On Sun, Mar 21, 2010 at 10:28 AM, Michael Evans <mjevans1983@xxxxxxxxx> wrote: > On Sat, Mar 20, 2010 at 8:01 PM, Shane W <shane-kernel@xxxxxx> wrote: >> Hello all, >> >> I am trying to convert a 5 disk raid5 array to a 6 disk >> raid6 but am having no luck. I first added the 6th disk as >> a spare then >> mdadm --grow /dev/md3 --level 6 >> mdadm level of /dev/md3 changed to raid6 >> mdadm: /dev/md3: Something wrong - reshape aborted >> mdadm: aborting level change >> >> dmesg doesn't show an error and neither does mdadm beyond >> "something wrong". Is this supported? >> >> mdadm 3.1.1 Linux 2.6.32.8 x86_64. >> >> Thanks, >> Shane +1 on the critical section backup And some bonus info: If you have a write-intent bitmap on the RAID5 array, you may have to get the bitmap out of the way of the reshape. This one got me for a while. (I'm not sure about all cases, but I believe you have to turn the bitmap off. I had an _internal_ bitmap, turned it off, and only then my reshape kicked into gear. Remember to turn it back on :) ) Good luck! -- Kristleifur -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
