges by member count and condition. If it's easier than expected, you pay less.
Direct engineer access
Straight answers from the person doing the work; no scripts, no sales middlemen.
No evaluation fees
Free estimate and honest likelihood of success before paid work begins.
No data, no recovery fee
If we can't recover usable data, you don't pay a recovery fee.
Our raid recovery services run from a single Austin, TX lab founded in 2008, with no franchises and no outsourcing. We clone every member on a PC-3000 Portable III or DeepSpar Disk Imager before any rebuild. Then we reconstruct the array offline from the on-disk array metadata with Data Extractor Express RAID Edition, so we don't need the original controller. We do mechanical work on our 0.02 micron ULPA-filtered clean bench. You reach the engineer directly, you pay no diagnostic fees, and you pay no recovery fee if we recover no data.
RAID levels
Which RAID Levels and Filesystems Do We Support?
We recover RAID 0, 1, 5, 6, 10, 50, and 60 arrays across mdadm, ZFS, Btrfs, Software-Defined Storage, NAS arrays from Synology, QNAP, and Buffalo, Drobo BeyondRAID, and enterprise SAN controllers. The filesystems we support include EXT4, XFS, NTFS, Btrfs, and ZFS.
For enterprise environments running Dell PowerEdge, HP ProLiant, or IBM servers with dedicated RAID controllers, see our enterprise server data recovery services.
Striped RAID 6 sub-arrays for enterprise servers. Multi-span dual-parity reconstruction.
SAN, DAS, and Software-Defined Storage Recovery
Beyond hardware RAID controllers, enterprise data centers deploy Storage Area Networks (SAN), Direct-Attached Storage (DAS), and Software-Defined Storage (SDS) architectures. SAN environments using iSCSI or Fibre Channel present Logical Unit Numbers (LUNs) carved from the arrays underneath. When a SAN enclosure fails, we have to reconstruct the underlying arrays and translate the LUN mapping to extract the target datastores.
Software-Defined Storage removes the hardware controller entirely, relying on the operating system to manage parity and striping. We perform logical reverse-engineering for failed SDS implementations, including Windows Storage Spaces, Windows Dynamic Disks, and Linux-based logical volume managers. In every case we clone the member drives first, then reconstruct the SDS cluster map virtually from the images.
NAS architectures
How Do We Recover NAS Architectures Like Synology SHR, Btrfs, and LVM?
NAS devices from Synology, QNAP, and Buffalo run software RAID rather than a hardware RAID controller. Synology and QNAP QTS put Linux md-raid under a Logical Volume Manager (LVM) layer with Btrfs or ext4 volumes on top. Buffalo units run mdadm with the data volume mostly formatted XFS. We have to parse each of these layers independently.
Synology Hybrid RAID (SHR) is an implementation built on top of standard Linux md-raid. It allows mixed-capacity drives by creating multiple md-raid arrays and combining them under LVM.
When a Synology NAS reports "Volume Crashed" or "Storage Pool Degraded," the failure can originate at the md-raid layer (member dropout, superblock corruption), the LVM layer (metadata table damage, logical volume deactivation), or the btrfs filesystem layer (tree root corruption, chunk allocation errors). Each failure requires a different recovery path.
We extract the drives from the NAS chassis and image each member on PC-3000 hardware. Then we reconstruct the md-raid, LVM, and btrfs or ext4 layers from the cloned images.
This workflow applies to any md-raid or LVM-based NAS device reporting a degraded storage pool.
Unraid is different: it does not stripe data across drives. Each data drive holds an independent XFS or Btrfs filesystem protected by a dedicated parity drive, so a healthy data disk can be mounted directly on a Linux workstation without virtual array assembly.
VMware ESXi and VMFS Datastore Recovery
Enterprise environments running VMware ESXi store virtual machines on VMFS (Virtual Machine File System) datastores, which themselves sit on top of a RAID volume. When the underlying array fails, recovery requires navigating nested storage layers: physical RAID stripe reconstruction, then VMFS volume parsing, then flat .vmdk extraction, and finally the guest operating system's filesystem (NTFS, ext4, XFS) inside each virtual disk.
