Date: Sun, 22 Apr 2001 13:05:43 +0200 (CEST) From: Paul Herman <pherman@frenchfries.net> To: Schlenker <schlenke@fmi.uni-passau.de> Cc: <freebsd-questions@FreeBSD.ORG> Subject: Re: Duplicating Audio CDs Message-ID: <Pine.BSF.4.33.0104221255340.88695-100000@husten.security.at12.de> In-Reply-To: <Pine.SOL.4.32.0104221231210.740-100000@bender.fmi.uni-passau.de>
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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
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