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    SubjectRe: Poor SCSI drive performance on SMP machine, 2.2.16
    Date
    I did this:

    date
    dd if=/dev/zero of=TESTFILE bs=1024 count=102400
    date
    sync
    date


    and I gave the time differences from the first to the last timestamp.

    Regards, Para-dox (paradox3@maine.rr.com)



    ----- Original Message -----
    From: "Bruce Harada" <bruce@ask.ne.jp>
    To: "paradox3" <paradox3@maine.rr.com>
    Cc: <linux-kernel@vger.kernel.org>
    Sent: Sunday, January 28, 2001 2:31 PM
    Subject: Re: Poor SCSI drive performance on SMP machine, 2.2.16


    >
    > Hm. As a point of comparison, I use a similar system to yours (full SCSI,
    > though, no IDE) and I can copy a 100MB file from disk-to-disk, or on the
    > same disk, in around 13 seconds. Where are you copying to the SCSI drive
    > from - the same drive, an IDE disk, CDROM? If IDE, what are its
    > particulars? (Check with hdparm -iI /dev/hd?)
    >
    > --
    > Bruce Harada
    > bruce@ask.ne.jp
    >
    >
    >
    > On Sun, 28 Jan 2001 12:44:29 -0500
    > "paradox3" <paradox3@maine.rr.com> wrote:
    > >
    > > I don't get any messages relating to the drives in any syslog output.
    > >
    > > >
    > > > Do you get messages like the ones below in /var/log/messages?
    > > >
    > > > sym53c875-0-<0,0>: QUEUE FULL! 8 busy, 7 disconnected CCBs
    > > > sym53c875-0-<0,0>: tagged command queue depth set to 7
    > > >
    > > > In fact, do you get any messages in your log files that look like they
    > > > might be related?
    > > >
    > -
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