SSD Controller Architecture
Silicon Motion SSD Data Recovery
If your Silicon Motion SATA or NVMe drive runs on a controller ACE Lab lists as supported for PC-3000 SSD, we can recover it in our Austin lab. The Silicon Motion utility uploads a temporary loader into the controller's RAM & runs the drive without its corrupted firmware. The Flash Translation Layer is then rebuilt from NAND metadata & the drive is imaged. SATA recovery runs $200–$1,500, NVMe $200–$2,500. No diagnostic fee. No data, no recovery fee.
Consumer recovery software can't fix this class of failure. A drive stuck in a BSY state or ROM mode doesn't enumerate as storage to the operating system, so file recovery tools have nothing to talk to. We have to stabilize the controller at the firmware level first. MPTool isn't a repair path either, because it reinitializes the FTL & overwrites the existing mapping.
We recover the SM2258XT, SM2259XT, SM2262EN, SM2263XT, & SM2269XT the same basic way. We get past the corrupted firmware with PC-3000 SSD's Silicon Motion utility, rebuild the Flash Translation Layer from NAND metadata, & image the data. SATA recovery starts at $200. NVMe starts at $200. No diagnostic fee.
What to Do When Your Silicon Motion SSD Fails
Shut the SSD off now & don't power it back on. As long as it has power, the drive keeps erasing data your operating system marked as deleted. It does that in the background, on its own.
- Do not run recovery software on a BSY-state or undetected drive.
- Do not initialize the drive in Disk Management.
- Do not run MPTool or firmware updaters. MPTool reinitializes the FTL, which destroys the mapping table your data depends on.
- Do not keep the drive powered on. It keeps erasing deleted data in the background whenever it has power, even with the data cable unplugged.
For the full scope of our SSD data recovery, see the main hub.
MPTool Destroys Data. Do Not Run It.
MPTool is a factory reflashing tool, not a recovery tool. Run it on a drive that still holds your data and it reinitializes the FTL and overwrites the existing mapping. Your data is gone after that.
- MPTool writes a fresh FTL. It wipes the mapping table your data depends on.
- If your drive reports its raw controller name or won't detect, send it for professional evaluation. Do not attempt firmware tools at home.
Which Silicon Motion Controller Is in Your SSD?
| Controller | Interface | DRAM | Common Drives | PC-3000 Support |
|---|---|---|---|---|
| SM2258XT | SATA | No | Crucial BX500, ADATA SU650 | Silicon Motion utility |
| SM2259XT | SATA | No | Silicon Motion utility | |
| SM2262EN | NVMe Gen3 | Yes | HP EX920 | Silicon Motion utility |
| SM2263XT | NVMe Gen3 | No (HMB) | HP EX900, Lexar NM600 | Silicon Motion utility |
| SM2269XT | NVMe Gen4 | No (HMB) | ADATA Legend 800, ADATA Legend 850 Lite | Silicon Motion utility |
| SM2267XT | NVMe Gen4 | No (HMB) | Kingston NV2 | Silicon Motion utility |
For the broader service overview, see our SSD data recovery service.
Which Consumer SSD Models Use Silicon Motion Controllers?
The table below maps common retail SSDs to their specific SMI controller die to identify the correct hardware recovery path.
| Consumer Drive | Controller | Interface |
|---|---|---|
| Crucial BX100 | SM2246EN | SATA |
| ADATA SU800 | SM2258H | SATA |
| HP EX920 | SM2262EN | NVMe Gen3 |
| HP EX900 | SM2263XT | NVMe Gen3 |
| ADATA Legend 800 | SM2269XT | NVMe Gen4 |
| ADATA EU800 | SM2320G | USB |
| Transcend ESD310 | SM2320G | USB |
| Kingston XS2000 | SM2320G | USB |
If your drive model isn't listed, we can identify the controller by reading the laser marking on the controller die under magnification. For the broader service overview, see our SSD data recovery service page.
Controller Lottery Warning
Some retail SSDs change controllers between manufacturing batches without changing the model number. The recovery path differs for each controller. Visual PCB inspection under magnification is the only reliable way to identify which silicon is present. For the broader service overview, see our SSD data recovery service.
