Ow Mun Heng wrote:
On Thu, 2005-07-07 at 17:50 +0200, Jakub Krajcovic wrote:
Hi Guys,
the subject says it all, but i'll go into more detail now, if anyone
would be interested in helping. I currently have my system installed on
2 40GB IDE drives. They are in an LVM volumegroup, and the 2 drives are
striped. What i need to do is transform this "striped disk cluster"
into a mirror. (preferably using the most cheapest and painless
method). I kind of know my way around LVM, so i don't really need a
_totally_ detailed answer, but i need to know, if this that i am trying
to accomplish is
a) possible
b) what are the steps that i should follow in order to do this?
I was thinking like this: use pvmove or something to move all of the
pv's from one disk to the other, then reduce the volumegroup (remove
the disk eg physical volume from it) add it as a mirror...
Seems to me the best way to do this would be a third Disk. Is this an
option??
Personally, I'd just get two more disks and turn it into a RAID 0+1
setup. If you've got the space, the money and the Molex connectors, I'd
go for it.
Or just get one more disk, backup your data, create a three-drive RAID 5
volume and then copy it all back.
RAID 0+1 would be easier to setup, require much less overhead and have
more fault-tolerance than a three-disk RAID 5 setup. However, it's more
expensive (you need two more disks instead of one more) and it's not as
cool-sounding as "RAID 5." :-P
--
Colin
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