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Newsgroups: comp.os.386bsd.questions Path: sserve!newshost.anu.edu.au!harbinger.cc.monash.edu.au!msuinfo!agate!howland.reston.ans.net!usenet.ins.cwru.edu!lerc.nasa.gov!purdue!mozo.cc.purdue.edu!staff.cc.purdue.edu!bj From: bj@staff.cc.purdue.edu (Ben Jackson) Subject: Re: SCSI CDROM doesn't work! Help Please Sender: news@mozo.cc.purdue.edu (USENET News) Message-ID: <Cr7qK6.G40@mozo.cc.purdue.edu> Date: Sat, 11 Jun 1994 03:19:18 GMT References: <2shl0o$t3a@news1.svc.portal.com> <2t640b$ao@knobel.knirsch.de> Organization: Purdue University Lines: 54 In article <2t640b$ao@knobel.knirsch.de>, Andreas Klemm <andreas@knobel.knirsch.de> wrote: >Yongxin - Yan (yan@shell.portal.com) wrote: >: I just bought a NEC SCSI CDROM but it doesn't work with FreeBSD 1.1! I have a NEC 500xp and it works fine with 1.1... Hopefully 1.1.5 will clear up the remaining problems. >: The SCSI controller I'm using is Adaptec 1542CF. I have a 1.08GB SCSI >: HD on which I installed FreeBSD 1.1. FreeBSD 1.1 boots and works OK. I have a similar configuration as well (same controller, large SCSI disk). >: FreeBSD detects the CDROM while booting. But it displays the following >: messages: (host adapter ID:7, SCSI HD ID:0, CDROM ID:4) >: cd0:(aha0:4:0) not ready >: cd0: could not get size >: cd0: drive empty There's no disc in the drive, right? >: If I try to mount a CDROM disk from /dev/cd0a, I get 'device not configured' >: message. The driver acts as if the device isn't configured until you put a disc in the drive. I found this very disconcerting at first as well. You might also try mounting '/dev/cd0d', since 'd' refers to the entire disc. Be sure to specify ISOFS. I patched the mount command to add the 'noauto' flag so I could leave a /cdrom mountpoint in my fstab. >Is that an internal or external CD-Rom ? The Adaptec 1542CF is very >sensitive concering proper scsi interface terminiation and cable >length/quality. Is perhaps something wrong with termination ... ? The 1542C is very touchy, the Cf is supposed to address these "problems" by adjusting the skew on the ACK line (if I remember my technobabble correctly). I've personally used a homemade cable with my 1542Cf and had no problems, and I can testify that it wasn't the world's best made cable (whoops! got that one upside down. guess I'll pull it and try again...). >Furthermore I read an article where somebody said, that in the Adaptec >Setup (press CNTL-A on startup) one switch has to be modified. > >Something with connect/disconnect ... don't know exactly ... >But perhaps this is a good hint or a new starting point for you. If you need to modify disconnection (enable or disable it), you hit Ctrl-A while the controller BIOS is probing the SCSI chain, and follow the glossy menus from there. The controller came configured correctly for mine. The only setting I've changed is the DMA transfer rate (my bus seems to handle 8.8M/s fine, so why hang out at 5M/s?). --Ben