What are the basic points of SCSI termination and IDing?
This is a delicate and crucial argument that stands right in the heart of a stable scsi chain. I have seen many people connecting/disconnecting, moving and rearranging devices in the same SCSI chain or from one chain to another without even bothering to check the terminations just as if they didn’t even exist! Ofcourse this always lead to device malfunction or even failure at some point of the day and that’s when I come in:) Actually it is not so difficult once you have got the message, so here we go: the first and last devices in a scsi chain are the devices that are at the TWO EXTREMES of the scsi cable. In this way if you have a PC-ZIP-AKAI chain the PC’s host adaptor is the first or last device and the AKAI is the last or first device. The zip is in between thus must *NOT* be terminated. In the other case, if we have an INTERNAL ZIP-SCSI ADAPTER-AKAI then the first and last devices are the ZIP and the AKAI. People tend to “forget” that the scsi host adaptor IS a scsi device with it
