From owner-freebsd-current Fri Oct 22 7: 8:22 1999 Delivered-To: freebsd-current@freebsd.org Received: from granite.sentex.net (granite.sentex.ca [199.212.134.1]) by hub.freebsd.org (Postfix) with ESMTP id 091C115012 for ; Fri, 22 Oct 1999 07:08:15 -0700 (PDT) (envelope-from mike@sentex.net) Received: from simoeon (simeon.sentex.ca [209.112.4.47]) by granite.sentex.net (8.8.8/8.6.9) with SMTP id KAA28736; Fri, 22 Oct 1999 10:08:09 -0400 (EDT) Message-Id: <3.0.5.32.19991022100711.01dd8c90@staff.sentex.ca> X-Sender: mdtpop@staff.sentex.ca X-Mailer: QUALCOMM Windows Eudora Light Version 3.0.5 (32) Date: Fri, 22 Oct 1999 10:07:11 -0400 To: Geoff Buckingham From: Mike Tancsa Subject: Re: AMRD (MegaRAID) BIOS rev another other questions Cc: freebsd-current@FreeBSD.ORG In-Reply-To: <19991022140949.A82396@chuggalug.clues.com> References: <3.0.5.32.19991020143339.016e0210@staff.sentex.ca> <3.0.5.32.19991020143339.016e0210@staff.sentex.ca> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG At 02:09 PM 10/22/99 +0100, Geoff Buckingham wrote: >The near 100 CPU use during the seek test combined with very high numbers of Thanks for the pointers. It certainly gives me direction to look in. This is my first foray into RAID, so I am just starting exploring the technology. Also, my first venture into current. I must say I am bit suprised at how... well stable it all is so far. I am almost tempted to put it into the mix as a test proxy server for our customers after I get a little better sense of the various RAID params to tweak. Here are some results using 5 Seagate 1gig 5400 RPM drives (bought at onsale for $25 each BTW! cheap way for me test things out!) RAID 5, Writeback cache, 128K stripe, 16M of cache on the controller, 64M of RAM on the PII 300. First result is the array (R), second (I) is a wdc0: unit 0 (wd0): , LBA, DMA, 32-bit, multi-block-16 Both drives are mounted async, noatime -------Sequential Output-------- ---Sequential Input-- --Random-- -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks--- MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU R200 14879 93.8 16137 32.0 2231 5.6 10548 76.9 12749 17.0 107.8 1.8 I200 9759 61.4 9759 18.5 3894 10.1 12328 91.4 12839 17.8 133.3 2.1 R768 14844 93.3 15495 31.1 2029 5.1 10935 79.8 13031 17.5 75.3 1.4 I768 9787 61.9 9915 19.0 4265 10.9 12714 94.5 15604 21.9 73.3 1.3 ---Mike ------------------------------------------------------------------------ Mike Tancsa, tel 01.519.651.3400 Network Administrator, mike@sentex.net Sentex Communications www.sentex.net Cambridge, Ontario Canada To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message