On Fri, 27 Dec 2002, Michael D. Crawford wrote: > Could the original drive still be terminated after you have installed the > other > drives? It is probably worse to have extra termination than to have none at > all. Make sure you've got it right.
The original drive was NOT installed at the end of the chain. (The original Apple-branded CD-ROM drive was...) So I don't think termination would be an issue for this drive, no? How do I know if I got it right? I wish there was a "scsidiag" program that would say "Your termination sucks, try this; your SCSI IDs have a conflict, try this..." > > I think on my 8500 the original configuration had the boot drive in the > middle > of the bus, the CD drive at one end and the host bus adapter at the other > end. > The CD drive was terminated. > > If your CD drive is providing the termination there is probably a jumber that > you can remove. If your hard drive is terminated on the drive, there is > probably a resistor pack you can remove - although it is probably harder to > be > certain you're pulling the right thing off. > The thing that confuses me is thus: There are several termination options for the drive I placed at the end of the SCSI chain (read the Web page I referred to: http://www.seagate.com/support/disc/scsi/st15150n.html ). I do not know which ones are correct. "Terminate power from drive"? "Terminate power to SCSI bus"? I know nothing of these things. > There is a Mac OS utility called SCSI probe you might find helpful. The > version of it that Adaptec distributes is a pretty fancy version. I think it > might tell you if your bus is terminated correctly. I'm not sure but you > might > try it. Check at http://www.adaptec.com/ it should be available as a free > download. > > Mike > -- J e s s i c a L e a h B l a n k
