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Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!news.bhp.com.au!mel.dit.csiro.au!munnari.OZ.AU!news.ecn.uoknor.edu!news.uoknor.edu!news.nodak.edu!netnews1.nwnet.net!news.u.washington.edu!uw-beaver!uhog.mit.edu!news.mathworks.com!fu-berlin.de!news.dfn.de!news.uni-jena.de!news.HRZ.HAB-Weimar.DE!News.HTWM.De!news.tu-chemnitz.de!irz401!uriah.heep!news From: j@uriah.heep.sax.de (J Wunsch) Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: One more try... CD-R writing from FreeBSD Date: 26 Jan 1996 23:25:39 GMT Organization: Private BSD site, Dresden Lines: 37 Message-ID: <4ebntj$ke2@uriah.heep.sax.de> References: <neIKwIf@quack.kfu.com> <DLnEJJ.367@robkaos.ruhr.de> <jlemonDLovJz.J6K@netcom.com> 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 0.9.3 jlemon@netcom.com (Jonathan Lemon) writes: > I'm in the process of setting up a machine just for the purpose of > archiving and retrieving old reports, so I would really, _REALLY_ > like to see a CDR driver under FreeBSD. Work in progress. > The machine in question will have an Adaptec 2940 controller, a > Yamaha CDR-100 recorder, and the CDROM image will be written from a > Barracuda disk. (This should be fast enough to keep up with the > recording rate, right?) I would be willing to help test a driver > after we get the machine (in the next month or so). You don't really need a fast disk to cope with the sluggish burners. Double speed is 360 KB/s, so almost any SCSI disk should remain mostly idle while feeding a CD-R. The only problem is that the CD-R needs a constant data flow, and the most dangerous activity is random but heavy disk load (swap!) happening at the same time where the disk should better feed the CD-R writing process. Even raising the scheduling priority (rtprio(1)) doesn't help here. You would run best by leaving a single disk just for feeding the CD-R, and another one for all the rest. This should even allow you for running full multi-user. Sorry, the Yamaha won't be the first CD-R supported by FreeBSD. This will most likely be a Plasmon RF4100 (it already sorta works), closely followed by an HP device (Jordan's already sitting on this one...). They are both rather similar, while the Yamaha is _vastly_ different. -- 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. ;-)