[lustre-discuss] an OST is dead

[Colin Faber]

What does zpool status report?

On Mon, May 12, 2025, 2:41 AM Noskov, Dr. Sergey via lustre-discuss <
lustre-discuss at lists.lustre.org> wrote:

> Hi everyone,
>
>
>
> we have a problem and I would be very grateful for help or advice.
>
>
>
> We are using ZFS for metadata and object storage target in our Lustre. One
> of the pools is a draid3:12d:42c:2s-0 is became no longer importable after
> one of the disks failed.
>
>
>
> on startup zpool import:
>
>
>
> pool: l1fs-OST010b
>
>      id: 6548008278833985886
>
>   state: FAULTED
>
> status: One or more devices contains corrupted data.
>
> action: The pool cannot be imported due to damaged devices or data.
>
>    see: https://openzfs.github.io/openzfs-docs/msg/ZFS-8000-5E
>
>    ...
>
>
>
> the commands
>
>
>
> zpool import -f l1fs-OST010b
>
> zpool import -F l1fs-OST010b
>
> zpool import -F -X l1fs-OST010b
>
>
>
> yield:
>
> cannot import 'l1fs-OST010b': I/O error
>
>                 Destroy and re-create the pool from
>
>                 a backup source.
>
>
>
> zdb -e ends very quickly with the I/O error
>
> Some tool said there is missing metadata in the zpool.
>
>
>
> Does anyone have any productive advice for us other than what is on the
> website
>
> https://openzfs.github.io/openzfs-docs/msg/ZFS-8000-5E
>
> ?
>
>
>
> Now the question: how do we proceed if we have to reformat the OST?
>
> At the moment we see the plan as:
>
> Disable the broken OST (or is it possible to use the same name for OST?)
>
> create a new pool and integrate it into the Lustre
>
>
>
> What do we do with the files on the broken OST, can we just delete them
> now? Can the difference in metadata and object targets be repaired with
> Lustre-FSCK or somehow?
>
>
>
> Thanks in advance
>
>
>
> With best regards
>
>
>
> Sergey Noskov
>
>
>
>
> _______________________________________________
> lustre-discuss mailing list
> lustre-discuss at lists.lustre.org
> http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
>
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