Originally posted by Vince77
( He was using an older controller, but I thought most SCSI equipment was supposed to be backwards and forewards compatible...?
Yes & no....a lot of 68 pin scsi drives, for example, are LVD (low voltage differential) & so require a lower voltage from the controller. They usually have a jumper that allows them to work with HVD controllers (or SE mode) but obviously that must be set otherwise the drive will fail.
So if your friend has an older controller, it probably won't have LVD capabilities. I'm guessing a bit though as I don't know whether your drives were LVD or not.
Theres plenty of other reasons for the drives not to be recognised, such as incorrect termination or more commonly, non-unique identifiers being set. All drives on a chain must have unique number between 0 and 7 or 0 & 14 depending on the scsi level used. ID 7 is normally used for the controller itself. If 2 devices on a single chain have the same ID set, only one or neither of the devices will be recognised.