Date: Mon, 15 Dec 1997 09:39:56 -0800 (PST) From: Doug White <dwhite@gdi.uoregon.edu> To: reptco@chicagonet.net Cc: scsi@freebsd.org Subject: Re: BSD 2.2.5 - ahco board is not responding Message-ID: <Pine.BSF.3.96.971215093522.292A-100000@gdi.uoregon.edu> In-Reply-To: <199712142001.7134900@Chicago>
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On Sun, 14 Dec 1997 reptco@chicagonet.net wrote: > I have tried a number of things this weekend, and still no luck. I am > still getting the same messages of my ach0 board not responding. ach0: board not responding Try removing devices from the chain until stuff starts working. You may have an evil device. > The first question I have is this - My adaptec card has both a UW port > which the hard drive is connected to, and then a 50 pin port which the > CD-ROM and tape drive are connected to. I have the CD-ROM drive > terminated, and the Hard drive terminated. This is how the chain looks: > > [Hard drive (T)] ==========[ 68 pin controller port] ====== > [50 pin controller port]=====[tape drive]=====[CD ROM drive (T)] Hm, even if the wide and narrow chains are separate, the termination would still be correct. > I have tried leaving the Adaptec BIOS "Plug & Play SCAM support" > enabled, with the termination set to Automatic, and I have tried > DISABLING the SCAM support with the termination set to > Low Off High On like the adaptec manual says I should have for someone > using both ports. Did you try this combo with auto termination? > My other question - I have had trouble with other operating systems > recognizing the last 1.6G of my drive. If somehow BSD can get far > enough to install, will it have any problems installing on this part of > the 9.1G drive? That is a BIOS limitation, FreeBSD won't have any problems. Make sure that the root partition is below the 8gb mark though or the BIOS won't be able to see it to boot it. > > Is there anything else I can try? I'm forwarding this on to scsi@freebsd.org, the SCSI experts. I suspect we need to enable some debugging options and really figure out what's going on. I'm leaving this stuff on here for their reference: > > > Hi Doug. I have set no termination on any of the devices - they are as they > came out of the box. On the > > 2940 - in its bios I have it set to autotermination. > > > > OK, that is your problem. You must have both ends of the SCSI chain > > terminated. Leaving autodetect on the Adaptec is OK, this way if you > > attach external devices through the port it'll switch it off. Make sure > > that any external devices you attach have termination enabled though. > > > > For instance, let's say your SCSI chain is set up as follows: > > > > [ controller ] ==== [ disk ] ===== [ tape ] ==== [ CDROM ] > > > > You must enable termination on the controller and the CDROM. Termination > > should be disabled on the disk and the tape. If a device allows you to > > set termination power source, make sure termination power comes from the > > bus. My Seagate disk has this but it's jumpered to bus by default. > > > > > Does BSD not work well with the autotermination of the adaptec card? > > > > It's a hardware thing, actually. FreeBSD could care less. It may be that > > the DOS software is less picky, but in fact your setup is incorrect. > > > > > Are you telling me I need to turn that termination off in the bios, and > > > manually terminate the 2940 and the last device on the chain? Is that > > > the only way I will be able to install BSD?? > > > > In order, no and yes. Otherwise you are violating SCSI spec. See > > your Adaptec's manual. > > > > At the same time, check your SCSI cable; if it's beat up or way too long > > for your needs, try replacing it. > > > > Doug White | University of Oregon > > Internet: dwhite@resnet.uoregon.edu | Residence Networking Assistant > > http://gladstone.uoregon.edu/~dwhite | Computer Science Major > > > > > Wayne > reptco@chicagonet.net > Doug White | University of Oregon Internet: dwhite@resnet.uoregon.edu | Residence Networking Assistant http://gladstone.uoregon.edu/~dwhite | Computer Science Major
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