From owner-freebsd-current Wed Feb 24 21:22:38 1999 Delivered-To: freebsd-current@freebsd.org Received: from godzilla.zeta.org.au (godzilla.zeta.org.au [203.26.10.9]) by hub.freebsd.org (Postfix) with ESMTP id 6E76C14E35 for ; Wed, 24 Feb 1999 21:21:58 -0800 (PST) (envelope-from bde@godzilla.zeta.org.au) Received: (from bde@localhost) by godzilla.zeta.org.au (8.8.7/8.8.7) id QAA14623; Thu, 25 Feb 1999 16:20:20 +1100 Date: Thu, 25 Feb 1999 16:20:20 +1100 From: Bruce Evans Message-Id: <199902250520.QAA14623@godzilla.zeta.org.au> To: beyssac@enst.fr, freebsd-current@FreeBSD.ORG Subject: Re: IDE CDROM not found with PIIX4 chipset, -current kernel Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG >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