So to try and fix some unrelated issue, I did a full reset of my BIOS and after reboot, Unraid seams to have forgotten my disk assignment. My setup is pretty simple, so this might help my case. I have a total of 5 drives, with 2 identical NVMEs making the first ZFS pool (a mirror) and 3 identical HDDs making the second ZFS pool (a raidz1). All drive are seen by the OS and selectable in the drive assignment field. The 2 pools have kept their name but when I click on them, it looks like all their settings are set to defaults as if I had just created them and not configures them yet. I do not have any screenshots of my previous config or any backup of my USB key. (that will teach me..)

I have not mounted anything yet as I'm scared I will lose data.

Tried a few things with ChatGPT but it was unsuccessful

making sure my sata controller was set to AHCI (it already was)

"zpool import" returns "no pools available to import"

looking at my /config/super.dat the was only a little bit of unreadable gibberish

If someone could help me with this, it would be greatly appreciated, as I really don't want to lose any data.

Post the diagnostics and the output from blkid

I Also just noticed my server lost its name to the default "Tower"

tower-diagnostics-20250524-1056.zip

and blkid:

root@Tower:~# blkid

/dev/sda1: LABEL_FATBOOT="UNRAID" LABEL="UNRAID" UUID="1302-2448" BLOCK_SIZE="512" TYPE="vfat" PARTUUID="25a917b2-01"

/dev/loop1: BLOCK_SIZE="131072" TYPE="squashfs"

/dev/nvme0n1p1: UUID="346f7d81-61eb-47d7-993b-35b4a82c56fb" TYPE="crypto_LUKS" PARTUUID="b47ca655-3a07-43b9-8ead-e386ef987a71"

/dev/sdd1: UUID="66289b87-88ec-4c31-97f9-79f8295fa1ae" LABEL="WD-WCC4N3YT8ASU" TYPE="crypto_LUKS" PARTUUID="84048752-dda1-4aad-9cf9-52a5b02b061a"

/dev/sdb1: UUID="45f1a94c-dfb5-442b-9075-8ff88ca29df6" TYPE="crypto_LUKS" PARTUUID="706617d8-e1e1-4b95-ab00-2abcfd1404ba"

/dev/loop0: BLOCK_SIZE="131072" TYPE="squashfs"

/dev/sdc1: UUID="962be034-3557-4925-9d72-a3b4dce8fb17" TYPE="crypto_LUKS" PARTUUID="60b2b355-2618-4e26-9123-b82192f0776f"

/dev/nvme1n1p1: UUID="5b5b5acf-a9e5-4680-881e-d8457b8ec33c" TYPE="crypto_LUKS" PARTUUID="c2715c4d-e81b-47c9-8174-a3cb18f872a3"

17 hours ago, schlatrice said:

I Also just noticed my server lost its name to the default "Tower"

That suggests a flash drive problem, do you have a recent backup?

Pool is encrypted, that why zpool import doesn't show anything, if you don't have a flash backup, you can just create a new config and reassign the devices, pool is easy, if you need help with the array devices see:

https://docs.unraid.net/unraid-os/manual/changing-the-flash-device/#what-to-do-if-you-have-no-backup-and-do-not-know-your-disk-assignments

Any doubts, please ask before trying.

11 hours ago, JorgeB said:

That suggests a flash drive problem, do you have a recent backup?

Pool is encrypted, that why zpool import doesn't show anything, if you don't have a flash backup, you can just create a new config and reassign the devices, pool is easy, if you need help with the array devices see:

https://docs.unraid.net/unraid-os/manual/changing-the-flash-device/#what-to-do-if-you-have-no-backup-and-do-not-know-your-disk-assignments

Any doubts, please ask before trying.

Awesome so I just need to setup my pools with the same settings and reassign the drives and everything should just work? The order of the 3 drives doesn't matter for the raidz1 pool?

12 hours ago, schlatrice said:

Awesome so I just need to setup my pools with the same settings and reassign the drives and everything should just work? The order of the 3 drives doesn't matter for the raidz1 pool?

Correct to both.

It took me some time to get to it but I followed your instructions and everything worked. Thank you so much for the help! ☺️ @JorgeB