Drobo BeyondRAID Recovery
BeyondRAID Recovery
BeyondRAID is Drobo's proprietary storage format. It is not mdadm, not LVM, and not a standard hardware RAID stripe, so when a Drobo will not mount its volume the disks alone are not enough: the BeyondRAID metadata has to be parsed before any filesystem can be read.
Drobo Inc. and its parent StorCentric were liquidated in 2023, so there's no manufacturer support to call. We image every member disk through a write-blocker and reconstruct the BeyondRAID Data Allocation Table offline in our Austin, TX lab.
What does BeyondRAID recovery actually require?
Recovery means bypassing the bankrupt chassis, imaging every disk through a write-blocker, and parsing the DAT and bitmap offline to rebuild the virtual LUN before any filesystem can be mounted.
What is BeyondRAID and why can't standard tools read it?
BeyondRAID is Drobo's proprietary, closed-source block-level virtualization layer. Instead of building a single RAID 5 or RAID 6 set across the disks, it lays zone-based parity over a thin-provisioned virtual LUN and tracks which blocks hold real data through a bitmap rather than uniform stripes. Standard Linux mdadm, LVM, and general-purpose hardware RAID controllers cannot parse that layout, because none of it is standard RAID metadata.
The metadata that makes a Drobo work is a Data Allocation Table. The DAT is the map of where every block of the virtual volume sits on the member drives.
On 5N and 5N2 NAS units the virtual BeyondRAID volume is formatted with ext3 or ext4. On the direct-attached 5C, 5D and 5D3, the host formats the virtual LUN with NTFS or HFS+ as if it were one large external disk. Either way, the filesystem sits on a virtual block device whose layout only exists inside the BeyondRAID metadata.
A working Linux box can assemble a generic mdadm array or a Synology SHR pack, because those formats are open. A Drobo pack needs something else: specialized software with BeyondRAID support.
Those open formats are handled through our NAS data recovery service, where a Linux box reassembles the array directly, while BeyondRAID always needs the proprietary DAT parsed from raw images first.
What does mdadm read before it assembles an array?
The md(4) manual page explains how Linux software RAID, the layer Synology SHR is built on, puts an array back together. Each member device "may have some metadata stored in the device," called a superblock. That metadata "records information about the structure and state of the array," and it "allows the array to be reliably re-assembled after a shutdown."
Running mdadm --examine against a member reads that superblock without writing to the disk. On 1.x metadata it reports the member's Device Role, which is its position in the array, and the same record holds the chunk size, layout, and data offset.
The superblock's location depends on the metadata version: 0.90 and 1.0 sit at the end of the device, 1.1 at the very start, and 1.2 at 4 KiB from the start. In our Linux mdadm recovery work, mdadm --assemble --readonly starts from that record.
BeyondRAID isn't Linux md-raid, so that record is not what describes a Drobo pack. Drobo keeps its layout in its proprietary Data Allocation Table, and mdadm doesn't parse the DAT. Pointing mdadm --assemble at the disks from a Drobo won't produce the Drobo volume. Forcing the issue with mdadm --create is destructive, because it writes superblocks to the disks it's given, and on a Drobo those are the same disks that carry the allocation map.
Why does thin provisioning break ordinary recovery software?
BeyondRAID shows the host a virtual volume whose size isn't tied to how much disk is installed. Only the allocated extents contain real data; the rest is empty space the allocator would fill as the volume grew.
We parse the allocation bitmap first and keep the reconstruction to allocated extents. Only after that do we walk the filesystem on top.
Variable stripe widths
BeyondRAID can lay different stripe widths across different zones. Reconstruction has to walk the Data Allocation Table zone by zone instead of assuming one uniform layout.
Standard parity arrays with fixed stripe geometry are handled through our RAID data recovery work, whereas BeyondRAID's variable stripe widths and thin provisioning demand zone-by-zone DAT reconstruction.
Mixed-capacity zoning
BeyondRAID handles drives of different sizes by pulling regions from several drives together into redundant zones. Those zones come in different types and sizes, and any of them can use regions from any drive. Each zone carries its own redundancy parameters, so the on-disk layout is not uniform across the array.
Single and dual redundancy
BeyondRAID can shift between single-disk redundancy (similar in tolerance to RAID 5 parity) and dual-disk redundancy (similar to RAID 6), and it records that choice in the metadata. Data and parity blocks are not located at the same offsets the way a fixed RAID would place them.
