From owner-freebsd-scsi Mon Mar 25 15:51:21 1996 Return-Path: owner-freebsd-scsi Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id PAA18720 for freebsd-scsi-outgoing; Mon, 25 Mar 1996 15:51:21 -0800 (PST) Received: from irz301.inf.tu-dresden.de (irz301.inf.tu-dresden.de [141.76.1.11]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id PAA18712 for ; Mon, 25 Mar 1996 15:51:15 -0800 (PST) Received: from sax.sax.de by irz301.inf.tu-dresden.de (8.6.12/8.6.12-s1) with ESMTP id AAA16288; Tue, 26 Mar 1996 00:50:54 +0200 Received: by sax.sax.de (8.6.11/8.6.12-s1) with UUCP id AAA14022; Tue, 26 Mar 1996 00:50:55 +0100 Received: (from j@localhost) by uriah.heep.sax.de (8.7.4/8.6.9) id AAA11347; Tue, 26 Mar 1996 00:39:26 +0100 (MET) From: J Wunsch Message-Id: <199603252339.AAA11347@uriah.heep.sax.de> Subject: Re: HP 4020i CD-R wishes To: freebsd-scsi@freebsd.org Date: Tue, 26 Mar 1996 00:39:25 +0100 (MET) Cc: robsch@robkaos.ruhr.de (Robert Schien) Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) In-Reply-To: from "Robert Schien" at Mar 25, 96 06:57:59 pm X-Phone: +49-351-2012 669 X-Mailer: ELM [version 2.4 PL24 ME8a] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-scsi@freebsd.org X-Loop: FreeBSD.org Precedence: bulk As Robert Schien wrote: > > Well, not only for the HP drive, but this is the CD-R drive I have :-) > I would like to read audio tracks from an audio CD. Writing is > no problem with 'wormcontrol', but how to read? /dev/rworm0 seems > to be write only (at least dd if=/dev/rworm0 ... gives an I/O error). /dev/rworm0 should also be readable. I'm not even sure why it doesn't work (it's supposed to). /dev/worm0 should also be added. There's still the problem that apparently nobody has got a bright idea on how to `clone' the `cd' driver for the `worm' class of devices. CD-R's are a true superclass of CD-ROM, so duplicating the CD-ROM functionality inside the worm driver doesn't seem to make sense. > Another point: how to create multisession discs so that things > like incremental backup is possible? All you need is specifying the ``onp'' parameter in the ``fixate'' command of wormcontrol(8). Very easy, indeed. You'll have a hard time reading the sessions 1 thru N however. :-P (Our CD-ROM driver simply can't do it by now, and the SCSI-2 spec doesn't specify the required commands.) -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)