From owner-freebsd-stable@FreeBSD.ORG  Tue Oct 31 09:35:29 2006
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Date: Tue, 31 Oct 2006 10:35:25 +0100
From: Fredrik Widlund <fredrik.widlund@qbrick.com>
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To: Ivan Voras <ivoras@fer.hr>
References: <45470D95.5020801@qbrick.com> <ei7448$4rs$1@sea.gmane.org>
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Cc: freebsd-stable@freebsd.org
Subject: Re: SAS Raid - mfi driver
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Ivan Voras wrote:
> Several:
>
> - are there cache differences between the controllers (amount of
> memory, cache policy)?
Default settings on both.
> - how does writing directly to the device (bypassing file system)
> compare?
Drives are four seagate 7200.10 400GB in a Raid-5 configuration.

[/mnt/test (/dev/mfid0p1 mounted)]
read: 200MB/s
write: 15MB/s

[/dev/mfid0p1]
read: 200MB/s
write: 8MB/s

[/dev/mfid0]
read: 200MB/s
write: 10MB/s

Kind regards,
Fredrik Widlund