SSD Controller Technical Reference
WD/SanDisk Polaris MP16+ Controller Reference
The WD Black SN770 uses a proprietary SanDisk Polaris MP16+ tri-core controller with a DRAM-less HMB design and a hardcoded 64MB HMB ceiling. WD's proprietary architecture limits third-party recovery tool development; no dedicated PC-3000 Active Utility exists. Under rapid write/erase cycles or unexpected power loss, the rigid HMB allocation fails to flush to NAND, virtually guaranteeing severe FTL corruption. ACELab's PC-3000 SSD supported-controller list does not currently cover this controller. For context on the SSDs we do recover, see our SSD data recovery page.
WD/SanDisk Polaris MP16+ is not on the current PC-3000 SSD supported-controller list
WD/SanDisk Polaris MP16+ does not appear on the current ACELab PC-3000 SSD supported-controller list (PC-3000 SSD / PC-3000 SSD Extended 3.8.10) as of 2026-05-12. Case-by-case feasibility only. Contact us before shipping anything and we will tell you in writing whether we can do anything for your specific drive.
Source of truth: ACELab PC-3000 SSD supported-drives list. Internal evidence file: src/lib/ssd-support-matrix.ts.
WD/SanDisk Polaris MP16+ Specifications
| Manufacturer | Western Digital |
| Interface | NVMe Gen4 |
| NAND Types | 3D TLC |
| DRAM Cache | No (DRAM-less) |
| Channels | 4 |
| PC-3000 Support | Limited / Generic NVMe |
| Chip-Off Viability | Not viable (AES-256 hardware encryption) |
WD proprietary architecture limits third-party tool support. Tri-core, no hardware AES-256 encryption.
Affected SSD Models
The WD/SanDisk Polaris MP16+ is deployed in the following consumer drives. A failure in this controller impacts access to the NAND flash on these specific models.
| # | Drive Model | Interface |
|---|---|---|
| 1 | WD Black SN770 | NVMe Gen4 |
| 2 | WD Blue SN580 | NVMe Gen4 |
Common Failure Modes and Symptoms
Each failure mode below describes a specific way the WD/SanDisk Polaris MP16+ fails and the symptoms you will observe. If your SSD matches any of these patterns, do not run recovery software; it cannot communicate with a dead controller. See the zero-byte SSD diagnostic reference for a deeper technical explanation of controller and FTL failures.
- WD Dashboard firmware corruption
Firmware corruption from WD Dashboard updates. WD's proprietary controller architecture limits third-party tool development; no dedicated PC-3000 Active Utility exists.
- Drive bricked after Dashboard update
- Firmware update failure
- SSD not detected after WD software update
- Drive shows 0 bytes after update attempt
- HMB FTL tearing from power loss
The SN770 stores its Flash Translation Layer in host system RAM via a rigid 64MB Host Memory Buffer allocation. Any system crash or power loss deallocates this RAM before the controller can write its mapping state to NAND, causing instant FTL corruption and PCIe bus lockups on subsequent boot.
- Drive disappeared after system crash
- PCIe bus lockup preventing system boot
- Windows shows Critical NVM Subsystem error
- Unknown Device in Device Manager
- BSOD trigger / system instability
When the SN770 firmware panics, it frequently triggers Windows Blue Screens of Death, specifically KERNEL_DATA_INPAGE_ERROR or CRITICAL_PROCESS_DIED. The drive may completely vanish from BIOS after the crash and report 0 bytes if it re-enumerates.
- KERNEL_DATA_INPAGE_ERROR BSOD
- CRITICAL_PROCESS_DIED BSOD
- Drive vanishes from BIOS after crash
- System cannot complete POST with drive installed
How Is Data Recovered from a Failed WD/SanDisk Polaris MP16+ SSD?
Data is recovered from a failed controller SSD by keeping the original board alive, reading controller state with PC-3000 SSD, and rebuilding the Flash Translation Layer from surviving NAND metadata. If firmware access requires Safe Mode or a volatile loader, that work happens before imaging. When the controller also handles decryption, chip-off returns unreadable data.
At our Austin, TX lab, the goal is to keep the original controller stable long enough to expose ROM state, firmware behavior, and NAND metadata without letting the drive keep writing to itself. Our SSD data recovery overview covers lab intake and triage, why SSDs report 0 bytes explains capacity failures, and how SSD controller encryption works explains why the original silicon matters.
- WD/SanDisk Polaris MP16+ failures usually break the Flash Translation Layer, firmware boot path, or local power rail before macOS or Windows sees a mountable volume. Symptoms such as Drive bricked after Dashboard update, Firmware update failure, SSD not detected after WD software update are useful to recognize, but on this controller they do not unlock a tooling path we can offer in-lab.
- WD/SanDisk Polaris MP16+ is not on ACELab's PC-3000 SSD supported-controller list (PC-3000 SSD / PC-3000 SSD Extended 3.8.10). Without firmware utility coverage, the controller's mapping tables, internal loader, and any factory diagnostic mode are inaccessible to us, which means no firmware-level recovery is on the table.
- WD/SanDisk Polaris MP16+ fuses AES-256 keys to the controller silicon, so desoldering the NAND chips returns ciphertext that cannot be decrypted without reviving the original controller through tooling we do not currently have for this controller.
Frequently Asked Questions
Can software recover data from a dead WD/SanDisk Polaris MP16+?
Why not use chip-off recovery on Western Digital SSDs?
Does Rossmann recover data from WD/SanDisk Polaris MP16+ drives?
Can you recover deleted files from a WD/SanDisk Polaris MP16+ SSD?
Have a WD/SanDisk Polaris MP16+ drive?
We do not currently offer in-lab recovery for WD/SanDisk Polaris MP16+ SSDs because the controller is not on ACELab's PC-3000 SSD supported-controller list. Contact us before shipping anything; we will confirm in writing what we can and cannot do for your specific drive.