How Do Silicon Motion SSDs Fail?
Firmware Corruption
The drive appears in BIOS with its factory silicon descriptor (e.g., "SM2258XT") instead of the consumer brand name. Sometimes it shows a capacity of 0 bytes. The NAND still holds your data; the controller just can't read its own firmware to access it. PC-3000 injects a temporary firmware loader that bypasses the corruption and provides direct NAND access.
Controller Failure
A dead controller means the drive isn't detected anywhere: not in BIOS, not in Disk Management, not in a USB enclosure. Recovery requires board-level component repair with a Hakko FM-2032 microsoldering iron & FLIR thermal imaging to locate the failed component. SATA board repair: $450–$600. NVMe: $900–$1,200.
NAND Degradation
NAND flash cells have a finite write life. As cells wear, bit-flip rates increase until the controller's error correction can't keep up.
For the broader service overview, see our SSD data recovery service.
Why Chip-Off Recovery Fails on Modern Silicon Motion SSDs
Chip-off (desoldering the NAND chips and reading them on another machine) only works on an unencrypted drive. Even then, it only works if the controller's XOR scrambling and LDPC error correction can be reproduced outside the drive. Silicon Motion's product briefs list real-time full drive encryption with AES on the SM2258, SM2262EN, and SM2269XT. On a drive running that encryption, the controller generates the key itself, and the key never leaves the controller.
If the controller dies on an encrypted drive, the NAND holds nothing but ciphertext. Repairing the board so the original controller runs again is the only way back to the data.
Board repair is therefore data recovery for encrypted Silicon Motion SSDs. The engineer replaces the shorted PMIC, blown LDO, or failed decoupling capacitor that killed the controller. Get the original controller booting again and the AES key is still intact. PC-3000 can then image the decrypted data through the controller's own hardware. SATA board repair runs $450–$600. NVMe board repair runs $900–$1,200.
A donor controller will not decrypt the original NAND. For the broader service overview, see our SSD data recovery service.
How Does a Silicon Motion SATA Controller Fail Into Firmware Panic?
A BSY hang means the controller can't load its own firmware and stays busy indefinitely. When the Flash Translation Layer corrupts outright, an SM2258 or SM2259 instead drops to zero bytes through ROM mode or a BSY safe state.
Neither is the Phison SATAFIRM S11 string, and neither is BAD_CTX: that 8MB identifier belongs to the Intel 320 Series bug, not to Silicon Motion silicon.
- BSY hang
- Recovery is a standard PC-3000 loader injection & FTL rebuild from surviving system area copies.
- ROM Mode at Zero Bytes
- The controller cannot load its firmware modules from NAND at all, so it boots from internal ROM and reports zero bytes to the host. We recover it the same way: we put the controller in Safe Mode and inject a loader.
SATAFIRM S11 Is a Phison Failure, Not Silicon Motion
SATAFIRM S11 is a firmware panic string that appears exclusively on Phison PS3111 controllers. It does not occur on Silicon Motion drives. If a drive reports "SATAFIRM S11" in the model field, the controller is Phison, not SMI, & the recovery path runs through PC-3000 SSD's Phison utility with different loader profiles & PCB test points. SMI firmware panic looks different. On SATA, the drive either hangs in BSY indefinitely or drops into ROM mode at zero bytes.
Confusing the two controller families leads to wrong loader selection & wasted diagnostic time. Visual inspection of the controller die marking under magnification is the only reliable way to confirm which vendor silicon is on the board.
How Much Does Silicon Motion SSD Recovery Cost?
Silicon Motion SATA SSDs (SM2258XT, SM2259XT) and NVMe SSDs (SM2262EN, SM2263XT, SM2269XT) have different pricing tiers. The cost depends on failure severity, not the controller model. No diagnostic fee. No data, no recovery fee. Full SSD recovery cost breakdown. +$100 rush fee to move to the front of the queue.
