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Message-ID: <eb0e02f40601241819v78b33acbi44c49749c86d0e67@mail.gmail.com>
Date: Wed, 25 Jan 2006 13:19:38 +1100
From: Grant Coady <gcoady@gmail.com>
To: Ed Sweetman <safemode@comcast.net>
Subject: Re: poor raid0 performance in 2.6.16-rc1-mm2?
Cc: linux-kernel@vger.kernel.org
In-Reply-To: <43D6B7F9.3020407@comcast.net>
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On 1/25/06, Ed Sweetman <safemode@comcast.net> wrote:
> I'll have to reboot to double check that this is specific to the above
> kernel version, but It seems something is either wrong with my
> particular kernel config for raid0, or my raid0 is setup wrong.
>
> my raid0 uses 64k chunk sizes on an ext3 fs that's 367GB large, (across
> two identical sata disks on nforce4 chipset)
>
> I have partitions on both drives of equal size (2 altogether) that are
> outside of the raid0.  I dbenched those partitions, the raid0 device,
> and libata pata devices i also have (same rpm, less cache, same company).
>
> pata disk : 403MB/sec
> sata disk 1: 446MB/sec
> raid0 : between 336MB/sec and 386MB/sec

Hmm, looks optimistic, I performed some raid0, raid1 testing on SATA recently
here: http://bugsplatter.mine.nu/test/raid_times

Grant.
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