Re: Another LaCie 5big Network 2 problem
Posted: Thu Sep 12, 2013 8:18 am
It's not over yet. A 'failed raid member' is no more than a raid member which isn't 'known to be good'. But the problem could be as little as a 'last changed' stamp which was never written to the raid header. If you didn't copy gigabytes of data to the array, while this member was dropped, the array can be re-created, with possibly only minor filesystem inconsistencies, or maybe completely sane.
The command to do so is:
You'll have to examine each member to find it's role in the array.
(BTW, this is from your posting here, and now I realize that sdc2 is supposed to be device 2. Your posting shows sdc2-0 sdb2-1 sda2-2. So even in the Lacie you'll have to ask the exact role of the members, before re-creating the array.)
@fvdw: is /dev populated automatically, in the kernel used by tenhouse? If yes, then Lacie sells boxes with pre-mangled raid arrays. Nice for data recovery.
/Edit: Do I see the book 'Applying UML and patterns' there? Nice reading before sleep.
The command to do so is:
- Code: Select all
mdadm --create --assume-clean --metadata=1.0 --chunk=512 --level=raid5 --layout=left-symmetric --raid-devices=5 /dev/md0 /dev/sda2 /dev/sdb2 /dev/sdc2 /dev/sdd2 /dev/sde2
- Code: Select all
mdadm --create --assume-clean --metadata=1.0 --chunk=512 --level=raid5 --layout=left-symmetric --raid-devices=5 /dev/md0 /dev/sda2 /dev/sdb2 /dev/sdc2 missing /dev/sde2
You'll have to examine each member to find it's role in the array.
This one is the 'zero'th' of the array, or in normal speak the first one.mdadm --examine /dev/sdc2
/dev/sdc2:
<snip>
Device Role : Active device 0
(BTW, this is from your posting here, and now I realize that sdc2 is supposed to be device 2. Your posting shows sdc2-0 sdb2-1 sda2-2. So even in the Lacie you'll have to ask the exact role of the members, before re-creating the array.)
@fvdw: is /dev populated automatically, in the kernel used by tenhouse? If yes, then Lacie sells boxes with pre-mangled raid arrays. Nice for data recovery.
/Edit: Do I see the book 'Applying UML and patterns' there? Nice reading before sleep.