Carlos Carvalho <[EMAIL PROTECTED]> writes:
> >6 disks, 3 controllers, RAID-0 + RAID-5 (67%)
> ^^^^^^^ ^^^
> Yes, that's what I call not so affordable :-(
Four disks out of six carrying data. Not too bad, I think, if you're
aiming for data security.
> Anyway, I found it interesting, though I think linux doesn't support
> these modes, except RAID-0 + RAID-1. This setup is also interesting to
> maximize speed while having redundancy. If only it were not so
> expensive disk-wise...
Linux supports any combination you can think of, since you can stack
md's on top of each other. In particular, the combination above would
be
/dev/md0: raid0 /dev/sda /dev/sdb
/dev/md1: raid0 /dev/sdc /dev/sdd
/dev/md2: raid0 /dev/sde /dev/sdf
/dev/md3: raid5 /dev/md0 /dev/md1 /dev/md2
The problem with this combination is that while it can survive a
controller failure or a single-disk failure, it can't survive any
two-disk failure. But there's always some situation that a raid setup
can not handle.. :(
--
Osma Ahvenlampi
