On 28/08/05, John Derbyshire <[EMAIL PROTECTED]> wrote: > I've tried putting the CD 300 as a peripheral in the chain which now > goes: parallel port on the Mac, parallel to SCSI cable, CD 300, SCSI to > SCSI cable, SCSI terminator, HP interface box, SCSI to parallel cable, > HP scanner. The chain works because the Mac can see the scanner at the > end but not the CD 300 in the middle. So what am I missing here? > At the risk of sounding pedantic, 'parallel' has no place in this situation. You have a 25 pin SCSI connector on the Mac and a 50 pin centronics style connector for the CD 300. Parallel is an entirely separate interface used by PCs. > > On 28 Aug 2005, at 13:31, Andrew Rodger wrote: > > > > > You probably know all this but.....with SCSI chains there needs to be > > a terminator at the end of the line, even with a chain of one. Many > > scanners have inbuilt termination, selectable on the back, though I am > > not sure the CD300 does. Are there two sockets on the back of the CD > > drive? If so, you can use one of these for a plug in terminator if the > > CD drive does not have built in termination. If you are running the > > scanner and the CD drive together, if you put the CD drive in the > > chain between the LC and the scanner it should sit there and work > > fine as the chain is terminated by the scanner. SCSI can be very fussy > > and it is often worth experimenting though it is best to power down > > the appliances before plug swapping. > > I can confirm that Apple's external CD drives never had internal termination. The old utility SCSI Probe might be useful here. -- http://www.m4mac.co.uk Help, Troubleshooting, Coaching for Mac Users 07958 773472
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