On Fri, 2013-05-10 at 08:59 +0200, Stefan Fritsch wrote: > On Thursday 09 May 2013, you wrote: > > On Thu, May 09, 2013 at 09:07:35AM +0200, Stefan Fritsch wrote: > > > 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? > > I am using ext4 but without either discard or nodiscard option. "grep > discard /proc/mounts" gives no output (when running 3.2). According to > the docs, nodiscard should be the default. So I guess it is not worth > the effort to test with an explicit "nodiscard". Or has the default > changed between 3.2 and 3.8? If so, Documentation/filesystems/ext4.txt > is out of date. Not that I'm aware. > More information which may or may not be helpful: md0 has ext4 on it > without LVM (root partition). md1 is a LVM pv. Anyway, I'm uploading 3.8.12 right now so you should be able to test whether that fix addresses the problem you're seeing. If not, then we should forward this upstream. Ben. -- Ben Hutchings For every action, there is an equal and opposite criticism. - Harrison
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