SCSI Address Determination
Drive Termination
The SCSI bus will need to be terminated at both ends of the bus. The Ultrastar 9LZX and 18ZX do not
have onboard active termination. You will need to supply an external Ultra2 compatible terminator.
Termination Power
Some controllers may require the drive to supply 5 volts of power to the bus to in termination. If your
controller requires this, place a jumper on the Termination Power Enable jumpers to the side of the
jumper block. These pins require a 2.54mm jumper shunt.
Auxiliary Option Jumper Block
The 68 pin models contain an “auxiliary” connector that replicates some of the functions contained in the
front option jumper block. Either the front option block or the auxiliary option block may be used, but not
both.
Additional Jumper Options
The Ultrastar drives offer additional options on the jumper block. See the appendix for details of the
additional jumper options shown below.
IBM storage products
Page 9
IBM Hard Disk Drive Technical Support Center version 1.0
