Subject: Re: Multiple RAID1 partions on same disks
To: Greg Oster <email@example.com>
From: David Brownlee <firstname.lastname@example.org>
Date: 08/30/2002 17:07:23
On Fri, 30 Aug 2002, Greg Oster wrote:
> Manuel Bouyer writes:
> > On Thu, Aug 29, 2002 at 08:43:29PM -0600, Greg Oster wrote:
> > > [..]
> > > > 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.
> > Could't there be an issue with parity rebuild or reconstruction ?
> Yes, you are correct. But hopefully that is something that doesn't happen
> very often :)
> > raidframe will do this in background, slowing down when there are other
> > I/O going through the RAID, but will it include I/O not going through the
> > RAID for its computations ?
> No. RAIDframe will not know about any other I/O that might be happening to
> other partitions on a disk. This includes I/O to other RAID sets as well...
Would there be any utility in an option to postpone the raidctl -P
until after the fsck has been run on a disk? Somewhat compromises
redundancy in favour of getting the system running faster.
David/absolute -- www.netbsd.org: No hype required --