[CentOS] Software RAID in CentOS (EL)

Tue Apr 19 12:21:17 UTC 2005
James Olin Oden <james.oden at gmail.com>

On 4/19/05, Francois Caen <frcaen at gmail.com> wrote:
> On 4/18/05, Chuck Rock <carock at epctech.com> wrote:
> > Isn't RAID supposed to be redundant disks, not redundant partitions? If that
> > hda disk goes bad, the raid and redundancy is nowhere to be found along with
> > your data. Right?
> Software is more flexible than that. It works with partitions.
> Of course, for redundancy purposes, you want to mirror partitions on
> separate physical drives. But you don't have to mirror all the
> partitions on all your drives.
> For example, you don't raid swap partitions.
We do that.   The thinking is that if a drive goes your swap is still
accessible through the md device.  Ultimately we are trying to avoid
VM issues because we lost one drive.