After imaging all members and reconstructing the RAID offline, we open the datastore from the cloned images with PC-3000 Data Extractor, which supports the VMFS file system and VMDK virtual disk images. We locate each flat .vmdk file and extract the internal guest filesystem without requiring the original ESXi hypervisor to boot. Data Extractor also supports Hyper-V .vhdx virtual disk images.
Synology NVMe cache
What Happens When a Synology NVMe SSD Cache Fails?
On Synology Plus units, when an NVMe drive acting as a dirty write cache drops off the PCIe bus, the uncommitted writes are lost. The hard drive array underneath is left with an incomplete, corrupted Btrfs filesystem, and DSM reports Volume Crashed.
We image all members and the failed NVMe cache drive, then work on the Btrfs filesystem from the clones.
Drobo BeyondRAID systems abstract physical disks into a virtualized storage pool using thin provisioning and proprietary block allocation. Standard mdadm or ZFS tools fail because the array geometry isn't stored in any open metadata format. We image all members to extract files from the virtualized volume.
Drobo BeyondRAID systems abstract physical disks into a virtualized storage pool using thin provisioning and proprietary block allocation. Drobo Inc. filed for bankruptcy and was liquidated in 2023, so there is no remaining manufacturer support or firmware for these units.
Standard mdadm or ZFS recovery tools fail on BeyondRAID because the array geometry is not stored in any open metadata format. Recovery requires locating the proprietary Data Allocation Table on each member drive, then mapping how the blocks it describes are distributed across mixed-capacity members.
We image all NAS members and use specialized RAID recovery software to parse the BeyondRAID metadata structures from the raw member images. The Data Allocation Table defines which physical blocks on each drive correspond to which virtual addresses in the storage pool. Once this mapping is reconstructed, we extract files from the virtualized volume without needing the original Drobo chassis or its proprietary firmware.
Location
Where Is the Lab and How Does Mail-In RAID Recovery Work?
All RAID recovery work is performed in-house at our lab: 2410 San Antonio Street, Austin, TX 78705. Walk-in evaluations are available Monday - Friday, 10 AM - 6 PM CT. For clients outside Austin, we accept mail-in shipments from all 50 states. Your drives stay in our lab under chain-of-custody from intake through delivery.
Logistics
Shipping
Secure Mail-In from Anywhere in the US
Shipping
Mail-in
Transit time depends on the carrier and service you choose.
Security & Insurance
Fully Insured
Use FedEx Declared Value to cover hardware costs. We return your original drive and recovered data on new media.
Packaging Standards
✓Use the box-in-box method: float a small box inside a larger box with 2 inches of bubble wrap.
✓Wrap the bare drive in an anti-static bag to prevent electrical damage.
✗Do not use packing peanuts. They compress during transit and allow heavy drives to strike the edge of the box.
IT directors evaluating a recovery lab need two numbers & one access policy: how long the array will be offline (RTO), how far back the recoverable state is frozen (RPO), & whether they talk to the engineer doing the work or a sales handler. These are the honest answers for a failed RAID 5, 6, 10, or 60.
Who Handles Your Array & How Is Custody Managed?
IT administrators evaluating a mail-in recovery lab need three answers before shipping a 24-drive enclosure.
HIPAA and BAAs
We are not HIPAA certified & do not sign Business Associate Agreements. PHI workloads belong at a HIPAA-compliant lab.
Chain-of-custody from intake to delivery
Every member drive is logged on arrival at our Austin, TX lab & stays in the lab under documented chain-of-custody until the recovered data ships back. No third-party forwarders, no satellite offices, no outsourced cloning.
Direct engineer contact
One phone number connects you to the technician running the PC-3000 session or the clean-bench head swap on your array. There's no dedicated account specialist and no sales layer between the IT administrator & the engineer reading the service-area logs.
