[arch-general] New Page added to wiki - Add_New_Partitions_To_Existing_System
darose at darose.net
Fri Jul 10 11:56:04 EDT 2009
Guilherme M. Nogueira wrote:
> I was just wondering...
> what happens if one of the drives in the lvm array goes dead?
That can be a problem, depending how your LVM is configured. If you
have a logical volume that spans multiple disk drives, then the file
system on that volume can get corrupted and/or unreadable/unwriteable.
So it's generally a bad idea to do that.
Your options around this are either:
* make every physical disk be its own volume group, thereby ensuring
that no logical volume can span more than one disk. (I do this on my
machines, and this works fine for my personal needs, where I only need
relatively small amounts of storage. But this wouldn't work for
large-scale situations such as where you're trying to create huge
virtual disks with multiple terabytes of storage.)
* use a raid array as the physical volume underlying a volume group.
The redundancy of the raid array would guarantee that the physical
storage would still be accessible even if one of the disk drives in the
array died. People who use LVM in hard-core, large-scale operations
usually go this route.
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