Trying to setup new Cache pool with 3x 4TB NVMe Drives in a ZFS Z1 Encrypted setup.

Edit: Version 7.1.4

I used this guide: https://forums.unraid.net/topic/170102-how-exactly-do-i-encrypt-replacement-cache-disks

It goes through all the motions, but then says "Unmountable: wrong or no file system".
I have used both zfs encryped and zfs unencrypted without success.

I'm not sure what else to do.

# zpool import

no pools available to import

Similar Topics:

https://forums.unraid.net/topic/193174-unmountable-error-with-zfs-nvme-cache-was-working-for-months-without-issue-no-recent-config-changes/#comment-1575896

https://forums.unraid.net/topic/193154-please-help-zfs-cache-pool-unmountable-wrong-or-no-file-system/#comment-1575827

https://forums.unraid.net/topic/193154-please-help-zfs-cache-pool-unmountable-wrong-or-no-file-system/#comment-1575732

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https://forums.unraid.net/topic/178927-unmountable-unsupported-or-no-file-system-for-cache-after-powerfailure/#comment-1483183

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Edited August 31, 2025Aug 31 by NathanR

Well... zfs unencrypted just worked. I simply formatted it a second time. (I have done this before with encrypted deployment).
I will delete and try again.

Okay so zfs encrypted with a short passphrase (as a test) worked.

Not sure what I did differently today vs last night?

I restarted unraid this morning.

Edit:
Using a full-long passphrase worked.

I guess a restart fixed it?

Dunno.

Was loosing hair last night.

Now for some speed tests :)

Edited August 31, 2025Aug 31 by NathanR