[linux-lvm] Mirroring

A James Lewis james at fsck.co.uk
Fri Feb 11 18:06:34 UTC 2000

What you're asking is can LVM be used in conjunction with MD, and is this
the correct solution or is LVM/MD going to merge or LVM duplicate MD's

I'd like those answers too!!!!

On Fri, 11 Feb 2000, Chris Anderson wrote:

> Harald Milz wrote:
> > Chris Anderson <chris at alwan.com> wrote:
> > > I have looked through the doc and I see that LVM stripes but how do you
> > > setup a true mirror?  One hard dive mirrored to another hard drive (1 to
> > > 1).
> >
> > It's more like one partition or logical volume mirrored against another
> > one (not necessarily disks - you seem to be familiar with Novell). LVM
> > can't do this. Use MD.
> I know veritas.  It has a SubDisk, Plex Volume setup.  A subdisk is part of a
> disk and one or more subdisk make a Plex and one or more plexes make a
> volume.  And a volume can be used as a mount point or whatever.
> So if a disk goes bad only plexes with use a subdisk from that disk are
> down.  And if a volume has two plex only one need to be up to run.  Later the
> plex can be re-joined back to the volume and the data is synched back to the
> other plex.
> In a nut shell what happens when one disk goes down with LVM?  Can it be
> setup to keep the volume up and alive and run and if so what is the best way?
> >
> >
> > --
> > If you sit down at a poker game and don't see a sucker, get up.  You're
> > the sucker.

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