[Bug 1320402] Re: mdadm resyncs imsm raid in "Normal" state

[Sergio Callegari]

see also https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1587142

mdadm with imsm metadata seems to be completely broken in ubuntu.

Having something as common as RAID1 on Intel boards broken is not very
nice.

Until this can be fixed, it would be good to at least add a very visible
warning in the mdadm documentation and in the distro release notes.

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Title:
   mdadm resyncs imsm raid in "Normal" state

Status in mdadm package in Ubuntu:
  Confirmed

Bug description:
  Got an imsm raid1 which I don't boot from. Whenever bios reports the
  raid as being in "Normal" state, mdadm starts a resync of it after
  boot. If a resync already is underway (bios reports it as being in
  "Verify" state), it continues where it left off.

  This appears to be very similar to a problem in Fedora:
  https://bugzilla.redhat.com/show_bug.cgi?id=753335 It's apparently
  fixed there for some time now. (The workaround mentioned in comment 41
  in that ticket doesn't work in Ubuntu, but I guess that's due to
  distro differences in initramfs and systemd.)

  Using mdadm 3.2.5-5ubuntu4 in a fresh Trusty install.

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