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Re: replacing a failed RAID component
On Sat, 7 Nov 2009, Steven Bellovin wrote:
I'm using RAIDFRAME in a RAID 1 configuration. One of the disks has failed
and needs to be replaced; the question is how, precisely, I do it. More
specifically, how do I prepare the new disk? My assumption is that I have to
set up the proper fdisk label (including the boot block); I then have to use
disklabel to make the 'e' partition of type RAID. The last thing I should do
is use 'raidctl -R' to reconstruct the RAID set.
Do I need to do anything else? Do I need to do something to initialize the
replacement disk's RAID stuff?
A cheap hack is to use dd to copy the first few sectors (i.e. including
mbr code, fdisk partition table and diskabel) from one disk to the other.
Then use raidctl -a, raidctl -F, etc. to rebuild the array.
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