Cannot recreate md1 if partitions (ie: md1p1, md1p2) detected

[Alvaro Uria]

distribution: trusty
package: partman-auto-raid
Version: 22ubuntu1
file: ./lib/partman/display.d/55initial_auto_raid_fs
function: fix_raid_fs
lines: 22-29

Hi,

On non-partitioned disks, partman-auto-raid worked perfectly fine for me. Re-installing just after previous install worked fine, too.

However, if one of the created raids gets partitioned (ie: md1p1, md1p2) and a re-install is run, partman-auto-raid fails with "Error: incorrect directory for /dev/md1".

By wiping disks partitions out (ie: dd if=/dev/zero of=/dev/sda ...), under partman/early_command, RAID is not detected and partman-auto-raid works again.

partman-auto-raid should automatically partition disks no matter their previous state.

Please let me know if you would require further details.

Cheers,
-Alvaro.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Igshaan Mesias (igshaan-mesias)]

Hi,

I had exactly the same behavour with 14.04 if any pre-existing raids were present.
Installer fails with: "partman-auto-raid: Error: incorrect directory for /dev/mdXXX"

I can only confirm that wiping disks with dd gets you passed this, however, using mdadm to zero the superblock instead may just work, I have not tested this.

Kind Regards,