SATA SSD Recovery (SM2258XT, SM2259XT)
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
$200
3-5 business days
Low complexity
File System Recovery
Your drive isn't showing up, but it's not physically damaged
File system corruption. Visible to recovery software but not to OS
Starting price; final depends on complexity
From $250
2-4 weeks
Medium complexity
Circuit Board Repair
Your drive won't power on or has shorted components
PCB issues: failed voltage regulators, dead PMICs, shorted capacitors
May require a donor drive (additional cost)
$450–$600
3-6 weeks
Medium complexity
Most Common
Firmware Recovery
Your drive is detected but shows the wrong name, wrong size, or no data
Firmware corruption: ROM, modules, or system files corrupted
Price depends on extent of bad areas in NAND
$600–$1,200
3-6 weeks
High complexity
PCB / NAND Swap
Your drive's circuit board is severely damaged and requires NAND chip transplant to a donor PCB
NAND swap onto donor PCB. Precision microsoldering and BGA rework required
50% deposit required; donor drive cost additional
50% deposit required
$1,200–$1,500
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. NAND swap requires 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
- A donor drive is a matching SSD used for its circuit board. Typical donor cost: $40–$100 for common models, $150–$300 for discontinued or rare controllers.
- 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. All prices are plus applicable tax.
A donor drive is a matching SSD used for its circuit board. Typical donor cost: $40–$100 for common models, $150–$300 for discontinued or rare controllers.
NVMe SSD Recovery (SM2262EN, SM2263XT, SM2269XT)
Low complexity
Simple Copy
Your NVMe 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
Low complexity
File System Recovery
Your NVMe drive isn't showing up, but it's not physically damaged
File system corruption. Visible to recovery software but not to OS
Starting price; final depends on complexity
From $250
2-4 weeks
Medium complexity
Circuit Board Repair
Your NVMe drive won't power on or has shorted components
PCB issues: failed voltage regulators, dead PMICs, shorted capacitors
May require a donor drive (additional cost)
$900–$1,200
3-6 weeks
Medium complexity
Most Common
Firmware Recovery
Your NVMe drive is detected but shows the wrong name, wrong size, or no data
Firmware corruption: ROM, modules, or system files corrupted
Price depends on extent of bad areas in NAND
$900–$1,200
3-6 weeks
High complexity
PCB / NAND Swap
Your NVMe drive's circuit board is severely damaged and requires NAND chip transplant to a donor PCB
NAND swap onto donor PCB. Precision microsoldering and BGA rework required
50% deposit required; donor drive cost additional
50% deposit required
$1,200–$2,500
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. NAND swap requires 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
- A donor drive is a matching SSD used for its circuit board. Typical donor cost: $40–$100 for common models, $150–$300 for discontinued or rare controllers.
- 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. All prices are plus applicable tax.
A donor drive is a matching SSD used for its circuit board. Typical donor cost: $40–$100 for common models, $150–$300 for discontinued or rare controllers.
Why Cleanrooms Don't Fix SSDs
An SSD has no moving parts and no exposed magnetic surfaces that require particle control.
Firmware recovery happens at a PC-3000 terminal; board-level PMIC repair happens at a soldering bench under a microscope. Cleanrooms are for HDD mechanical work, not SSDs.
The controller IC is a sealed BGA package; the NAND chips are epoxy-molded packages. There are no exposed surfaces that particulate could contaminate.
The lab performs board-level SSD repair at a standard ESD-safe soldering bench with a microscope. There is no cleanroom involved because the sealed BGA packages on an SSD have no exposed surfaces that particulate could contaminate. SATA board repair runs $450–$600; NVMe board repair runs $900–$1,200. For the full scope of our SSD data recovery service, see the main hub.
Why Consumer Recovery Software Cannot Fix Firmware Panic
Recovery software like Disk Drill, EaseUS, PhotoRec, and R-Studio works when the SSD is physically healthy but has a logical problem: accidentally deleted files, a corrupted partition table, or a formatted volume.
That changes when the controller is dead or the firmware is corrupted. Software cannot communicate with a drive that won't power on or that asserts BSY indefinitely. At that point, you need a lab with PC-3000 SSD and board-level repair capability.
- When software works
- Logical failures on a physically healthy drive with TRIM disabled: deleted files where garbage collection has not yet run, corrupted file system metadata that the OS cannot mount. In these cases, consumer software may extract data before the blocks are physically erased.
