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Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!news.rmit.EDU.AU!news.unimelb.EDU.AU!munnari.OZ.AU!news.ecn.uoknor.edu!news.wildstar.net!news.ececs.uc.edu!news.kei.com!news.mathworks.com!fu-berlin.de!irz401!orion.sax.de!uriah.heep!news From: j@uriah.heep.sax.de (J Wunsch) Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: CD writer software? Date: 11 Feb 1997 22:48:06 GMT Organization: Private BSD site, Dresden Lines: 32 Message-ID: <5dqsv6$pkl@uriah.heep.sax.de> References: <E4vGKJ.LKp@fsa.bris.ac.uk> <5d0ik6$2u5@uriah.heep.sax.de> <E58GA8.7wL@fsa.bris.ac.uk> <E5E750.7DE@fsa.bris.ac.uk> <33003DC8.237C228A@freebsd.org> Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) NNTP-Posting-Host: localhost.heep.sax.de Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-Newsreader: knews 0.9.6 X-Phone: +49-351-2012 669 X-PGP-Fingerprint: DC 47 E6 E4 FF A6 E9 8F 93 21 E0 7D F9 12 D6 4E Xref: euryale.cc.adfa.oz.au comp.unix.bsd.freebsd.misc:35501 "Jordan K. Hubbard" <jkh@FreeBSD.org> wrote: > > I see that wormcontrol supports multi session recording. Is it > > possible to use mkisofs to record multiple sessions. I'd like to be > > Well, this has little to do with mkisofs, which just produces file > system images that you're free to write to any old place, it's more a > question of sending the right stuff to the drive with wormcontrol. I've This time you err... What ISO 9660 calls ``multi-session'' is not only multi-session in that it consists of more than one recording session on the CD (with at most 1 CD-ROM data track as per ISO 9660), but also that the directory of any more recent session is free to back-reference older files from other (previous) tracks. This is done by always addressing the CD in absolute block numbers (that's where the tracks of a multi-session CD are being handled differently from a normal disk partition). The idea behind this is that you could `shadow' the old files and only need to replace those in the data track of your new session that have been changing since the older sessions were recorded. Naturally, this requires cooperation on the part of the ISO 9660 filesystem tool, since it needs to know about the history of the CD. -- 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. ;-)