From owner-freebsd-multimedia Wed Mar 21 6:45:50 2001 Delivered-To: freebsd-multimedia@freebsd.org Received: from musique.teaser.fr (musique.teaser.net [213.91.2.11]) by hub.freebsd.org (Postfix) with ESMTP id 1D66B37B735 for ; Wed, 21 Mar 2001 06:45:47 -0800 (PST) (envelope-from jaco@teaser.fr) Received: from titine.fr.eu.org (Cour-N1D45-006.teaser.net [213.91.45.6]) by musique.teaser.fr (Postfix) with ESMTP id 246AD72526 for ; Wed, 21 Mar 2001 15:44:32 +0100 (CET) Received: by titine.fr.eu.org (Postfix, from userid 1001) id 54B79331A; Wed, 21 Mar 2001 15:43:51 +0100 (CET) X-Attribution: Jaco To: multimedia@FreeBSD.ORG Subject: Re: burncd and ISO copies References: <86lmq09not.fsf@titine.fr.eu.org> <200103202100.WAA29441@freebsd.dk> <200103211206.f2LC63911963@dungeon.home> From: Eric Jacoboni In-Reply-To: <200103211206.f2LC63911963@dungeon.home> (Stephen McKay's message of "Wed, 21 Mar 2001 22:06:03 +1000") User-Agent: Gnus/5.090001 (Oort Gnus v0.01) Emacs/21.0.100 Date: 21 Mar 2001 15:43:51 +0100 Message-ID: <86y9tz2ndk.fsf@titine.fr.eu.org> Lines: 30 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Sender: owner-freebsd-multimedia@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org >>>>> "Stephen" == Stephen McKay writes: Stephen> Really? I always use 2k with CDs because I lose data at the Stephen> end of the CD with anything bigger. Some problem with Stephen> detecting the end of the CD it seems. I've no such problem with my CD and CDRW drives (both ATA), the speed increases with the block size, that's all: The CD: $ dd if=/dev/racd0c bs=2k of=/dev/null 325277+0 records in 325277+0 records out 666167296 bytes transferred in 152.378786 secs (4371785 bytes/sec) $ dd if=/dev/racd0c bs=4k of=/dev/null 162638+1 records in 162638+1 records out 666167296 bytes transferred in 129.569401 secs (5141394 bytes/sec) $ dd if=/dev/racd0c bs=8k of=/dev/null 81319+1 records in 81319+1 records out 666167296 bytes transferred in 129.322487 secs (5151210 bytes/sec) It seems block sizes bigger than 8k give slower transferts... -- Éric Jacoboni, né il y a 1288545673 secondes. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-multimedia" in the body of the message