From owner-freebsd-questions Sun Apr 22 4: 5:57 2001 Delivered-To: freebsd-questions@freebsd.org Received: from mr200.netcologne.de (mr200.netcologne.de [194.8.194.109]) by hub.freebsd.org (Postfix) with ESMTP id 3A35737B424 for ; Sun, 22 Apr 2001 04:05:53 -0700 (PDT) (envelope-from pherman@frenchfries.net) Received: from husten.security.at12.de (dial-213-168-89-177.netcologne.de [213.168.89.177]) by mr200.netcologne.de (Mirapoint) with ESMTP id AED04847; Sun, 22 Apr 2001 13:05:51 +0200 (CEST) Received: from localhost (localhost.security.at12.de [127.0.0.1]) by husten.security.at12.de (8.11.3/8.11.3) with ESMTP id f3MB5hl30617; Sun, 22 Apr 2001 13:05:43 +0200 (CEST) (envelope-from pherman@frenchfries.net) Date: Sun, 22 Apr 2001 13:05:43 +0200 (CEST) From: Paul Herman To: Schlenker Cc: Subject: Re: Duplicating Audio CDs In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Sun, 22 Apr 2001, Schlenker wrote: > > I tried using /dev/acd0c (which is what the link points to) just in > > case but it made no difference :( > > When using dd with a data cd, you must use the raw device e.g. /dev/racd0c Just an aside: While this is true for most Unicies, FreeBSD 4.x no longer uses block devices, so AFAIK, there is no difference anymore. They both require block sized (512-byte) transfers. bash-2.04$ ls -l /dev/*acd0c | more crw-r----- 2 root operator 117, 2 Mar 31 23:38 /dev/acd0c crw-r----- 2 root operator 117, 2 Mar 31 23:38 /dev/racd0c bash-2.04$ dd if=/dev/rad0s2c of=/dev/null bs=511 count=1 dscheck(#ad/0x30002): b_bcount 511 is not on a sector boundary (ssize 512) dd: /dev/rad0s2c: Invalid argument 0+0 records in 0+0 records out 0 bytes transferred in 0.001602 secs (0 bytes/sec) bash-2.04$ dd if=/dev/rad0s2c of=/dev/null bs=512 count=1 1+0 records in 1+0 records out 512 bytes transferred in 0.020989 secs (24394 bytes/sec) Same goes for /dev/ad0s2c. This might be different for non-block devices... -Paul. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message