Public bug reported: Current version of mdadm doesn't have second fix for raid10. Mdmon is not able do handle end recovery if drive was disconnected while rebuild.
Steps to reproduce: 1. Create RAID10 and wait for resync. #mdadm --create /dev/md/imsm0 --metadata=imsm --raid-devices=4 /dev/sda /dev/sdb /dev/sde /dev/sdf –run #mdadm --create /dev/md/r10d4s64_A --level=10 --chunk 64 --raid-devices=4 /dev/sda /dev/sdb /dev/sde /dev/sdf –run 2. Degrade RAID 10 volume by disconnecting 2 drives. #mdadm -If sdb #mdadm -If sdf 3. Add spare drive. #mdadm --add /dev/md/imsm0 /dev/sdg 4. Wait for recovery start. 5. While rebuild, disconnect recovered member drive (spare added in step 4). 6. Add another spare drive. #mdadm --add /dev/md/imsm0 /dev/sdh 7. Wait for recovery start. Expected result: Recovery starts automatically. Actual result: Recovery does not start. Following fix resolves the issue: https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/commit/?id=a4e96fd8f3f0b5416783237c1cb6ee87e7eff23d ** Affects: mdadm (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1887640 Title: IMSM: finish recovery when drive with rebuild fails To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mdadm/+bug/1887640/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
