Subject: Re: Multiple RAID1 partions on same disks
To: David Brownlee <email@example.com>
From: Greg Oster <firstname.lastname@example.org>
Date: 08/29/2002 20:43:29
David Brownlee writes:
> Would there be any sense in creating two RAID1 partitions across
> a pair of disks - one for the system partions and swap and one
> for the data?
> The thought is to give two I/O queues, plus the ability to
> repartion the data side without touching the system.
Plus if there is a serious error on one partition (e.g. you end up with a real
physical read error) only that one partition will be in degraded mode, and
you'll still benefit from having RAID on the other (non-failed) parts of the
> Would there be any chance it could degrade the performance of
> the system?
I've not done any real benchmarking on exactly that, but it shouldn't be
any worse than partitioning a disk without the RAID.
FWIW, I usually setup a pair of partitions to be used (non-RAIDed) for
bootblocks+kernels, a pair in a RAID set for /, a pair in a RAID set for
swap, and a pair in a RAID set for '/u1' (or whatever).