Linux RAID management utilities?
Paul Lussier
p.lussier at comcast.net
Tue Sep 25 22:54:49 EDT 2007
Bill McGonigle <bill at bfccomputing.com> writes:
> On Sep 24, 2007, at 20:07, Paul Lussier wrote:
>
>> Wouldn't it just be something like:
>> mdadm /dev/md0 --assemble --uuid=<insert UUID here> /dev/sda1 /
>> dev/sdb1 ...
>
> Yeah, that's what the tool would output. The input would be like
> "addall /mnt/backup" or something.
Huh? What tool? mdadm *is* the tool. You can get the UUID of a
given raid set by querying the device with mdadm:
# mdadm -D /dev/md0 |egrep 'dev|UUID'
/dev/md0:
0 3 1 0 active sync /dev/hda1
1 22 1 1 active sync /dev/hdc1
UUID : 25815b8c:1735351e:aa21466a:f14221c1
If the md device isn't currently active, and you need the UUID, query
one of the devices which comprise that md device:
# mdadm -E /dev/hda1 |egrep 'dev|UUID'
/dev/hda1:
UUID : 25815b8c:1735351e:aa21466a:f14221c1
this 0 3 1 0 active sync /dev/hda1
0 0 3 1 0 active sync /dev/hda1
1 1 22 1 1 active sync /dev/hdc1
So, now you should be able to do something like:
mdadm /dev/md0 \
--assemble --uuid='25815b8c:1735351e:aa21466a:f14221c1' \
/dev/hd[ae]1
And have your md device running.
--
Seeya,
Paul
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