[lustre-discuss] Recovering MDT failure

[Ramiro Alba Queipo]

Andreas,

Thank you very much for your answer. It helps a lot.

Regards

On Fri, 28 Apr 2023 at 13:34, Andreas Dilger <adilger at whamcloud.com> wrote:

> On Apr 27, 2023, at 02:12, Ramiro Alba Queipo <ramiro.alba at upc.edu> wrote:
>
>
> Hi everybody,
>
> I have lustre 2.15.0 using Oracle on servers and Ubuntu 20.04 at clients.
> I have one MDT on a raid 1 SSD and the two disk have failed, so all the
> data is apparently lost.
>
> - Is there a remote posibility to access data on OSSTs without MDT?
> - When I started this system I tried to backup MDT data without succes. I
> there any procedure to backup data which I got, but also to recover it
> which I did not achieve?
>
> Any help/suggestion es very welcomed
> Thanks in advance.
>
> Regards
>
>
> Depending on the file layout used, the files on the OSTs are "just files",
> if you can mount the OSTs as type ldiskfs (or ZFS if that is the way you
> configured it).  The default file layout is one OST stripe per file, so you
> could read those files, and the UID/GID/timestamps should be correct, but
> there will not be any filenames associated with the files.
>
> Regards, Andreas
> --
> Andreas Dilger
> Lustre Principal Architect
> Whamcloud
>
>
>
>
>
>
>
>

-- 
Ramiro Alba

Centre Tecnològic de Tranferència de Calor
http://www.cttc.upc.edu

Escola Tècnica Superior d'Enginyeries
Industrial i Aeronàutica de Terrassa
Colom 11, E-08222, Terrassa, Barcelona, Spain
Tel: (+34) 93 739 8928
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