- When software cannot work
- Controller death, firmware corruption, NAND degradation past the ECC threshold, or TRIM-erased blocks. Software sends standard ATA or NVMe commands that the panicked controller ignores. It has no mechanism to short ROM test points, inject a forensic loader into RAM, or reconstruct a torn FTL from spare-area metadata.
The correct first step for an undetected or BSY-state Silicon Motion SSD is power-down and lab evaluation, not software scanning. For the broader service overview, see our SSD data recovery service.
Host Memory Buffer (HMB) Architecture Vulnerabilities
Host Memory Buffer (HMB) eliminates the onboard DRAM cache to reduce manufacturing costs. Instead of storing the Flash Translation Layer (FTL) in dedicated memory, HMB NVMe controllers borrow host system RAM via the PCIe bus. A power cut instantly severs this link, destroying uncommitted mapping tables and causing firmware panic.
On a DRAM-less NVMe HMB controller (SM2263XT, SM2269XT), the working FTL sits in host RAM. A power cut severs that link instantly. The in-flight FTL update never commits to NAND. On the next boot, the controller finds an incomplete or corrupted FTL in its NAND backup and enters a firmware panic state. SATA DRAM-less controllers (SM2258XT, SM2259XT) face a similar risk: the FTL backup lives in NAND, and a power cut during a write can corrupt that backup.
On the SM2258XT, SM2259XT, SM2263XT, and SM2269XT we recover it the same way. We short the pins to force the controller into ROM/Safe Mode and load a PC-3000 loader so the panicked firmware never runs. Then we rebuild the FTL from the NAND page metadata that survived.
- Flash Translation Layer (FTL)
- The mapping table that converts logical block addresses (what your operating system requests) to physical NAND page locations (where the data is stored on the flash chips). Every SSD maintains an FTL; when it corrupts, the controller can't locate any data even though the NAND still holds it.
- Host Memory Buffer (HMB)
- An NVMe specification feature (NVMe 1.2+) that allows the SSD controller to use a slice of host system RAM as a temporary cache for FTL operations. Eliminates the cost of onboard DRAM but makes the FTL dependent on an uninterruptible PCIe connection to the host. Only NVMe controllers (SM2263XT, SM2269XT) support HMB; SATA controllers (SM2258XT, SM2259XT) store FTL backups in NAND.
PCIe Link Drops and DMA Faults
When the host PC loses power, the PCIe link severs before the SSD controller can issue a flush command. The in-flight FTL update in host RAM never commits to NAND. On reboot, the controller finds an incomplete mapping table and enters firmware panic.
DRAM-less NVMe controllers are more vulnerable to this failure than DRAM-equipped models. The SM2263XT and SM2269XT rely on the HMB window for active FTL caching, so any interruption to the PCIe link destroys the in-flight mapping data.
In both scenarios, the user data is intact inside the NAND cells. Only the FTL (the logical map) was destroyed by the HMB failure. Recovery rebuilds the map from surviving NAND metadata without touching the actual user data pages.
HMB Size Negotiation: HMPRE, HMMIN, and Partial Allocation
HMB allocation is not a fixed value. An NVMe controller that supports HMB puts two numbers in its Identify Controller data: HMPRE, the buffer size it would prefer, and HMMIN, the minimum. The host doesn't have to hand over all of it. It can give the full amount, part of it, or nothing, and the controller has to keep working without it.
The Windows 11 24H2 update gave Western Digital SN770 and SN580 drives too much Host Memory Buffer, up to 200MB, and that caused blue screens. The crashes were temporary. The drives weren't physically damaged and no data was lost.
How Is the Flash Translation Layer Rebuilt After Corruption?
When the controller's address map corrupts, the logical-to-physical mapping between your files and the NAND pages that store them is lost. PC-3000 SSD rebuilds that map from whatever translator data is still on the NAND.
From that data it builds a virtual translator. Then we read the file system through the virtual translator instead of the dead FTL. The result is a mountable image with the original file system structure intact.
Technical reference: how SSD wear leveling works | why SSDs report 0 bytes
PC-3000 Silicon Motion utility Workflow
The PC-3000 SSD module includes a dedicated Silicon Motion utility with controller-specific loader profiles for each SMI generation. The workflow varies by interface (SATA vs. NVMe) and controller model, but the core sequence is consistent across the family.
