SSD not detected after sleep mode

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   NVMe SSD in M2_2 slot not detected after sleep mode

MB: ASRock Z370 Extreme4
BIOS version: 4.21B
M2_1 slot: Samsung SSD 990 EVO Plus 1TB
M2_2 slot: Samsung SSD 990 EVO Plus 1TB

I have 2 identical M2 SSD drives in M2_1 and M2_2. I have no other driver connected in this PC.
When I resume Window 11 from sleep, only one drive shows up, the one in M2_1. The second M2 is not recognized at all. Even if I restart the computer, the M2_2 slot is still dead. I have to completely shut down and then the M2_2 drive shows up in BIOS.

I tried disabling Deep Sleep in BIOS but it did nothing.

Looked for a new BIOS version, but couldn?�t find one.

If someone can help with this, I would greatly appreciate.

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ags1905 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 23 Sep 2025 Status: Offline Points: 15	Post Options Post Reply Quote ags1905 Report Post Thanks(0) Quote Reply Topic: SSD not detected after sleep mode Posted: 23 Sep 2025 at 12:50am
	NVMe SSD in M2_2 slot not detected after sleep mode MB: ASRock Z370 Extreme4 BIOS version: 4.21B M2_1 slot: Samsung SSD 990 EVO Plus 1TB M2_2 slot: Samsung SSD 990 EVO Plus 1TB I have 2 identical M2 SSD drives in M2_1 and M2_2. I have no other driver connected in this PC. When I resume Window 11 from sleep, only one drive shows up, the one in M2_1. The second M2 is not recognized at all. Even if I restart the computer, the M2_2 slot is still dead. I have to completely shut down and then the M2_2 drive shows up in BIOS. I tried disabling Deep Sleep in BIOS but it did nothing. Looked for a new BIOS version, but couldn?�t find one. If someone can help with this, I would greatly appreciate.