From owner-freebsd-scsi@FreeBSD.ORG Thu Nov 6 08:44:14 2003 Return-Path: Delivered-To: freebsd-scsi@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id ABEC216A4CF for ; Thu, 6 Nov 2003 08:44:14 -0800 (PST) Received: from chortos.wingnet.net (chortos.wingnet.net [206.30.57.3]) by mx1.FreeBSD.org (Postfix) with SMTP id 62C6743FF2 for ; Thu, 6 Nov 2003 08:44:12 -0800 (PST) (envelope-from jesse@wingnet.net) Received: (qmail 21638 invoked by uid 3848); 6 Nov 2003 16:44:11 -0000 Received: from jesse@wingnet.net by chortos.wingnet.net by uid 1003 with qmail-scanner-1.20rc3 (clamuko: 0.60. Clear:RC:1:. Processed in 0.030308 secs); 06 Nov 2003 16:44:11 -0000 X-Qmail-Scanner-Mail-From: jesse@wingnet.net via chortos.wingnet.net X-Qmail-Scanner: 1.20rc3 (Clear:RC:1:. Processed in 0.030308 secs) Received: from makrothumia.wingnet.net (HELO 192.168.1.47) (206.30.215.5) by chortos.wingnet.net with SMTP; 6 Nov 2003 16:44:10 -0000 From: Jesse Guardiani Organization: WingNET To: "Moore, Eric Dean" Date: Thu, 6 Nov 2003 11:44:10 -0500 User-Agent: KMail/1.5.4 References: <0E3FA95632D6D047BA649F95DAB60E57035A9B8A@exa-atlanta.se.lsil.com> In-Reply-To: <0E3FA95632D6D047BA649F95DAB60E57035A9B8A@exa-atlanta.se.lsil.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200311061144.10119.jesse@wingnet.net> cc: freebsd-scsi@freebsd.org Subject: Re: performance problem with amr driver and Perc 2/SC X-BeenThere: freebsd-scsi@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: SCSI subsystem List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 06 Nov 2003 16:44:14 -0000 On Thursday 06 November 2003 10:58, you wrote: > Those are the optimal performance settings for > those respective raid levels. Please go into > control M and makesure those are your settings. OK. I did this, and it more than doubled my sustainable write speed! I went from this: write read 2.05 MByte/Sec 12.59 MByte/Sec To this: write read 6.31 MByte/Sec 13.49 MByte/Sec Also, my peak Write went from about 3MB/Sec to 11MB/Sec, and my peak Read went from about 13 MB/Sec to 18MB/Sec. However, this still seems slow to me for an Ultra 2 SCSI RAID-5 array. Is there anything else I can do to speed things up? More RAM on the Perc 2/SC? A different SCSI RAID controller altogether? The PowerEdge 4300 only has a 32-bit PCI bus, but I should still be able to achieve 20 MB/Sec Write and 20-40 MB/Sec Read with the right hardware, right? > If your still having issue, please contact > Atul or Rajesh as they are now maintaining this driver. > > Eric > > > On Thursday 06 November 2003 10:02, you wrote: > > > My suggestion is to go into Control M Configuration Utility: > > > > OK. I understand that. > > > > > RAID5: Write Back Cache, Normal Read Ahead, and Direct I/O > > > RAID1: Write Through Cache, Normal Read Ahead, and Direct I/O > > > > I'm not sure what you're trying to say here. As I stated in > > my original > > post, I'm running RAID5. What do you want me to do with the Write Back > > Cache, Normal Read Ahead, and Direct I/O? > > > > Thanks! > > [...] -- Jesse Guardiani, Systems Administrator WingNET Internet Services, P.O. Box 2605 // Cleveland, TN 37320-2605 423-559-LINK (v) 423-559-5145 (f) http://www.wingnet.net