From owner-freebsd-questions@FreeBSD.ORG Mon Aug 22 20:33:54 2005 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id C547C16A41F for ; Mon, 22 Aug 2005 20:33:54 +0000 (GMT) (envelope-from Emanuel.strobl@gmx.net) Received: from mail.gmx.net (pop.gmx.net [213.165.64.20]) by mx1.FreeBSD.org (Postfix) with SMTP id 44D7543D45 for ; Mon, 22 Aug 2005 20:33:52 +0000 (GMT) (envelope-from Emanuel.strobl@gmx.net) Received: (qmail invoked by alias); 22 Aug 2005 20:33:52 -0000 Received: from flb.schmalzbauer.de (EHLO cale.flintsbach.schmalzbauer.de) [62.245.232.135] by mail.gmx.net (mp022) with SMTP; 22 Aug 2005 22:33:52 +0200 X-Authenticated: #301138 From: Emanuel Strobl To: freebsd-questions@freebsd.org Date: Mon, 22 Aug 2005 22:33:25 +0200 User-Agent: KMail/1.8.1 References: <007301c5a755$ea1ee840$6701a8c0@monster> In-Reply-To: <007301c5a755$ea1ee840$6701a8c0@monster> X-Birthday: Oct. 6th 1972 X-CelPhone: +49 (0) 173 9967781 X-Tel: +49 (0) 89 18947781 X-Country: Germany X-Address: Munich, 80686 X-OS: FreeBSD MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart2216605.U0cI73Cd37"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Message-Id: <200508222233.37041@harrymail> X-Y-GMX-Trusted: 0 Cc: Sebastian Pahlke Subject: Re: dd is so slow on my SCSI disc X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 22 Aug 2005 20:33:54 -0000 --nextPart2216605.U0cI73Cd37 Content-Type: text/plain; charset="iso-8859-15" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Am Montag, 22. August 2005 22:13 CEST schrieb Sebastian Pahlke: > Hi all, > > I'm trying to "clean" a disc before selling them: > > dd if=3D/dev/zero of=3D/dev/da0 > > Do I make something wrong because the transfer rate is only 60932 > bytes/sec??? These are 60 kbytes/sec, slower than my internet > connection!!! > > :( > > I tried to increase the block size, with bs=3D32768 I get 3416071 > bytes/sec. But this is still very poor. The system is a PIII 800MHz and > a SCSI-3 disc in single user mode booted from FreeBSD release 5.4 > live-cd. > > Any ideas how to analyze this? Thanks in advance! Hmm, what dows systat (-vm 1) tell you? What's the disk load, maybe you're= =20 suffering from interrupt storms? I can't you help much with specific SCSI=20 parts, but maybe you want to try 6.0-BETA3, if I remember correctly there=20 were some adaptec problems fixed... =2DHarry > > greetings, > > Sebastian Pahlke > > > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to > "freebsd-questions-unsubscribe@freebsd.org" --nextPart2216605.U0cI73Cd37 Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (FreeBSD) iD8DBQBDCjagBylq0S4AzzwRAu/sAJ4/Y49HoVmpzMKiHMC9lKv0Qd+jewCdFY7J h8xfI+XUIPglfqSmUZpIVj0= =T5gi -----END PGP SIGNATURE----- --nextPart2216605.U0cI73Cd37--