SATA Controllers (SM2258XT, SM2259XT)
- Connect the drive over SATA to a PC-3000 Express or Portable III.
- Short the safe-mode pins (usually marked ROM) and leave them shorted.
- Pick the Silicon Motion utility and the controller. The utility initializes the drive and reads the NAND chip ID.
- Upload the loader that matches the NAND and the drive's firmware version into the drive's RAM.
- Rebuild the translator, then image the data with a Data Extractor task.
NVMe Controllers (SM2262EN, SM2263XT, SM2269XT)
- Plug the drive into Port 0 of the PC-3000 Portable III through the M.2 NVMe adapter.
- Power the drive on and run the Universal Utility. If the ID and capacity come back wrong, that points to corrupted firmware.
- Pick the Silicon Motion (NVMe) utility.
- Short the safe-mode pins the utility points to, and remove the short when it tells you to.
- Upload the loader into the drive's RAM with its background processes switched off, TRIM included, and let safe mode initialize.
- Build the virtual translator, then image the data with a Data Extractor task.
Equipment Used
- PC-3000 SSD
- PC-3000 Portable III
- PC-3000 SSD Silicon Motion utility
- Hakko FM-2032 microsoldering iron
- FLIR thermal camera
- Atten 862 hot air rework station
Safe Mode Entry
When a Silicon Motion controller boots normally, it reads firmware from the NAND flash chips. If that firmware is corrupted, the controller enters a panic loop: it reads corrupt data, fails initialization, resets, and tries again. The drive never becomes accessible.
Shorting the ROM pins breaks that loop and puts the controller in Safe Mode. With those test points shorted, the controller can't reach the NAND chips or its internal firmware. It runs from its own CPU and RAM, and the corrupted firmware never loads.
ACE Lab says the safe-mode pins on SM2258XT and SM2259XT boards are usually marked ROM. We bridge them with tweezers while the drive gets SATA power. On NVMe drives we hold the short until the PC-3000 utility says to remove it, and that comes before the loader upload.
Loader Matching: Why SM2258XT Requires an Exact Firmware Match
ACE Lab's loaders for the SM2246XT, SM2256K, SM2260G, SM2262ENG, and SM2263XT work regardless of firmware version or NAND chip ID. The SM2258XT and SM2259XT are different. Recovery on these controllers requires an exact tripartite match: the controller unit, the NAND memory chip ID, and the internal firmware version.
The NAND chip ID identifies the specific flash technology on the board (e.g., SanDisk 64-layer BiCS3 TLC). If the loader doesn't match the firmware version, the utility shows a wrong-firmware message or a lot of ECC errors while it reads the NAND.
PC-3000's Silicon Motion utility includes a database of loader profiles indexed by controller, NAND ID, and firmware version. Once the utility initializes the drive, it shows the NAND chip ID and suggests the loader that matches. If it can't pick one on its own, we select the loader by hand. ACELab updates this database with new controller and NAND combinations as they appear in the market.
Firmware BSY vs Controller Death: How to Tell the Difference
Before starting ROM pin shorting or loader injection, the recovery engineer determines whether the controller is alive. A drive stuck in firmware BSY and a drive with a dead controller both appear non-functional to the end user, but the recovery paths diverge.
- Firmware BSY (Recoverable via PC-3000)
- The controller is electrically functional but stuck in an infinite initialization loop because it cannot read valid firmware from NAND. ROM pin shorting forces the controller out of the loop into Safe Mode, where the loader can be injected.
- Controller Death (Board Repair Required First)
- PC-3000 cannot communicate with the controller. Board-level component repair with a Hakko FM-2032 microsoldering iron must restore electrical function before firmware recovery can begin. SATA board repair: $450–$600. NVMe: $900–$1,200.
What Does the PC-3000 Loader Do?
Once the controller is in Safe Mode, PC-3000 pushes a proprietary microcode loader (LDR) into the controller's volatile RAM. The controller's internal processor executes this loader directly from RAM, bypassing the corrupted firmware that was stored in NAND.
The loader has every background process switched off, TRIM included. No blocks are erased, no pages are relocated, and no stale data is purged while the extraction runs.
