If Intel VMD enabled, Intel 905p dissapears

[MasterJubei]

Hi,

Motherboard: TUF GAMING Z790-PLUS WIFI

Bios: 1663

Intel RST Driver on bios: 20.1.0.5817 RST VMD Driver (Shows up as INTERNAL USE DBG)

When VMD is disabled: All drives show up, NVME, Optane, SATA.

When VMD enabled:

1. Older bios, 905P shows up and can be put in a RAID array if desired.

However, Windows cannot see the 905P even when the RST driver is loaded. The NVME drives show up when the RST driver is loaded in the install.

2. With this current bios, the 905P does not show up in the BIOS at all.

Somewhere there is a bug, so how can I get the 905P detected when VMD is enabled?

[pressed_for_time]

This is an ASUS BIOS issue so you should address this to ASUS Technical Support.

[MasterJubei]

It's possible it's on their end, but I am suspicious it's an RST module issue.

As updating the BIOS updated the intel RST module version, and it's only when VMD Is enabled that the drive disappears.

[SteveTzeng]

I have exactly same issue.

Motherboard: MSI Z690 Tomahawk Wifi

BIOS: 7D32vHK

Intel RST Driver on bios: 20.1.0.5751

I contacted MSI support.

What they reply was "905P will never be supported/identified as physical disk in VMD driver v20 or newer" and told me to use other SSDs for VMD, though i can't accept this kind of answer.

Hint: There is an BIOS option called "Enable/Disable Global Mapping" in VMD setting, you can disclude chosen SSD from VMD.

[MasterJubei]

Looks like on ASUS's BIOS I can only do it by group. I only have two options, NVME and SATA. NVME seems to always include the 905P.

Regardless, this seems to be more of an Intel issue. I shouldn't have to exclude it.

[SteveTzeng]

Just looked your mb's BIOS manual, maybe its ASUS's bios capability limit.

(Finally, one pebble MSI superior to ASUS...)

I remembered something before when I tried to update Windows VMD driver from 19.5.5.1052 to 20.1.0.1015, but I got BSOD: Inaccessible Boot Device after reboot.

Maybe its a sign of this issue, and maybe its not a bug.

So I decided to disclude 905P from VMD and reinstall OS, cause 0x12b was too important.