Seagate 1080SL manual Medalist 1080sl Scsi Installation Guide, August

Medalist 1080sl SCSI Installation Guide, August 1995 9

nators enabled. If you are positioning the drive at the end of the cable, you must enable the drive’s internal terminators or attach an external terminator to the end of the cable. Terminators on the devices between the bus ends must be disabled or removed.

∙To enable the drive’s terminators, leave the pin-pair 19 and 20 on jumper block J8 open.

∙To disable the terminators, place a jumper on pins 19 and 20 of jumper block J8.

Terminator power. The terminators must have a 5 volt power source to be active. In general, the device that provides the terminator also provides power for its terminator. Power for the terminator may also be supplied through the SCSI cable (this is usually done for external terminators). The Seagate drive pro- vides settings for four implementations of terminator power:

∙Terminator power to the drive terminator and the SCSI bus— install jumpers on pins 21 and 23 and on pins 22 and 24 of J8. This is the default.

∙Terminator power to the drive terminators only—install a jumper on pins 23 and 24 of J8.

∙Terminator power from another device to the bus and the drive’s terminator disabled—install a jumper on pins 21 and 23 of J8.

∙Terminator power to the bus only and the drive terminator disabled—install a jumper on pins 22 and 24 of J8.