Bug#707330: linux-image-3.8-1-amd64: Update to 3.8 causes MD RAID1 failure

[Ben Hutchings <ben@decadent.org.uk>]

On Thu, May 09, 2013 at 09:07:35AM +0200, Stefan Fritsch wrote:
> Package: src:linux
> Version: 3.8.11-1
> Severity: important
> 
> I have two disks, one SSD and one HDD. There are to MD RAID1 volumes
> that each use one partition on the SSD and one on the HDD. 
> 
> After the first reboot with 3.8, MD kicked the HDD's partitions from
> both RAID devices.
[...]

This sounds like a known bug that is fixed in 3.8.12.  md will
send discard commands to both the SSD and the HDD, whereas it should
of course send them to the SSD only.

Are you are using btrfs or ext4 filesystems with the 'discard' option?
If so, does removing the option avoid this problem?

Ben.

-- 
Ben Hutchings
We get into the habit of living before acquiring the habit of thinking.
                                                              - Albert Camus