Date: Mon, 22 Aug 2005 22:33:25 +0200 From: Emanuel Strobl <Emanuel.strobl@gmx.net> To: freebsd-questions@freebsd.org Cc: Sebastian Pahlke <sp.ibm@gmx.de> Subject: Re: dd is so slow on my SCSI disc Message-ID: <200508222233.37041@harrymail> In-Reply-To: <007301c5a755$ea1ee840$6701a8c0@monster> References: <007301c5a755$ea1ee840$6701a8c0@monster>
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--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--
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