From owner-freebsd-hardware Wed Jan 12 16:24:25 2000 Delivered-To: freebsd-hardware@freebsd.org Received: from xena.cs.waikato.ac.nz (xena.cs.waikato.ac.nz [130.217.241.20]) by hub.freebsd.org (Postfix) with ESMTP id 1BB4E14E09 for ; Wed, 12 Jan 2000 16:24:20 -0800 (PST) (envelope-from joerg@lucy.cs.waikato.ac.nz) Received: from lucy.cs.waikato.ac.nz (joerg@lucy.cs.waikato.ac.nz [130.217.241.12]) by xena.cs.waikato.ac.nz (8.9.3/8.9.3) with ESMTP id NAA04449; Thu, 13 Jan 2000 13:24:16 +1300 (NZDT) Received: (from joerg@localhost) by lucy.cs.waikato.ac.nz (8.9.3/8.9.0) id NAA28176; Thu, 13 Jan 2000 13:24:14 +1300 (NZDT) Date: Thu, 13 Jan 2000 13:24:14 +1300 From: Joerg Micheel To: "Kenneth D. Merry" Cc: sthaug@nethelp.no, grios@ddsecurity.com.br, ohoyer@fbwi.fh-wilhelmshaven.de, freebsd-hardware@freebsd.org, joerg@cs.waikato.ac.nz Subject: Re: hardware Message-ID: <20000113132414.K5228@cs.waikato.ac.nz> References: <387D0354.63159B8@ddsecurity.com.br> <72218.947717759@verdi.nethelp.no> <20000113124314.I5228@cs.waikato.ac.nz> <20000112165428.A93083@panzer.kdm.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <20000112165428.A93083@panzer.kdm.org>; from Kenneth D. Merry on Wed, Jan 12, 2000 at 04:54:28PM -0700 Organization: SCMS, The University of Waikato, Hamilton, New Zealand Project: WAND - Waikato Applied Network Dynamics, DAG Operating-System: ... drained by Solaris 7 SPARC Sender: owner-freebsd-hardware@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Wed, Jan 12, 2000 at 04:54:28PM -0700, Kenneth D. Merry wrote: > On Thu, Jan 13, 2000 at 12:43:14 +1300, Joerg Micheel wrote: > > FWIW, this is a 3.3-RELEASE system: > > > > da0: Fixed Direct Access SCSI-2 device > > da0: 40.000MB/s transfers (20.000MHz, offset 8, 16bit), Tagged Queueing Enabled > > da0: 47702MB (97693755 512 byte sectors: 255H 63S/T 6081C) > > > > 48 [negara] (root) benchmarks/rawio/work # rawio /dev/rda0c > > Random read Sequential read Random write Sequential write > > ID K/sec /sec K/sec /sec K/sec /sec K/sec /sec > > anon 3556.7 220 5227.6 319 > > > > I can't perform any write tests, this drive is in use. > > > That seems very low. What happens with dd? e.g.: > > dd if=/dev/rda0c of=/dev/null bs=1m count=4096 > > At least for sequential reads, I would expect something in the > neighborhood of what Seagate claims, and their claim of 22.5MB/sec doesn't > seem out of line for a new drive with high media density like that one. Hmm, still learning how to apply the tools properly ... 50 [negara] (root) # dd if=/dev/rda0c of=/dev/null bs=1m count=4096 4096+0 records in 4096+0 records out 4294967296 bytes transferred in 178.795312 secs (24021700 bytes/sec) 54 [negara] (root) # dd if=/dev/rda0c of=/dev/null bs=1m count=4096 skip=2047 4096+0 records in 4096+0 records out 4294967296 bytes transferred in 179.872815 secs (23877801 bytes/sec) dd refuses to skip more than 2GB, so I cannot continue here ... but: 60 [negara] (root) # rawio -c 128 /dev/rda0c Random read Sequential read Random write Sequential write ID K/sec /sec K/sec /sec K/sec /sec K/sec /sec anon 6790.6 103 14491.1 221 61 [negara] (root) # rawio -c 144 /dev/rda0c Random read Sequential read Random write Sequential write ID K/sec /sec K/sec /sec K/sec /sec K/sec /sec anon 6777.9 92 13295.9 180 62 [negara] (root) # rawio -c 192 /dev/rda0c Random read Sequential read Random write Sequential write ID K/sec /sec K/sec /sec K/sec /sec K/sec /sec anon 7163.9 73 14467.4 147 rawio -c 256 causes bad reads on the disk. Joerg -- Joerg B. Micheel Email: Waikato Applied Network Dynamics Phone: +64 7 8384794 The University of Waikato, CompScience Fax: +64 7 8384155 Private Bag 3105 Pager: +64 868 38222 Hamilton, New Zealand Plan: TINE and the DAG's To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message