From: Ian Molton <spyro@armlinux.org>
To: linux-kernel@vger.kernel.org
Subject: slow read performance...
Date: Mon, 10 Dec 2001 04:48:49 +0000 [thread overview]
Message-ID: <20011210044849.538c84c6.spyro@armlinux.org> (raw)
Hi.
I've just run bonnie (Im curious :) and got some disappointing figures.
Im running a Duron @ 976MHz, on an ASUS A7M (76x northbridge, via 686B
southbridge)
the machine has 256MB RAM and a seagate ST320413A UDMA 100 harddisc as the
only device on the primary ide interface.
UDMA is /on/, and all in hdparm looks OK - 32 bit IO etc.
write speed is fine (22-30MB/sec) but reads are horribly slow, as little as
9MB/sec and I havent seen >16MB/sec yet.
I am using a 400MB test in bonnie to remove linuxs disc cache from the
equation, as suggested by someone here.
I thought HDDs were supposed to /read/ faster than they write?
if 9MB/sec normal? seems low... I thought UDMA 100 discs were up around the
30MB/sec mark for reads...
or does bonnie just report unrealistic read speeds? the machine 'feels'
responsive enough...
TIA...
reply other threads:[~2001-12-10 5:27 UTC|newest]
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