[Discuss] More ZFS Questions

[kentborg at borg.org (Kent Borg)]

More ZFS questions, if I may.

Is this a sensible command to make a two-disk mirror?

 ? # zpool create mail-mirror? -f -O compression=on mirror sda2 sdb2

Am I violating some basic dictate by not doing whole disk? Am I doing 
anything else wrong there?

Because after I did this, I started a torture test:

 ? # rsync -a /usr usr1 &

And I did 8-copies of that (different digit for each).

After a few minutes (before any have finished):

 ? root at la:/mail-mirror# zpool status
 ??? pool: mail-mirror
 ?? state: DEGRADED
 ? status: One or more devices are faulted in response to persistent errors.
 ????????? Sufficient replicas exist for the pool to continue 
functioning in a
 ????????? degraded state.
 ? action: Replace the faulted device, or use 'zpool clear' to mark the 
device
 ????????? repaired.
 ? config:

 ????????? NAME???????? STATE???? READ WRITE CKSUM
 ????????? mail-mirror? DEGRADED???? 0???? 0???? 0
 ??????????? mirror-0?? DEGRADED???? 0?? 440???? 0
 ????????????? sda2???? DEGRADED???? 0?? 448???? 0? too many errors
 ????????????? sdb2???? FAULTED????? 0??? 55???? 0? too many errors

Suggestions?


Thanks,

-kb, the Kent who notes the above is all on a Raspberry Pi 4.