Windows 24H2 + WD = blue screens

WD Internal Drives Internal Drives
41

Ah i’ve worked out how to set the HMB size to any value you want, i.e. back to 64MB for my SN770

Using this ASCII.jp：HMBはNVMe SSD低価格化の切り札!?東芝メモリ「BG4」で実力検証 (3/6) and google translate.

  1. Set HMBAllocationPolicy back to 2 (max / default)
  2. In device manager, under Disk drives find your affected drive. Right click Properties → Details tab and look at the parent property it’ll be like ‘PCI\VEN_15B7&DEV_5017&SUBSYS_501715B7&REV_01\4&333c8b5&0&0012’ you need to copy the VEN, DEV and REV parts. For my example it is ‘VEN_15B7&DEV_5017&REV_01’
  3. Back in regedit go to Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\stornvme\Parameters\Device
  4. Create a new multi string value called ‘HostMemoryBufferBytes’ with the value from 2. followed by a space then the size in bytes you want i.e. ‘VEN_15B7&DEV_5017&REV_01 67108864’
  5. Reboot

Easy :sweat_smile:

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