OSD recovery problem

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On 07/04/2014 03:18 PM, Loic Dachary wrote:
> Hi,
>
> I extracted a disk with two partitions (journal and data) and copied its content in the hope to restart the OSD and recover its content.
>
>     mount /dev/sdb1 /mnt
>     rsync -avH --numeric-ids /mnt/ /var/lib/ceph/osd/ceph-$(cat /mnt/whoami)/

I think you went wrong there, rsync man page:

-a, --archive               archive mode; equals -rlptgoD (no -H,-A,-X)
-X, --xattrs                preserve extended attributes

So you didn't copy over the xattrs, so basically the data is lost/unusable.

>     rm /var/lib/ceph/osd/ceph-$(cat /mnt/whoami)/journal
>     dd if=/dev/sdb2 of=/var/lib/ceph/osd/ceph-$(cat /mnt/whoami)/journal
>
> and then
>
>     start ceph-osd id=$(cat /mnt/whoami)
>
> It crashes on https://github.com/ceph/ceph/blob/v0.72.2/src/osd/PG.cc#L2182 and before it happens there is
>
>     load_pgs ignoring unrecognized meta
>
> and the full "debug osd = 20" logs are in http://paste.ubuntu.com/7746993/ and this is
>
> root at bm4202:/etc/ceph# dpkg -l | grep ceph
> ii  ceph                        0.72.2-1trusty     amd64              distributed storage and file system
> ii  ceph-common                 0.72.2-1trusty     amd64              common utilities to mount and interact with a ceph storage
> ii  python-ceph                 0.72.2-1trusty     amd64              Python libraries for the Ceph distributed filesystem
> root at bm4202:/etc/ceph# ceph --version
> ceph version 0.72.2 (a913ded2ff138aefb8cb84d347d72164099cfd60)
>
> Cheers
>
>
>
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> ceph-users at lists.ceph.com
> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
>


-- 
Wido den Hollander
42on B.V.
Ceph trainer and consultant

Phone: +31 (0)20 700 9902
Skype: contact42on


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