From owner-freebsd-scsi Thu Apr 30 10:11:19 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id KAA11002 for freebsd-scsi-outgoing; Thu, 30 Apr 1998 10:11:19 -0700 (PDT) (envelope-from owner-freebsd-scsi@FreeBSD.ORG) Received: from kaori.communique.net (kaori.communique.net [204.27.67.55]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id KAA10997 for ; Thu, 30 Apr 1998 10:11:17 -0700 (PDT) (envelope-from rzig@verio.net) Received: by kaori.communique.net with Internet Mail Service (5.0.1458.49) id ; Thu, 30 Apr 1998 12:10:59 -0500 Message-ID: From: Raul Zighelboim To: "'Tom'" Cc: "'scsi@freebsd.org'" , "'n@nectar.com'" Subject: RE: DPT driver performance Date: Thu, 30 Apr 1998 12:10:57 -0500 X-Priority: 3 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.0.1458.49) Content-Type: text/plain Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org I am running ONE drive on an AHC controller and ONE drive on a DPT controller. No stripping, no raid. Just one drive. Both are formated with 512b/s. No, I do not intend to run iozone as my main application. But it bothers me that under the same conditions, the Adaptec controller can write a large file twice as fast. You're saying that this is not relevant ? ================================================== Raul Zighelboim rzig@verio.net > -----Original Message----- > From: Tom [SMTP:tom@sdf.com] > Sent: Thursday, April 30, 1998 10:27 AM > To: Raul Zighelboim > Cc: 'scsi@freebsd.org'; 'n@nectar.com' > Subject: Re: DPT driver performance > > > On Thu, 30 Apr 1998, Raul Zighelboim wrote: > > > Is there anything I can do to improve the DPT performance? Can I > > Is your DPT performance actually poor? You've shown that iozone > looks > bad, which could be a problem if your server is intended to run iozone > all > the time. > > The array settings are much more important. Things like strip size, > number of drives and the RAID level used are critical. Strangely you > did > not even mention any of this stuff. > > Tom To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message