hardware question [2]: SATA RAID

[Darryl Clarke]

On 5/12/06, Matt Price <matt.price at utoronto.ca> wrote:
> On Fri, May 12, 2006 at 11:44:05AM -0400, Darryl Clarke wrote:
> > On 5/12/06, Matt Price <matt.price at utoronto.ca> wrote:
> > > Hi folks,
> > >
> > > space...  what I'd really LOVE to do is to have some (absolutely crucial)
> > > partitions (/home, /usr, /etc) mirrored and other, less essential partitions
> > > (/music, /videos) striped.
>
> > Based on theory, you can do exactly as you stated. :)
> >
> > If you create identical partitions on both drives, the mdadm tool can
> > be used to create the different types of raid.
> >
> > I'd try something like this:
> > sda1:sdb1 / (19gb)
> > sda2:sdb2 /home (80gb)
> > sda3:sdb3 /storage (200gb)
> > sda4:sda4 swap (1gb) * depending on your system, really...
> >
> > Then using mdadm I would create a mirror of sda1:sdb1 (md0), sda2:sdb2
> > (md1), and a stripe of sda3:sdb3 (md2), and enable both swap
> > partitions seperately
> >
> > You would effectively end up with a 19gb system, 80 gb home, and 400gb
> > of 'storage'...
>
> wow.  can I just say: linux rocks.  that is truly amazing.
>
> would it be possible to mix  this with LVM?  Say:
> sda1:sda1 (tiny)
> sda2:sdb2 (97gig)
> sda3:sdb3 (200 gig)
> sda4:sdb4 (2 gig)
>
> then set up sda1:sdb1 = md0 as /boot, mirrored
>             sda2:sdb2 = md1 as LVM containing / and /home, mirrored
>             sda3:sdb3 = md2 as LVM containing /video and /audio, striped.
> Or maybe the sda3:sdb3 wouldn't be RAID'ed at all, but just a giant LVM
>
> I guess I'm sort of thinking out loud here, os maybethe setup isn't perfect.
> but in principle does such a mixture sound plausible?

Of course, LVM on top of raid is no problem as long as you can get
over the added layers of fun (read: complexity)

-- 
~ Darryl  ~ smartssa at gmail.com
~ http://darrylclarke.com