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Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!munnari.OZ.AU!news.ecn.uoknor.edu!news.wildstar.net!news.sdsmt.edu!news.mid.net!nntp.ksu.edu!news.physics.uiowa.edu!math.ohio-state.edu!howland.erols.net!news.sprintlink.net!news-peer.sprintlink.net!uunet!in1.uu.net!umcc.umich.edu!umcc.umcc.umich.edu!kli From: kli@umcc.umcc.umich.edu (Kelvin Li) Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: ATAPI CDROM Help needed: "atapi0.1: unknown phase" Date: 30 Oct 1996 02:21:45 GMT Organization: UMCC, Ann Arbor, MI, USA Lines: 26 Message-ID: <556e3p$qj9@umcc.umcc.umich.edu> References: <550cf7$9ka@umcc.umcc.umich.edu> <3275284F.46D8@nortel.ca> NNTP-Posting-Host: umcc.umcc.umich.edu X-Newsreader: TIN [version 1.2 PL2] Actually leaving in wd1 is fine so far. It just probes it after the wcd0 is configured. I guess my next question is since both CD-ROM and HD are sharing the same EIDE controller bus, is there going to be much of a performance degradation with bus arbitration, or is the bus pretty quiet when one device isn't doing anything? I can't imagine how DMA figures into the complexity of all of this. Explanations!?? Kelvin : In your kernel config file, make sure you've disabled wd1 ( second hard : disk, first : IDE controller ) or it will fight with the wcd0 driver for control of : the CDROM: : # comment me out! : # disk wd1 at wdc0 drive 1 : Hope this helps, : Andrew Atrens, : ( opinions mine, not Nortel's )