Re: Linux RAID autodetect partitions go missing from /dev, but fdisk can see them

Tor Arne Vestbø wrote:

The original array had sd[bcde]1 + sdf1 as spare. Then sdb1 went missing
and the spare kicked in, and then sdc1 went missing, leaving me with a
degraded array.

FYI, I decided to delete the Linux auto-detect partition on /dev/sdb so
I could re-create it and add /dev/sdb1 to the array again, so I at least
have four drives and not a degraded array (don't want to lose all my data).

This worked fine; after fdisk'ing /dev/sdb, deleting the partition and
recreating it with the same parameters is showed up as /dev/sdb1, and I
was able to add it to the array using mdadm /dev/md0 -a /dev/sdb1. The
array is now rebuilding.

We still have /dev/sdc1 as a test-case though, so the original problem
is still there, just not for two drives but for one. I would really like
to figure out why it's happening, so that suddenly it does not happen to
two drives at the same time, rendering my array dead :/

Tor Arne
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