Hi,
May or may not work depending on your JBOD and the way it's identified
and set up by the LSI card and the kernel:
cat /sys/block/sdX/../../../../sas_device/end_device-*/bay_identifier
The weird path and the wildcards are due to the way the sysfs is set up.
That works with a Dell R520, 6GB HBA SAS cards and Dell MD1200s, running
CentOS release 6.5.
Note that you can make your life easier by writing an udev script that
will create a symlink with a sane identifier for each of your external
disks. If you match along the lines of
KERNEL=="sd*[a-z]", KERNELS=="end_device-*:*:*"
then you'll just have to cat "/sys/class/sas_device/${1}/bay_identifier"
in a script (with $1 being the $id of udev after that match, so the
string "end_device-X:Y:Z") to obtain the bay ID.
Thanks,
JF
On 12/11/14 14:05, SCHAER Frederic wrote:
> Hi,
>
>
>
> I’m used to RAID software giving me the failing disks slots, and most
> often blinking the disks on the disk bays.
>
> I recently installed a DELL “6GB HBA SAS” JBOD card, said to be an LSI
> 2008 one, and I now have to identify 3 pre-failed disks (so says
> S.M.A.R.T) .
>
>
>
> Since this is an LSI, I thought I’d use MegaCli to identify the disks
> slot, but MegaCli does not see the HBA card.
>
> Then I found the LSI “sas2ircu” utility, but again, this one fails at
> giving me the disk slots (it finds the disks, serials and others, but
> slot is always 0)
>
> Because of this, I’m going to head over to the disk bay and unplug the
> disk which I think corresponds to the alphabetical order in linux, and
> see if it’s the correct one…. But even if this is correct this time, it
> might not be next time.
>
>
>
> But this makes me wonder : how do you guys, Ceph users, manage your
> disks if you really have JBOD servers ?
>
> I can’t imagine having to guess slots that each time, and I can’t
> imagine neither creating serial number stickers for every single disk I
> could have to manage …
>
> Is there any specific advice reguarding JBOD cards people should (not)
> use in their systems ?
>
> Any magical way to “blink” a drive in linux ?
>
>
>
> Thanks && regards
>
>
>
> _______________________________________________
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> ceph-users@xxxxxxxxxxxxxx
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>
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