Hi,
When replacing a failed disk with a new one using --add, is it possible to
restart a partially-complete --add, e.g. after a reboot?
I have a raid-6 with a failed disk, and used --add to add a new disk as a
replacement. From /proc/mdstat, "finish" told me it would take around 24
hours to complete the add.
The machine was rebooted some hours into the add, and on restart the md
was missing the new disk (and the failed disk). I tried to --re-add the
new disk again, but mdadm told me it's "not possible":
mdadm: --re-add for /dev/sdh1 to /dev/md0 is not possible
I ended up --add'ing the disk again, so the 24 hours to complete started
again.
Is this expected, and/or is there a way to restart the --add rather than
starting from the beginning again?
$ mdadm --version
mdadm - v4.1 - 2018-10-01
Thanks,
Chris
