Hi, i've seen this one or twice when booting my array. I get this notification event:

Event: Unraid Primary_cache disk message
Subject: Warning [NAS] - Cache pool BTRFS missing device(s)
Description: NE-1TB_2280_0025695000052 (nvme0n1)
Importance: warning

But it looks fine on the device page:

Logs for the drive (full diags attached)

text error warn system array login

Mar 20 17:15:13 nas kernel: nvme0n1: p1

Mar 20 17:15:30 nas emhttpd: online: NE-1TB_2280_0025695000052 (nvme0n1) 512 2000409264

Mar 20 17:15:30 nas emhttpd: import 32 pool device: (nvme0n1) NE-1TB_2280_0025695000052

Mar 20 17:15:30 nas emhttpd: read SMART /dev/nvme0n1

Mar 20 17:20:57 nas emhttpd: shcmd (377): /usr/sbin/cryptsetup luksOpen /dev/nvme0n1p1 nvme0n1p1 --allow-discards

Mar 20 17:21:02 nas emhttpd: import 32 pool device: (nvme0n1) NE-1TB_2280_0025695000052

Mar 20 17:21:06 nas emhttpd: #011devid 1 size 953.85GiB used 2.03GiB path /dev/mapper/nvme0n1p1

Mar 20 17:21:46 nas kernel: block nvme0n1: the capability attribute has been deprecated.

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BRTFS stats:

root@nas:~# btrfs dev stats /mnt/primary_cache

root@nas:~# btrfs dev stats /mnt/primary_cache

[/dev/mapper/nvme0n1p1].write_io_errs 0

[/dev/mapper/nvme0n1p1].read_io_errs 0

[/dev/mapper/nvme0n1p1].flush_io_errs 0

[/dev/mapper/nvme0n1p1].corruption_errs 0

[/dev/mapper/nvme0n1p1].generation_errs 0

[/dev/mapper/nvme3n1p1].write_io_errs 0

[/dev/mapper/nvme3n1p1].read_io_errs 0

[/dev/mapper/nvme3n1p1].flush_io_errs 0

[/dev/mapper/nvme3n1p1].corruption_errs 0

[/dev/mapper/nvme3n1p1].generation_errs 0

Is this safe to ignore or could it be a sign of an impending failure?

nas-diagnostics-20260320-1721.zip

Edited March 20Mar 20 by oliver

Its a weird and very rare quirk of one of the gui check scripts that can ocasionally happen when the array/pool start and it takes a tat too long while the drives are being decrypted.

Nothing to worry about.

Havent seen that in a couple versions, as it was spoken about in the past so interesting to know its still happening.


Edit:

I found it!

https://forums.unraid.net/topic/195209-unraid-os-version-721-available/#findComment-1591570

Edited March 20Mar 20 by Mainfrezzer