beautypg.com

8 terminator requirements, 9 terminator power, Terminator requirements – Seagate CHEETAH 15K.5 SCSI ST3146855LC User Manual

Page 77: Terminator power, Sections 10.8 and 10.9, Rface. see section 10.8 and section 10.9

background image

Cheetah 15K.5 SCSI Product Manual, Rev. J

71

10.8

Terminator requirements

Caution:

These drives do not have onboard internal terminators. The user, systems integrator or host equip-
ment manufacturer must provide a terminator arrangement external to the drive when termination is
required. For LW drives, terminator modules can be purchased that plug between the SCSI I/O
cable and the drive I/O connector or on the end of a short I/O cable stub extending past the last
cable connector. LC drives are designed to be plugged into a backpanel connector without cabling.

10.9

Terminator power

LW drives

You can configure terminator power from the drive to the SCSI bus or have the host adaptor or other device
supply terminator power to the external terminator. See Section 9.1 for illustrations that show how to place
jumpers for this configuration.

LC drives

These drives cannot furnish terminator power because no conductors in the 80-pin I/O connector are devoted
to terminator power.