Help Needed: Unable to Import ZFS Pool 'dob' - I/O Error

[danob312]

Hi unraid-

I'm experiencing an issue with my Unraid setup and need some assistance. I'm currently unable to import my ZFS pool named 'dob' due to an I/O error. Here are the details of the situation:

System Details:
- Unraid version: [Your Unraid version]
- ZFS version: [Your ZFS version]
- Hardware:
  - NVMe devices used in the pool:
    - /dev/nvme1n1
    - /dev/nvme0n1

Problem Description:

When I attempt to import the 'dob' pool, I receive the following error:

root@Tower:~# zpool import dob
cannot import 'dob': I/O error
        Destroy and re-create the pool from
        a backup source.

I also tried to import the pool in readonly mode to get more details, but encountered the same error:

root@Tower:~# zpool import -o readonly=on dob
cannot import 'dob': I/O error
        Destroy and re-create the pool from
        a backup source.

Steps Taken So Far:

1. Listed available pools:

root@Tower:~# zpool import
   pool: dob
     id: 10658759146814266625
  state: ONLINE
 action: The pool can be imported using its name or numeric identifier.
 config:

        dob            ONLINE
          mirror-0     ONLINE
            nvme1n1p1  ONLINE
            nvme0n1p1  ONLINE

   pool: backup
     id: 17684685815862398316
  state: ONLINE
 action: The pool can be imported using its name or numeric identifier.
 config:

        backup      ONLINE
          nvme2n1   ONLINE

2. Attempted to import the pool:

root@Tower:~# zpool import dob
cannot import 'dob': I/O error
        Destroy and re-create the pool from
        a backup source.

3. Attempted readonly import:

root@Tower:~# zpool import -o readonly=on dob
cannot import 'dob': I/O error
        Destroy and re-create the pool from
        a backup source.

Next Steps:

To further diagnose the issue, I need to check the health of the NVMe devices. Here are the SMART reports:

SMART Report for /dev/nvme1n1:

[Insert smartctl -a /dev/nvme1n1 output here]

SMART Report for /dev/nvme0n1:

[Insert smartctl -a /dev/nvme0n1 output here]

Request for Assistance:

- What steps can I take to try and recover the 'dob' pool without destroying and recreating it?
- Are there any specific diagnostic commands or tools I should use to further investigate this issue?
- Has anyone experienced a similar issue and found a solution?

Thank you for your help!

tower-diagnostics-20240616-1423.zip

[JorgeB]

If the pool doesn't import read-only you will probably will need to destroy and recover from a backup., was this a stripe or mirror?