The raid was a degraded raid 6 array of 5 disks with one missing disk, so only one parity disk, "[UUUU_]" in /proc/mdstat
There was a malfunction in the hard drive enclosure so that it momentarily lost contact with the 4 active disks, and then /proc/mdstat said "[_____]", meaning no disks at all. I'm not sure if --re-add is supposed to work in this scenario, however --stop and --assemble worked fine. Thank you for your help! / C On Thu, May 14, 2015 at 8:07 AM, NeilBrown <[email protected]> wrote: > On Wed, 13 May 2015 11:22:47 +0200 Christoffer Hammarström > <[email protected]> wrote: > > > Yes, i'm sorry, i thoughtlessly ran > > > > mdadm --stop /dev/md/storage > > > > before reporting the bug. > > Well that explains some of it. I'd really like to know what the state of > the > array was when mdadm crashed - that code path should hardly ever be > reached. > > Anyway, the fix is at: > > > http://git.neil.brown.name/?p=mdadm.git;a=commitdiff;h=2609f339028a6035a3fadb1190b565438000e35c > > in case the Debian maintainer wants to pick it up. > > Thanks for the report. > > NeilBrown > > > > > I managed to reassemble the raid later with --assemble. > > > > / C > >
