Date: Fri, 3 Jul 1998 00:49:56 +0200 (MET DST) From: Willem Jan Withagen <wjw@surf.IAE.nl> To: tom@sdf.com (Tom) Cc: wjw@iaehv.nl, scsi@FreeBSD.ORG Subject: Re: Using a DPT controller, pros and cons Message-ID: <199807022249.AAA06671@surf.IAE.nl> In-Reply-To: <Pine.BSF.3.95q.980702092915.3956A-100000@misery.sdf.com> from Tom at "Jul 2, 98 09:34:52 am"
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You ( Tom ) write:
=>
=> On Thu, 2 Jul 1998, Willem Jan Withagen wrote:
=>
=> > The other issue:
=> > I've done 3 'dd if=/dev/zero of=/mnt?/bar' in parallel on the
=>
=> What blocksize?
Just the dd-default. Would that matter in what I observe? I was just trying
to see if I understand this box. :-)
=> Well, you are operating the DPT with only narrow drives at 5mhz, so that
=> is going to hurt. Also, the DPT controller is optimized for random
=> access, not sequentional access. If "dd" writing represents a typical
=> function of your system, you should probably disable the write cache
=> completely.
No, just trying to see if things work. It be used as:
mail-server
web-server
news-server
home-directories for +10.000 users
......
=> You've got some real problems with your hardware. You shouldn't see
=> any such warnings.
:-{
--WjW
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