From mboxrd@z Thu Jan  1 00:00:00 1970
From: Keld Simonsen <keld@keldix.com>
Subject: Re: raid1 performance
Date: Mon, 26 Jul 2010 13:30:27 +0200
Message-ID: <20100726113027.GA14118@rap.rap.dk>
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 <4C4D6916.9060801@anonymous.org.uk>
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To: John Robinson <john.robinson@anonymous.org.uk>
Cc: Marco <jjletho67-diar@yahoo.it>, Roman Mamedov <roman@rm.pp.ru>, linux-raid@vger.kernel.org
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On Mon, Jul 26, 2010 at 11:53:10AM +0100, John Robinson wrote:
> On 26/07/2010 11:24, Keld Simonsen wrote:
> [...]
> >Did you try:
> >
> ># Set read-ahead.
> >echo "Setting read-ahead to 64 MiB for /dev/md3"
> >blockdev --setra 65536 /dev/md3
> 
> That'll set read-ahead to 32MiB, because blockdev works in sectors.

Thanks for the correction, updated on wiki.

keld