Windows 24H2 + WD = blue screens

WD Internal Drives Internal Drives
10

Anyone with BSOD issue, can you please try to disable HMB?

Steps below

  1. Open Registry Editor
  2. Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\StorPort
  3. Set HMBAllocationPolicy to 0. (If there is no HMBAllocationPolicy, create one as DWORD)
  4. Reboot

If system runs stable, I believe you need a repair installation afterwards.

  1. Start Menu → Settings
  2. System → Recovery
  3. Click the repair button to “Use Windows Update to Repair Computer”

If disabling HMB solves the problem, it means WD needs to release a new firmware with correct HMB table. Current HMB table indicates the SSD prefers 200MB system memory as cache. But from the other source, it seems SN770 originally only advertise 64MB HMB.

And, too bad, SN770 datasheet is no longer on WD website. So, we need WD to clarify what is the correct HMB size for SN770.

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