Re: Raid5 to raid6 grow interrupted, mdadm hangs on assemble command

[Wols Lists <antlists@xxxxxxxxxxxxxxx>]

On 23/04/2023 20:09, Jove wrote:
> # mdadm --version
> mdadm - v4.2 - 2021-12-30 - 8
>
> # mdadm -D /dev/md0
> /dev/md0:
>             Version : 1.2
>       Creation Time : Sat Oct 21 01:57:20 2017
>          Raid Level : raid6
>          Array Size : 7813771264 (7.28 TiB 8.00 TB)
>       Used Dev Size : 3906885632 (3.64 TiB 4.00 TB)
>        Raid Devices : 4
>       Total Devices : 5
>         Persistence : Superblock is persistent
>
>       Intent Bitmap : Internal
>
>         Update Time : Sun Apr 23 10:32:01 2023
>               State : clean, degraded
>      Active Devices : 3
>     Working Devices : 5
>      Failed Devices : 0
>       Spare Devices : 2
>
>              Layout : left-symmetric-6
>          Chunk Size : 512K
>
> Consistency Policy : bitmap
>
>          New Layout : left-symmetric
>
>                Name : atom:0  (local to host atom)
>                UUID : 8c56384e:ba1a3cec:aaf34c17:d0cd9318
>              Events : 669453
>
>      Number   Major   Minor   RaidDevice State
>         0       8       33        0      active sync   /dev/sdc1
>         1       8       97        1      active sync   /dev/sdg1
>         3       8       49        2      active sync   /dev/sdd1
>         5       8       80        3      spare rebuilding   /dev/sdf
>
>         4       8       64        -      spare   /dev/sde

This bit looks good. You have three active drives, so I'm HOPEFUL your 
data hasn't actually been damaged.

I've cc'd two people more experienced than me who I hope can help.

Cheers,
Wol