RTO by Array Condition Class
RTO depends on the physical state of the member drives. Each member is imaged at the pricing tier its condition falls into, and the published turnaround for that tier applies to that member: a member that needs a clean-bench head swap carries the head-swap turnaround of 4-8 weeks.
Condition Class
Per-Member Work
Member turnaround
Healthy-member imaging Array degraded by controller or logical fault; members still read cleanly.
Clone of each member, RAID reconstruction via PC-3000 Data Extractor.
Set by the pricing tier of each member
Weak-member imaging One or more members have reallocated sectors, slow reads, or firmware module corruption.
Imaging by head map in PC-3000 Data Extractor or on the DeepSpar Disk Imager.
Set by the pricing tier of each member
Degraded member requiring head swap Clicking, beeping, or non-spinning member; mechanical failure confirmed.
Donor-drive sourcing, head stack transplant on 0.02 micron ULPA clean bench, then imaging.
4-8 weeks
A $100 rush fee moves the case to the front of the queue. Donor drives are matching drives used for parts. Typical donor cost: $50–$150 for common drives, $200–$400 for rare or high-capacity models. We source the cheapest compatible donor available.
RPO: Why Image-First Preserves Your Recoverable State
RPO is measured backward from the moment of failure; RTO is measured forward. Image-first offline reconstruction means we clone each member, freeze the array at the intake state, & rebuild virtually from the clones. The RPO stays fixed at the moment the drives hit our bench.
When an LSI MegaRAID, Dell PERC, or Adaptec controller starts an in-place rebuild on a degraded array, it reads every surviving sector across every surviving member.
Consumer drives specify a worst-case Unrecoverable Read Error rate of 1 in 10^14 bits; rebuilding a 4-drive array of 8 TB members reads roughly 24 TB across aging survivors, which raises the chance of a latent unreadable sector and runs them at sustained load long enough for a marginal same-batch member to fail mechanically.
What the controller does on a URE varies: legacy and low-end controllers abort and drop the volume; modern PERC and LSI/Broadcom MegaRAID puncture the stripe and continue. A rebuild on degrading hardware can still overwrite recoverable state either way.
Any of those outcomes overwrites the last-known-good state that arrived at the lab & pushes your RPO backward.
Will You Speak Directly with the RAID Recovery Engineer?
You talk to the technician running the PC-3000 session or performing the clean-bench head swap. There's no account specialist and no sales layer between you & the person with hands on the drive. There's one phone number and one lab.
How Is RAID Chain-of-Custody Documented?
Documented chain-of-custody. Every array follows the same chain-of-custody protocols from intake through delivery, whether it is a 2-member mirror or a 24-member server array.
No-fix-no-fee guarantee. If we recover nothing usable, we don't charge a recovery fee. Read the full guarantee.
Chain of custody
How Do We Handle Your Drives Under Chain-of-Custody?
Every drive that enters our lab follows the same custody protocol, whether it is a single consumer drive or a 24-member server array. Enterprise arrays contain business-critical data, and your drives stay in our lab under chain-of-custody from intake through delivery.
1
Intake
Every package is opened on camera. Your drive gets a serial number tied to your ticket before we touch anything else.
2
Diagnosis
Chris figures out what's actually wrong: firmware corruption, failed heads, seized motor, or something else. You get a quote based on the problem, not the "value" of your data.
3
Recovery
Firmware work happens on the PC-3000. Head swaps and platter surgery happen in our ULPA-filtered bench. Nothing gets outsourced.
4
Return
Original drive plus recovered data on new media. FedEx insured, signature required.
Data Recovery Standards & Verification
Our Austin lab operates on a transparency-first model. We use industry-standard recovery tools, including PC-3000 and DeepSpar, combined with strict environmental controls to maintain drive integrity. This approach allows us to serve clients nationwide with consistent technical standards.
