Pool showing offline - best way to bring online?


I have pool currently showing offline which is using disks from an ISCSI connection. It had been fine, but stopped during the night.

I can see the disks showing, and I can see all connected via an ISCSI to the host then connects into the TrueNAS VM.

Not sure where to start without damaging data?

Any help appreciated.


Output of zpool status poolname?
zpool online poolname should bring it back online if everything is ok.

Unfortunately the pool isn’t showing in zpool status

root@mrm-ctruenas[~]# zpool status
  pool: Plugins
 state: ONLINE
  scan: scrub repaired 0B in 00:00:01 with 0 errors on Sun Mar 24 00:00:01 2024

        NAME                                          STATE     READ WRITE CKSUM
        Plugins                                       ONLINE       0     0     0
          gptid/55578e4c-1ee9-11ed-ab80-00155d002614  ONLINE       0     0     0

errors: No known data errors

  pool: boot-pool
 state: ONLINE
status: Some supported and requested features are not enabled on the pool.
        The pool can still be used, but some features are unavailable.
action: Enable all features using 'zpool upgrade'. Once this is done,
        the pool may no longer be accessible by software that does not support
        the features. See zpool-features(7) for details.
  scan: scrub repaired 0B in 00:00:32 with 0 errors on Fri Apr 19 03:45:32 2024

That’s somewhere between “not a good idea” and “a fantastically terrible idea”, depending on how those extents are actually backed…

In any case, zpool import is probably the place to start, if the pool is not actually imported.

1 Like