railz1 resilvering time keeps growing

[rcd]

Today I shut down my PVE, apparently without problems, but when I switched it on again half an hour later I got a lot of zfs errors, and zpool status now shows longer and longer time "to go":

# zpool status
  pool: poolz
 state: DEGRADED
status: One or more devices is currently being resilvered.  The pool will
        continue to function, possibly in a degraded state.
action: Wait for the resilver to complete.
  scan: resilver in progress since Tue Feb  1 16:57:07 2022
        1.26T scanned at 2.72G/s, 894G issued at 1.88G/s, 11.6T total
        8K resilvered, 7.51% done, 01:37:41 to go
config:

        NAME                        STATE     READ WRITE CKSUM
        poolz                       DEGRADED     0     0     0
          raidz1-0                  DEGRADED     0     0     0
            wwn-0x50014ee20fb7a683  DEGRADED     0     0 9.72K  too many errors
            wwn-0x5000c500c5097235  UNAVAIL    191   267     1  (awaiting resilver)
            wwn-0x5000c500c5060646  DEGRADED     0     0 9.74K  too many errors  (resilvering)
            wwn-0x5000c500c50451ee  DEGRADED     0     0 18.3K  too many errors  (resilvering)
            wwn-0x5000c500c504134c  DEGRADED     0     0 9.72K  too many errors

errors: 8150 data errors, use '-v' for a list

What happened here?

Will it ever recover? I have full backups, so I could rebuild the system if need be, but if it's just a matter of being patient I guess I'll just wait it out. At least if it isn't a matter of days before it completes?

 

[Dunuin]

I don't see the problem. With raidz1/2/3 and alot of HDDs its not unusual that a resilver might take days or even weeks to finish. In contrast to that your pool resilvers lightnig fast.

 

[rcd]

Hm, this is interesting. Seems the second drive in the raidz array had been knocked out by a USB attached backup drive that wanted to use the same drive id. I removed the USB drive and restarted the server and then the missing drive was there and the pool could get started.

After that the resilver completed within a few hours and I could clear the pool.