Date: Mon, 18 Oct 2004 15:17:38 -0400 From: Mike Tancsa <mike@sentex.net> To: Julian Elischer <julian@elischer.org> Cc: freebsd-current@freebsd.org Subject: Re: FreeBSD 5.3b7and poor ata performance Message-ID: <6.1.2.0.0.20041018151602.0543e2a8@64.7.153.2> In-Reply-To: <41741449.5080900@elischer.org> References: <20041015190638.C5A0E5D04@ptavv.es.net> <41715E7F.7060509@ng.fadesa.es> <20041018100045.f8koww0skcco0woo@www.sweetdreamsracing.biz> <4173D66F.6010200@DeepCore.dk> <17120aa104101808381cc59152@mail.gmail.com> <41741449.5080900@elischer.org>
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At 03:06 PM 18/10/2004, Julian Elischer wrote:
>what are perfomrances when you don't go thrrough the filesystem?
>
>how fast is:
>dd if=/dev/ad0 of=/dev/null bs=128k count=10000
Just as a point of reference, on a 915 board with
915# atacontrol list
ATA channel 0:
Master: no device present
Slave: no device present
ATA channel 1:
Master: ad2 <ST3120026AS/3.18> Serial ATA v1.0
Slave: no device present
915# dd if=/dev/ad2 of=/dev/null bs=128k count=10000
10000+0 records in
10000+0 records out
1310720000 bytes transferred in 22.493172 secs (58271906 bytes/sec)
915#
915# uname -a
FreeBSD 915.sentex.ca 5.3-STABLE FreeBSD 5.3-STABLE #1: Mon Oct 18 10:08:54
EDT 2004 mdtancsa@915.sentex.ca:/usr/obj/usr/src/sys/915 i386
915#
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