Serving clients nationwide via mail-in service since 2008. Our lead engineer holds PC-3000 and HEX Akademia certifications for hard drive firmware repair and mechanical recovery.
Our "No Data, No Charge" policy means we assume the risk of the recovery attempt, not the client.
LR
Technical Oversight
Louis Rossmann
Our engineers review all lab protocols to maintain technical accuracy and honest service. Since 2008, his focus has been on clear technical communication and accurate diagnostics rather than sales-driven explanations.
We believe in showing the bench rather than just describing it. Open-drive work runs on a 0.02 micron ULPA-filtered laminar clean bench, and we filmed it.
Can you recover a Synology or QNAP that says "Volume crashed"?
Often, yes. We image each member, capture RAID metadata, reconstruct the array offline, and recover data from the images.
Should I try a RAID rebuild if it's degraded?
Not if the data is irreplaceable and you don't have a verified backup. A rebuild puts every surviving member under sustained read load. If there's a second failure during it, a single-parity array goes offline. Power down and don't write to the array. If you do have a verified backup, a monitored rebuild is standard practice.
Two drives failed in my RAID-5. Is there any chance?
Sometimes. If one of the two failures is electrical (burned TVS diode, failed motor driver IC), board-level component repair can restore that drive to a readable state, reducing the failure count back within RAID 5's single-parity tolerance. Even without board repair, partial recovery is possible when failure timelines overlap favorably or one member is only marginally degraded.
How long does RAID data recovery take?
Turnaround depends on the physical condition of each member drive. Each member is imaged at the pricing tier its condition falls into, and the published turnaround for that tier applies to that member: a member that needs a clean-bench head swap carries the head-swap turnaround of 4-8 weeks.
Do you need my entire NAS chassis?
Usually just the drives and any encryption keys. On a Linux md array, each member's superblock records its role in the array. On ZFS the vdev label does the same job. That means the reconstruction doesn't depend on the physical slot order. We still recommend labeling the slots when you pull the drives.
How is RAID recovery priced?
Per-member imaging for logical/firmware issues, array reconstruction line item, and mechanical member work only when needed. If we recover nothing, you don't pay a recovery fee.
What is the true cost of RAID data recovery?
RAID data recovery cost depends on the number of member drives and their physical condition. We charge a per-drive imaging fee ($250-$900 for logical or firmware failures; $1,200–$1,500 for head swaps) plus a $400-$800 array reconstruction fee. If we recover nothing, there's no recovery fee. We do not charge arbitrary amounts based on perceived data value.
What determines the success rate of RAID recovery?
It depends on whether the platters are physically scored, whether a forced rebuild or re-initialization wrote over the members, and how many members remain readable. We don't publish fabricated success percentages because outcomes vary by array condition.
Why is RAID 6 dual-parity reconstruction more complex than RAID 5?
RAID 5 uses XOR parity to calculate the data of a single failed drive. RAID 6 computes two independent parity blocks, P and Q, and tolerates two drive failures. In the standard P+Q scheme, P is ordinary XOR parity and Q is a Reed-Solomon code computed in a Galois field. To recover two lost data drives you need both P and Q and Galois field arithmetic. XOR by itself isn't enough.
Can data be recovered after a RAID controller was accidentally reconfigured or re-initialized?
It depends on what the controller did. Clearing a foreign configuration erases the configuration records from the member drives. We image the members, and Data Extractor's auto-detection mode works out the array configuration from the file systems and user data on the images. If the controller wrote zeros over the member drives, the overwritten sectors are gone. Stop all activity and send us the drives for evaluation before you assume the data is lost.
Why do consumer SMR drives fail during RAID rebuilds?
Shingled Magnetic Recording (SMR) drives write data in overlapping tracks and stage incoming writes in a CMR cache zone. During a RAID rebuild that cache zone overflows, and a consumer SMR drive stalls for 30 to 60 seconds while it reorganizes data. The Linux kernel reads that latency as a dead drive and ejects it, which crashes the volume.
