Whatever device is at the end of the cable must (or at least Should) be
terminated.
Assuming you don't have an active terminator, ie. a little tiny module plugged
into the first open connector after the last device on the cable, then you'll have
to fiddle the termination.
Since the hard drive is so small, I'm assuming it's not LVD. I could be wrong
but you haven't told us what drive you have.
LVD SCSI drives have no onboard termination and require the active terminator
I mentioned above. Smaller, slower, older, non LVD drives, and non HVD drives
can be terminated by jumpers on the hard drive. Download the .pdf file for your
drive and see what jumpers are for termination and make sure it's not an LVD drive,
that is it's interface speed will be LESS than 80meg/sec.
If the CDROM is at the end of the cable, farthest down the cable from the PCI card,
then it is jumpered for termination. Pull the CDROM and jumper the hard drive for
termination and you'll be fine. You don't have to mess with the SCSI BIOS as it
will not see a device other than the hard drive anyway.
If the hard drive is on the end of the cable, with no active terminator after it, then
it is already jumpered for termination. Just pull the SCSI CD from the cable and
4pin molex power connector and you're all set to go.
I'd install the IDE CDROM and set it to boot from it in the motherboard BIOS with
the SCSI drive as the secondary boot device. That way if you want to boot a CD
you just put it in the drive. If you want to boot scsi, just don't have a bootable CD
in the IDE CDROM.
I have a Tyan Tahoe 2 motherboard this is running the floppy disk. The
hard drive (Seagate 2gb) and the CD-ROM are run off a SCSI PCI card.
The CD-ROM is about to crap-out on me and I was wondering if I can
pull it out and then enable one or both of the IDE interfaces in the
BIOS and then hook-up an IDE CD-ROM unit?
If this is possible, would I have to reposition the hard drive on the
SCSI cable, or just unplug the CD-ROM and run? I might have to sneak
into the SCSI BIOS and disable the CD-ROM in there, huh?
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