From: David Rees <drees76@gmail.com>
To: Ryan Wagoner <rswagoner@gmail.com>
Cc: David Lethe <david@santools.com>,
Bill Davidsen <davidsen@tmr.com>,
Alain Williams <addw@phcomp.co.uk>,
linux-raid@vger.kernel.org
Subject: Re: High IO Wait with RAID 1
Date: Fri, 13 Mar 2009 15:10:04 -0700 [thread overview]
Message-ID: <72dbd3150903131510p58c85cf6pdd70f11330774958@mail.gmail.com> (raw)
In-Reply-To: <7d86ddb90903131129k2fa7d98ah636320c9a3b78259@mail.gmail.com>
On Fri, Mar 13, 2009 at 11:29 AM, Ryan Wagoner <rswagoner@gmail.com> wrote:
> The other system with the onboard ICH controller exhibits the same
> symptoms so I think my card is configured correctly. The interesting
> part of this is I can kick off a resync on all three RAID volumes and
> the system load and io wait is low. The rebuild rate is 85M/s for the
> RAID 5 volume and 65M/s for the RAID 1 volumes, which is the max each
> individual drive can do.
The load from rebuilding the raid doesn't show up in system load or io
wait as it's done in-kernel. If you run some other IO intensive
processes during the rebuild you should notice that it will run a bit
slower and io wait should be higher.
-Dave
next prev parent reply other threads:[~2009-03-13 22:10 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-13 18:02 High IO Wait with RAID 1 David Lethe
2009-03-13 18:29 ` Ryan Wagoner
2009-03-13 22:10 ` David Rees [this message]
-- strict thread matches above, loose matches on Subject: below --
2009-03-12 23:46 Ryan Wagoner
2009-03-13 0:48 ` Alain Williams
2009-03-13 3:21 ` Ryan Wagoner
2009-03-13 9:39 ` Robin Hill
2009-03-13 10:17 ` Alain Williams
2009-03-13 16:22 ` Bill Davidsen
2009-03-13 17:42 ` Ryan Wagoner
2009-03-13 18:37 ` David Rees
2009-03-13 18:42 ` David Rees
2009-03-13 14:48 ` John Robinson
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