raid on a new server

[Mike Rambo]

Ben Pfaff wrote:

> Mike Rambo <mrambo@lsd.k12.mi.us> writes:
>
> > I'm new enough that I didn't know there *were* any mdutils.  I'll
> > look for some man pages.  I assume that you probably leave the space
> > that'll eventually be the raid device unallocated when the initial
> > install is done?
>
> That's one way to do it.  Alternatively, you could just tell RH
> that those devices are going to be /home, since rebuilding the
> /home tree is trivial.
>
> The manpages you want are mdcreate(8), mdadd(8), mdrun(8), and
> mdtab(5), BTW.

I've got the raid device /dev/md0 coming up and (apparently) working.  I
was able to mke2fs /dev/md0 with no errors.  Now I'm stuck trying to
assign it a mount point.  I wanted /home.  As such I've moved the original
/home to /oldhome and added a line to and fstab to assign /home to
/dev/md0 ...

<fstab>
....
/dev/md0 /home ext2 defaults 1 2
....
</fstab>

... except it doesn't work.  Is it because it's an md device?  If not what
the heck have I missed?  /dev/md0 comes up fine when the system boots but
I can't figure out how to assign it the mount point.  Last time I did this
I just edited fstab (I think) - but then the last time I did this it
wasn't a raid device either.  I've set it up as linear RAID if it matters.

/etc/raidtab
raiddev /dev/md0
    raid-level  linear
    nr-raid-disks  2
    persistent-superblock  1
    chunk-size  16

    device  /dev/sda7
    raid-disk  1
    device  /dev/sdb6
    raid-disk  2

The tools for RH6+ are called raidtools (mkraid, raidstart, raidstop,
raid0run, and the config file /etc/raidtab) now instead of mdtools,
although they're based on mdtools, and they appear to be part of the
default install (I'm not aware of any boxes I checked that caused them to
install anyway).

Mike Rambo
Lansing School District