[linux-lvm] software RAID over LVM

Kirby C. Bohling kbohling at birddog.com
Tue Jan 29 17:53:02 UTC 2002


Paul,

	I haven't done it.  I have done mirrors underneath, but I am curious what 
is the reasoning and/or application.  The only thing I can think up is 
so you can migrate your mirrors to faster drives easily.  However, 
putting the mirror underneath should allow you to move off one mirror 
onto another.

	I don't believe that mirroring can be expanded like a filesystem can.  In 
order to make the mirror bigger, you have to break the mirror as far as 
I know.  So what are you planning on doing with it, or is it just "to 
see if it could be done".

	Thanks,
		Kirby

lvm at agilecat.mailshell.com wrote:
> Hi all,
> 
> I understand the use of LVM over software RAID.
> But is it possible to use software RAID ON TOP
> of LVM?  For example, have a RAID-1 mirroring
> array created from two logical volumes.
> 
> I've tried and it seems to be working.  Is
> it safe to do this?  Any pitfalls?
> 
> Thanks!
> 
> Paul
> 
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