SM2259XT's ROM Mode and Firmware Panic
When the SM2259XT detects unrecoverable firmware corruption, it drops its consumer model name and reports its silicon descriptor (e.g., "SM2259XT") or a diagnostic capacity of 0GB in BIOS.
Whether the SM2259XT shows its silicon name or 0GB, recovery is the same PC-3000 procedure. We short the ROM pins to break the panic loop, run a loader through the Silicon Motion utility, and rebuild the FTL from the NAND metadata that survived.
Related: SATAFIRM S11 recovery (Phison PS3111) | SSD firmware corruption overview
Can Data Be Recovered from a Formatted Silicon Motion SSD?
Sometimes, but only if the drive hasn't erased the old data yet. A quick format makes the SSD erase its translator. Every read comes back as zeros, even though the old data is still sitting in the NAND. Then, as long as it has power, the drive erases that data in the background.
If the drive stays powered off after the format, the old data stays in the NAND. On a drive PC-3000 SSD supports, we can stop that background erase by shorting the drive into safe mode before it runs.
Then we rebuild the translator from older copies of it that are still on the NAND, so it matches the way it was before the format. This is a time-critical procedure. Success depends on how long the drive sat powered after formatting and whether background garbage collection had time to erase the physical blocks.
If the drive was formatted weeks ago and has been in normal use since, garbage collection has almost certainly erased the old data physically. No software and no lab can reverse a hardware-level NAND erase. Recovery is only possible on drives that were powered down quickly after formatting or that had TRIM disabled.
For the broader service overview, see our SSD data recovery service.
SM2262EN NVMe Recovery
The SM2262EN is a high-performance NVMe Gen3 controller with 8 NAND channels. Unlike budget DRAM-less controllers, the SM2262EN features onboard DRAM.
When the SM2262EN enters a locked state from FTL corruption, the drive reports a wrong capacity. It may appear in your system with its factory silicon descriptor ("SM2262EN") rather than the consumer brand name. PC-3000 accesses Safe Mode through ROM pin shorting, then injects the SM2262EN's loader to bypass the firmware panic and provide direct NAND access.
SM2269XT: Gen4 Speed on a DRAM-less Budget
The SM2269XT is Silicon Motion's 12nm Gen4 NVMe controller. It delivers PCIe 4.0 transfer speeds without onboard DRAM, relying entirely on HMB for FTL caching.
SM2263XT: Budget NVMe HMB Failures
The SM2263XT is a 4-channel PCIe Gen3 x4 controller with no DRAM of its own. It's built for Host Memory Buffer, so it caches its Flash Translation Layer in your computer's RAM. Power loss severs the PCIe link mid-update, causing firmware panic. Recovery follows the standard PC-3000 SSD path: safe mode entry, loader injection, & FTL reconstruction from NAND metadata.
Common drives using the SM2263XT include the HP EX900 & Lexar NM600. These are all budget NVMe designs that trade onboard DRAM for cost savings. We recover these with PC-3000 SSD's Silicon Motion utility.
Board-level repair for a dead PMIC or shorted rail runs $900–$1,200. SSD data recovery service covers the broader NVMe scope.
SM2267XT: PCIe Gen4 HMB on a Budget
The SM2267XT is a DRAM-less PCIe Gen4 x4 NVMe 1.4 controller. It runs four NAND channels at 1,200 MT/s and relies entirely on Host Memory Buffer for FTL caching.
A power cut during a heavy write severs the PCIe link and destroys the in-flight FTL state. The drive reboots with a corrupted L2P and enters firmware panic. Common drives using the SM2267XT include the Kingston NV2 (some batches).
Recovery pricing follows the NVMe tiers, starting at $200. SSD data recovery service covers the broader NVMe scope.
Where Does the FTL Live: Base SM2267 vs the XT Variants?
Short answer
The base SM2267 holds the active L2P translator in an onboard DRAM cache chip. The DRAMless SM2267XT & SM2269XT borrow host system RAM through Host Memory Buffer instead. On both, the only persistent copy of the map sits in the NAND service area; DRAM & HMB are volatile working caches that vanish on power loss, not the source of truth.
