[linux-lvm] Software raid on top of lvm logical volume

Michael T. Babcock mike at mikebabcock.ca
Mon Nov 1 15:38:41 UTC 2004

Markus Baertschi wrote:

> You can make life easier by creating several raid arrays on the same 
> disks and tie them together with LVM.
> For example split your three 160GB drives into 4 partitions each and 
> create a raid over the three disks.
> sda -> sda1+sda2+sda3+sda4, etc.
> md0 = sda1+sdb1+sdc1, md1=sda2+sdb2+sdc2, etc.

And how exactly does that allow me to easily change how much RAID-0 or 
RAID-5 storage I have?

If I need more RAID-5 storage and I want to steal it from RAID-0 space, 
I need to dissassemble LVM, then software RAID, then repartition, then 
rebuild RAID, then restore LVM.
Michael T. Babcock

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