[linux-lvm] Best practice for lvm on raid-5

Nils Juergens nils at muon.de
Mon Feb 2 11:22:02 UTC 2004

On Mon, 02.02.04, Jens Hoffrichter <joho at hausboot.org> wrote:

> Currently I have /dev/md0 as my only physical volume, but this will lead
> to problems if I am going to expand the raid 5 by adding another 80 GB
> harddrive to (as pvresize is not implemented again yet, as I understand).

Unless I am mistaken, it is not even possible to expand /dev/md0 by adding
another drive in the first place. And because linux software raid has
no way of knowing which blocks are in use and which are not, i do not see
how this could ever be possible.

If you add another array (raid1 or raid5) as /dev/md1, you can vgextend your



Nils Juergens  | nils at muon.de | icq 7090774
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