Date: Thu, 02 Jul 1998 16:39:33 +0200 From: The Mad Maniac <TMM@infothuis.nl> To: questions@FreeBSD.ORG Subject: Re: Can't install due to cdrom player used for install Message-ID: <359B9BA5.CCCD7F19@infothuis.nl> References: <199807021212.IAA20796@spoon.beta.com>
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Brian J. McGovern wrote: > > I've had similar problems with almost every SCSI CDROM install I've ever done. > >From my experience, it appears that almost every SCSI CD ROM will bomb itself > out when you use the default configurations on the 2940UW, which in turn seems > to cause the bus to reset, which hoses up (or at least slows down) all the > other devices on the chain. > > The 'fix' I've found is to go in to the Adaptec BIOS (usually CTRL-A on boot), > and crank down the settings for the affected SCSI devices. Turn off wide > negotiation, sync negotiation, and the ability to disconnect, and then crank > the SYNC speed down as low as it will go on all of your CDROM devices. > > This will _usually_ give you a working configuration, although in my last > round of installs on a Pentium II, I also had to drop the sync speeds from > 20MB/s to 16MB/s on my UW drives, because it was still causing the SCSI bus > to reset frequently. > > Anyhow, once you've got your system running at a 'minimal speed', you can > experiment with ramping up some of the other settings (such as disconnect and > SYNC negotiation) until you get the fastest, stable drive configuration you > can. I've yet to see a SCSI CD rom that survives Ultrawide negotiation being > turned on. > > And this isn't just a 'FreeBSD' problem. I've locked up Win 95, NT, and DOS > so many times due to the SCSI bus going out to lunch that I almost returned > five machines before I realized what it was. Luckily, the Yamaha CD-RW drive Hm.. i must say that under DOS/wind95/NT i never ever had any troubles with this, neither under OS/2 (yes i try out alot :) It's only FreeBSD that can't seem to use it correctly. But i will try as you suggested and hope that will fix it temporarily at least, and if not, i just have to put in an ide drive lying around somewhere. It's a very old cdrom player, and does everything it is supposed to do, even keeps my cd's in one piece. What i find frusty is that i took this cdrom to be rid of ide/scsi probs :) > > You think they'd have figured out how to fix that by now :) > -Brian thanks! Floris To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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