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The Saturday 2007-12-15 at 10:00 -0000, Tim Hempstead wrote:
..
Now sdg is part of a 6 disk RAID5 array (md0) using Linux software
raid. I am assuming that the process to replace the disk is something
like this:
0 - check the state
mdadm --detail /dev/md0
1). Make sure I have an up to date backup of everything important off the server
2). Fail the disk in the Raid array by using a mdadm command? (as its
not showing in there as having issues yet so I'll need to force it)
mdadm --manage --set-faulty /dev/md0 /dev/sdg
3). Remove disk from array using mdadm command?
mdadm /dev/md0 -r /dev/sdg
4). Establish which physical disk is sdg (I have it down to 2 already i think)
5). Shutdown server
6). Replace disk with another of the same size (fortunately i have a spare).
Or bigger.
7). start up server
Partition the disk, type fd - I'm unsure if it is absolutely necessary,
but I believe it is. Check the other disks to make sure.
8). Add disk to array (as new spare?)
Or simply add it
mdadm /dev/md0 -a /dev/sdg
but check first if it still is sdg
9). re-sync the array onto the new disk
Should start up automatically after adding it.
I am not to sure about steps 2 and 3 and steps 8 and 9 so if anyone
has any information, (or any good links to information on how to do
this), I would be grateful if you could share you insights.
There is a howto with way more info.
- --
Cheers,
Carlos E. R.
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