A fixed RAID 5 or RAID 6 puts every parity block at a position computable from the stripe number and the rotation algorithm, which is what makes parity reconstruction arithmetic rather than discovery. BeyondRAID gives that property up. Redundancy is a per-zone attribute held in the metadata, so the layout has to be read out of the Data Allocation Table before reassembly starts, which is a different starting point from the fixed-geometry arrays in our server array recovery work.
BeyondRAID is not a backup
Redundancy is availability, not protection. A BeyondRAID array's redundancy does nothing about accidental deletion, a controller failure, or disks from the same batch failing one after another. Only a separate backup protects the data.
How does a BeyondRAID array actually fail?
Nobody has built a new Drobo since Drobo Inc. was liquidated in 2023. Donor units and replacement parts only come from the secondary market.
Chassis, blinking-red-light, and pack-state problems that sit above the BeyondRAID layer itself are covered through our broader Drobo data recovery hub.
Bay LEDs separate those states before a disk comes out of the chassis. A bay blinking red means that disk has failed. If the bay lights are blinking back and forth between yellow and green, the Drobo is busy protecting your data. Don't pull any disk until the lights are solid green. A unit stuck in the red-light reboot loop can't assemble the BeyondRAID volume. That's the failure behind a blinking red light on a Drobo. Don't give that pack another power cycle. Send it through our emergency data recovery intake and we'll image it write-blocked.
Red-light reboot loop
A Drobo stuck in the red-light reboot loop can't assemble its BeyondRAID volume, so we image the disks and reconstruct the metadata offline.
Chassis power supply or controller death
With no replacement chassis being manufactured, the recovery path is to bypass the dead controller by imaging the disks directly.
Chassis swap attempted before imaging
Clone every disk first, then try the swap on the clones.
Cascading aged-drive failure
When one disk fails and the array rebuilds, the sustained read-write stress pushes the remaining aged disks, and a second or third can fail mid-rebuild. If there's no backup of that data, shut the unit down instead of letting a rebuild run on marginal disks.
Should I move the disks into a replacement Drobo chassis?
Not before imaging. It is the obvious move, and it is the one that leaves you without a fallback if it goes wrong.
Image first, then experiment. Clone every disk through a write-blocker. Once you have full images you can attempt the pack swap on the clones.
A pack re-initialization reaches the disks that hold the allocation map
Another destructive move sits inside Drobo Dashboard: the reset that re-initializes the disk pack. Drobo's own B800i Getting Started Guide warns that this reset "will erase all data on the drives."
That warning is about the drives, not about the box. The BeyondRAID allocation map lives on the member disks, which is why a lab parses it out of raw sector images rather than out of the chassis.
Because BeyondRAID uses variable stripe widths and per-zone redundancy, you can't work out the allocation map with arithmetic the way you can on a fixed RAID 5 parity rotation.
The 2023 liquidation ended OEM firmware updates, and no current-production Drobo hardware is sold on the primary market. Image every disk through a write-blocker before anyone opens the reset dialog.
How does Rossmann Group recover a BeyondRAID array?
All work happens in-house at our Austin, TX lab. Single location, no franchises, no outsourcing, no shipping your disks to a third-party partner. The workflow is image-first, and the original disks are never modified.
- Ship the whole Drobo plus every drive. We need the chassis and every disk, including any disk that was failed out or already swapped for a replacement.
- Write-blocked imaging of every disk. We connect each member disk through a hardware write-blocker and image it with PC-3000 Portable III, PC-3000 Express, or DeepSpar Disk Imager. On weak or clicking disks, we use conservative retry profiles. When we find a disk needs donor heads, we swap them on the clean bench before we try to image it.
- Parse BeyondRAID metadata offline. The Data Allocation Table and the thin-provisioning bitmap are parsed from the imaged copies, never the originals. The bitmap restricts reconstruction to allocated extents so unallocated space is never carved.
- Reconstruct the virtual LUN. Using the parsed metadata, the virtual LUN is rebuilt zone by zone, mapping each allocated extent back to physical blocks across all member images and accounting for the dynamic stripe widths and redundancy zones BeyondRAID laid down over the array's life.
- Mount the filesystem and extract. On 5N and 5N2 units, we mount the reconstructed LUN read-only as ext3 or ext4. On the direct-attached 5C, 5D and 5D3, we mount it as HFS+ or NTFS to match the original host format. We verify the files against your priority list and copy them to target media.