How do you determine which drive failed first in a RAID 5 array with two failed members?
We read the RAID metadata on each failed member. The member that went offline first is the stale drive, and its data doesn't match the current array state anymore. If we used its outdated contents in the reconstruction, the output would come out corrupted. We identify it from the metadata on the members, leave it out, and reconstruct from the fresher members.
What does it mean when my RAID is degraded?
A degraded array is still online and serving data, but a member has dropped and the array has lost redundancy. Where the data is irreplaceable and you have no verified backup, stop all writes and do not click rebuild or repair. A degraded RAID 5 rebuild pins every surviving member at sustained read for many hours. That makes it more likely a second member turns up a latent unrecoverable sector. In that case image each survivor first, then reconstruct offline from the clones; where a verified backup exists, a monitored rebuild is standard practice.
My RAID rebuild failed. Is my data gone?
Not necessarily. A failed rebuild means the resync aborted, for example because a second member dropped under sustained load. We image every member on PC-3000 and DeepSpar hardware. Then we compare the event count in each member's mdadm superblock across the clones to find the stale member, and we reconstruct the array virtually from the clones. You don't pay a recovery fee if we recover nothing.
Why don't you need the original RAID controller to recover the array?
The array geometry is written to the member drives themselves, not only to the controller card. We image each member drive on PC-3000 hardware, then reconstruct the array virtually from the clones with Data Extractor. We don't need the original hardware.
What is the probability of a RAID 5 rebuild failing on large-capacity drives?
Consumer drives carry a worst-case Unrecoverable Read Error (URE) spec of 1 in 10^14 bits, roughly one bad sector per 12.5 TB read. That number is the manufacturer's worst-case specification. It isn't a schedule. Real drives often do far better, and the risk rises with array size and drive age. Rebuilding a 4-drive array of 8 TB members reads roughly 24 TB across the survivors, which raises the probability of hitting a latent unreadable sector, but the dominant real-world failure is mechanical: a full-surface rebuild pins aging same-batch survivors at sustained read for the length of the pass and pushes a marginal head, preamp, or bearing past its threshold. We image each member independently, so when we hit a bad sector during imaging we log it and skip it, and it doesn't eject a drive from a live array.
What is the typical Recovery Time Objective (RTO) for a failed RAID 5 array?
RTO depends on the physical condition of the member drives, not on array size alone. Each member is imaged at the pricing tier its condition falls into, and the published turnaround for that tier applies to that member: a member that needs a clean-bench head swap carries the head-swap turnaround of 4-8 weeks. A $100 rush fee moves the case to the front of the queue without changing the physical recovery timeline.
How does an in-place RAID rebuild affect my Recovery Point Objective (RPO)?
RPO is measured backward from the moment of failure; RTO is measured forward. An in-place rebuild on a degraded RAID 5 or 6 forces the controller to read every surviving sector under sustained load until the pass completes, which stresses aging same-batch survivors and raises the chance of a latent unreadable sector against the worst-case 1 in 10^14 URE floor on consumer drives. What happens on a URE depends on the controller: legacy and low-end controllers abort and drop the volume; modern PERC and LSI/Broadcom MegaRAID puncture the stripe and continue, losing only that stripe. Either way the rebuild can overwrite the last-known-good state at intake & push RPO backward. Image-first offline reconstruction freezes the array at the point-of-failure state & rebuilds from clones, so the RPO is preserved at the moment the drives arrived in the lab.
Will I have to communicate through an account manager for status updates?
No. You speak directly with the technician running the PC-3000 session or performing the clean-bench head swap on your array. There's no dedicated account specialist and no sales layer between you & the engineer reading the service-area logs. One phone number, one lab, one person with hands on the drive.
How do you determine RAID array geometry if the controller is dead?
We work out the stripe (chunk) size, parity rotation, and member order from the cloned member images, not from the controller. Data Extractor's auto-detection mode analyzes the file systems and user data on the clones, so we don't need the original card.
