> > The reason is that on a master-slave setup, the slave disc is controlled
> > by the master. If on a [hda-hdc]+[hdb-hdd] raid 0+1 the master device of
> > *any* IDE controller fails, the slave will inmediatly fail also (I'd bet
> > it surelly will happen if it's the slave who fails, so this statement
> > could be widened to "if *any* disc fails"), rendering your raid 0+1
> > inmediatly unusable, and making recovery thougher.
>
Yeah, but even if the master fails, the data remains intact on the slave.
It can be rejumped and the array can be restarted in degraded mode. Been
there done that with a 3 disk raid 5 with 2 ide controllers. The drive
that failed was on the 2-disk controller and took the whole machine down
- of course. The data was fine, took about 10 minutes to get the thing
running again.
