Date: Thu, 25 Feb 1999 16:20:20 +1100 From: Bruce Evans <bde@zeta.org.au> To: beyssac@enst.fr, freebsd-current@FreeBSD.ORG Subject: Re: IDE CDROM not found with PIIX4 chipset, -current kernel Message-ID: <199902250520.QAA14623@godzilla.zeta.org.au>
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>I've been having problems with an IDE controller on my motherboard. >I can't seem to be able to get it to recognize a CDROM drive (it's >the only device plugged on the second IDE controller). The kernel >seems to timeout on that second controller during the probe phase. >Maybe that's one of the infamous PIIX 4 bugs... The machine is a >Dell Optiplex. That's one of the infamous FreeBSD bugs :-). The wd probe has never really supported cdrom drives. It works best when there is an ordinary drive on the master and a cdrom drive on the slave. Then it essentially doesn't see the slave, and control passes to the atapi probe which does support cdrom drives. It works worst with a cdrom master and no slave. Then it at first sees the master as a broken ordinary drive and times out attempting to reset it. Then it does a quick subprobe for a cdrom drive, and if it sees a cdrom drive then it doesn't see an ordinary drive and control passes to the atapi probe ... The subprobe apparently doesn't work for new drives. Bruce To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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