Imaging every member comes before interpreting the array
When the data is irreplaceable and unbacked, or a member is already degrading, every disk in the pack is imaged through a write-blocker first. Nothing reads the pack as an array until that's done. DAT parsing and virtual LUN reconstruction then run against the clones, so the originals never see a parse that goes wrong.
Letting the Drobo rebuild first puts the rebuild's read load on the original disks. If the disks are marginal and came from the same manufacturing batch, that load can push a sibling into a second failure. On an unbacked pack with no redundancy left, that failure is how rebuilding a degraded array destroys data.
This order is a recovery protocol for unbacked data. With a verified, current backup somewhere else, a monitored rebuild is standard practice, because redundancy only keeps the volume available and the backup is what protects the data.
No diagnostic fee. No data, no recovery fee. Free evaluation before any work begins.
How much does BeyondRAID recovery cost?
BeyondRAID recovery is billed using the published per-drive hard drive tiers because each member disk is scoped by its own failure type. Here's what each drive costs: From $250 for file-system work, $600–$900 for firmware repair, and $1,200–$1,500 for head swaps. Putting the BeyondRAID volume back together offline from the disk images carries a separate published array reconstruction fee of $400-$800, on top of the per-drive tiers. If we recover nothing, there is no charge.
- 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
- 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
- Medium complexity
Firmware Repair
Your drive is completely inaccessible. It may be detected but shows the wrong size or won't respond
Firmware corruption: ROM, modules, or translator tables corrupted; requires PC-3000 terminal access
CMR drive: $600. SMR drive: $900.
$600–$900
3-6 weeks
- High complexity
Head Swap
Bench diagnosis found the read/write heads have to be replaced. Clicking can also come from firmware, the preamp, or the spindle
Head stack assembly failure. Transplanting heads from a matching donor drive on a clean bench
50% deposit required. CMR: $1,200-$1,500 + donor. SMR: $1,500 + donor.
50% deposit required
$1,200–$1,500
4-8 weeks
- High complexity
Surface / Platter Damage
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
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.
Localized Clean Zone
Open-drive work is performed in a 0.02 micron ULPA-filtered laminar clean bench.
Transparent History
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.
Media Coverage
Our repair work has been covered by The Wall Street Journal and Business Insider, with CBC News reporting on our pricing transparency. Louis Rossmann has testified in Right to Repair hearings in multiple states and founded the Repair Preservation Group.
Aligned Incentives
Our "No Data, No Charge" policy means we assume the risk of the recovery attempt, not the client.
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.
See the particle counter test at the benchBeyondRAID Recovery FAQ
Can standard RAID software read a Drobo?
No. Drobo uses a proprietary block-level virtualization layer called BeyondRAID, with variable stripe widths, thin provisioning, and a custom Data Allocation Table. Standard Linux mdadm, LVM, and general-purpose hardware RAID controllers cannot parse that layout. Getting the data back takes specialized software with BeyondRAID support.
Why does thin provisioning matter for BeyondRAID recovery?
BeyondRAID shows the host a virtual volume whose size isn't tied to how much disk is installed. Only the allocated extents hold real data. The thin-provisioning bitmap has to be parsed before the filesystem on top can be reconstructed.
Is Drobo still supported by the manufacturer?
No. StorCentric, the parent company that owned Drobo, filed for Chapter 11 bankruptcy on June 20, 2022, then converted to Chapter 7 liquidation in April 2023. By early 2024 the official Drobo website was no longer accessible.
Should I move my Drobo drives to a replacement chassis?
No, not before imaging. Image every disk through a write-blocker first, then attempt any pack swap on the clones.
How does a forensic lab recover data from a dead Drobo?
Engineers remove every disk from the failed chassis, create sector-by-sector clones through hardware write-blockers, and parse the BeyondRAID Data Allocation Table and thin-provisioning bitmap from the clones. The virtual LUN is reconstructed zone by zone, accounting for the dynamic stripe widths, and the host filesystem on top is mounted read-only so files can be extracted. The original disks are never modified.
How much does BeyondRAID recovery cost?
BeyondRAID recovery is billed using the published per-drive hard drive tiers because each member disk is scoped by its own failure type: From $250 for file-system work, $600–$900 for firmware repair, and $1,200–$1,500 for head swaps. Putting the BeyondRAID volume back together offline from the disk images carries a separate published array reconstruction fee of $400-$800, on top of the per-drive tiers. If we recover nothing, there is no charge.
Since 2008
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