HI Cephers,

 I have an other question related to this issue, What would be the
procedure to restore a server fail (a whole server for example due to a
mother board trouble with no damage on disk).

Regards, I

2014-10-15 20:22 GMT+02:00 Daniel Schwager <daniel.schwa...@dtnet.de>:

> Loic,
>
> > >         root@ceph-node3:~#  smartctl -a /dev/sdd | less
> > >                 === START OF INFORMATION SECTION ===
> > >                 Device Model:     ST4000NM0033-9ZM170
> > >                 Serial Number:    Z1Z5LGBX
> > >
> ..
> > >         admin@ceph-admin:~/cluster1$ emacs -nw ceph.conf
> > >                 [osd.16]
> > >                         ...
> > >                         devs         =
> /dev/disk/by-id/scsi-SATA_ST4000NM0033-9Z_Z1Z5LGBX-part1
> > >
> >
> > I'm curious about what this is used for.
>
> The "normal" device path /dev/sdd1 can change dependent on the
> amount/order of disks/controllers. So, using the scsi-path (containing the
> serial number)  is always unique:
>
> root@ceph-node3:~# ls -altr /dev/sdd1
> brw-rw---T 1 root disk 8, 49 Okt 15 10:06 /dev/sdd1
>
> root@ceph-node3:~# ls -altr
> /dev/disk/by-id/scsi-SATA_ST4000NM0033-9Z_Z1Z5LGBX-part1
> lrwxrwxrwx 1 root root 10 Okt 15 10:06
> /dev/disk/by-id/scsi-SATA_ST4000NM0033-9Z_Z1Z5LGBX-part1 -> ../../sdd1
>
> regards
> Danny
>
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>
>


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