this post was submitted on 12 Apr 2025
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NMVE offline after suspend (lemm.ee)
submitted 4 weeks ago* (last edited 4 weeks ago) by [email protected] to c/[email protected]
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So...I just purchased a brand new WD black SN850X 2TB to store a bunch of games. I installed it on my last NVME slot available no my motherboard, M2C_SB, which I understand doesn't directly plug into the CPU but onto the motherboard's southbridge. Not sure if this has any reason for the issue. So, the problem is...whenever the PC suspends (which, by the way, it can go suspended even in the middle of a file transfer...not sure why KDE won't block that)...anyway, after a suspension, that drive is missing. Checking any partition manager, it shows the NVME drive is still somewhat there, but with no partitions listed. There's an error 'partition xxxx is not properly aligned". It seems my only option is a reboot. After the reboot, the drive is fine, it's properly mounted, shows correctly the partition in the disk manager, and runing a check finds no errors. Mind you, there's 3 NVME drives plugged, only this last one is giving me headaches after suspension.

...what's causing this? And how can I avoid it?

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[–] [email protected] 4 points 4 weeks ago (2 children)

Update your bios, or hope for an update to your bios if you're up to date. I had similar behavior with an sn850x 4tb on a new system with 2 of them. As soon as I got my motherboard up to date, the problems ended.

[–] [email protected] 3 points 3 weeks ago

Just revisiting this, as I didn't have time to try reopening the case until today - busy week! I swapped The NVMEs between M2B_CPU and M2C_SB. I did nothing else here. But after a couple of suspends (a quick one, and then the automatic one when I leave the PC overnight), neither of the drives has gone offline. At least...for now.

[–] [email protected] 2 points 4 weeks ago

Thanks...I just updated the week prior to receiving the SSD, in order to be sure I didn't have any compatibility issues...So I guess I'm SOL on that end.