Both designs run PCIe Gen4 x4 across 4 NAND channels at capacities up to 4 TB, but the translator's working location splits them. The base SM2267 stages L2P updates in a dedicated DRAM die soldered next to the controller. The XT suffix removes that die: the SM2267XT & SM2269XT are DRAMless & map a slice of the host's own RAM over PCIe through Host Memory Buffer to hold the same working set. HMB is an NVMe-only mechanism; a SATA controller has no equivalent. The SM2269XT clocks NAND up to 1,600 MT/s & the SM2267 family up to 1,200 MT/s, so the XT parts move data fast while leaning on a borrowed, volatile cache.
Neither cache is where your data's address map permanently lives. The controller periodically checkpoints the L2P to system blocks in NAND. When a drive boots, it loads that on-NAND copy into DRAM or HMB & works from the fast copy. That distinction is what makes recovery possible after the cache is gone.
| Feature | Base SM2267 | SM2267XT / SM2269XT |
|---|---|---|
| Active L2P / FTL cache | Onboard DRAM die | Host RAM via HMB (DRAMless) |
| Persistent FTL copy | NAND service / spare area | NAND service / spare area |
| Interface / channels | PCIe Gen4 x4, 4-channel | PCIe Gen4 x4, 4-channel |
| PC-3000 SSD firmware recovery | Not offered; board-level repair only | Supported (matched loader, ROM-pin safe mode) |
| Example drives | DRAM-cached Gen4 client builds | Kingston NV2, ADATA Legend 800, Legend 850 Lite |
What Happens When the HMB Working Set Is Lost on Power Failure
When an SM2267XT or SM2269XT loses power, the borrowed host-RAM copy of the L2P evaporates with the system's RAM. The NAND cells still hold every byte of user data; only the volatile address map is gone. On the next boot the controller reaches for its on-NAND FTL backup, finds it stale or torn from the interrupted write, & drops into firmware panic. The drive then reports its raw silicon descriptor, 0 bytes, or refuses to enumerate to the host at all.
The recovery does not chase the dead host-HMB state, because that data was never persistent. We rebuild the L2P from what survived in NAND.
How PC-3000 SSD Handles the Supported XT Variants
On the supported SM2267XT & SM2269XT, we short the ROM test points on the PCB to put the controller in safe mode. Then we put a loader matched to the controller into its RAM. With the loader running, PC-3000 SSD rebuilds the translator. NVMe firmware recovery along this path runs $900–$1,200 (3-6 weeks). Rush handling is +$100 rush fee to move to the front of the queue.
Base SM2267: board-level repair only
The base DRAM-equipped SM2267 is not in the PC-3000 SSD supported matrix. Rossmann does not currently offer in-lab recovery for SM2267. For this part the only work we take on is board-level electrical repair (replacing a shorted PMIC, blown LDO, or failed capacitor); there is no firmware loader or FTL-reconstruction path on the base silicon. The DRAMless SM2267XT & SM2269XT, by contrast, get the full supported PC-3000 SSD recovery path described above. Confirm which variant is on the board by reading the controller die marking under magnification, since it changes whether the drive is firmware-recoverable at all. See our SSD data recovery service for the broader scope.
Silicon Motion SSD Recovery FAQ
Why are DRAM-less Silicon Motion SSDs more vulnerable to data loss?
What does it mean when my SSD shows its controller name in BIOS?
How much does Silicon Motion SSD data recovery cost?
Can recovery software fix a Silicon Motion SSD stuck in BSY state?
Is it safe to use MPTool on a Silicon Motion SSD?
Can a sudden power outage permanently damage my Silicon Motion SSD?
Why does SM2258XT recovery require an exact loader match?
Why can't I just clone a failing SM2259XT with a SATA dock?
How long does Silicon Motion SSD recovery take at Rossmann?
Can data be recovered from a formatted Silicon Motion SSD?
What should I do immediately when my Silicon Motion SSD stops being detected?
How do I know which Silicon Motion controller is in my SSD?
My drive shows SATAFIRM S11. Is that a Silicon Motion controller?
Which consumer SSDs use the SM2263XT controller?
What does it mean to short ROM pins on a Silicon Motion SSD?
What is the difference between SATAFIRM S11 and a Silicon Motion BSY hang?
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