Installing external tape drives Checking SCSI Termination

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NOTE: Be sure the upper 8 data bytes of the 68-pin cable are properly terminated.
Checking SCSI Termination
If the external tape drive is the last or only device in the SCSI chain, install a terminating plug on the
unused SCSI connector on the drive’s back panel. This terminator typically is a small, rectangular
plastic block that is marked SCSI Terminator. Figure12 on page 38 shows two examples of using
SCSI termination.
FIGURE 12. Two SCSI Termination Examples for the External Tape Drives
Connecting a Power Cable
To connect a power cable to the external tape drive:
1. Connect a power cable to the AC power connector on the back of the external tape drive (see
Figure 11 on page 35).
2. Connect the other end of the power cable to a working AC outlet.
NOTE: Choose an AC outlet that is not controlled by a wall switch, which can turn off
power to the AC outlet and to the external tape drive.
External
Tape Drive
SCSI Controller
(termination enabled)
External
SCSI device
External
Tape Drive
SCSI Terminators
SCSI Controller
(termination disabled)
Internal
SCSI device
(
termination
enabled
)
Example 1: SCSI termination
in a system that has only
external SCSI devices.
External
SCSI device
Example 2: SCSI termination
in a system that has both
internal and external SCSI
devices.