From owner-freebsd-scsi Thu Jul 2 15:49:58 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id PAA25105 for freebsd-scsi-outgoing; Thu, 2 Jul 1998 15:49:58 -0700 (PDT) (envelope-from owner-freebsd-scsi@FreeBSD.ORG) Received: from IAEhv.nl (root@iaehv.IAEhv.nl [194.151.64.2]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id PAA25100 for ; Thu, 2 Jul 1998 15:49:56 -0700 (PDT) (envelope-from wjw@surf.IAE.nl) Received: from surf.IAE.nl (root@surf.IAEhv.nl [194.151.66.2]) by IAEhv.nl (8.8.7/8.8.7) with ESMTP id AAA11754; Fri, 3 Jul 1998 00:49:57 +0200 (CEST) Received: (from wjw@localhost) by surf.IAE.nl (8.8.7/8.8.7) id AAA06671; Fri, 3 Jul 1998 00:49:56 +0200 (MET DST) From: Willem Jan Withagen Message-Id: <199807022249.AAA06671@surf.IAE.nl> Subject: Re: Using a DPT controller, pros and cons In-Reply-To: from Tom at "Jul 2, 98 09:34:52 am" To: tom@sdf.com (Tom) Date: Fri, 3 Jul 1998 00:49:56 +0200 (MET DST) Cc: wjw@iaehv.nl, scsi@FreeBSD.ORG Reply-To: wjw@iaehv.nl X-NCC-RegID: nl.iae X-Mailer: ELM [version 2.4ME+ PL40 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org 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 -- Internet Access Eindhoven BV., voice: +31-40-2 393 393, data: +31-40-2 606 606 P.O. 928, 5600 AX Eindhoven, The Netherlands Full Internet connectivity for only fl 12.95 a month. Call now, and login as 'new'. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message