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14. Press and release the up or down button and the SELECT button
simultaneously and verify that System On-line or System Off-line
is displayed in the SDA.
8.8.3 TL894 Tape Library Internal Cabling
The default internal cabling configuration for the TL894 tape library has the
robotics controller and top drive (drive 0) on SCSI bus port 1. Drive 1 is on
SCSI bus port 2, drive 2 is on SCSI port 3, and drive 3 is on SCSI bus port 4.
A terminator (part number 0415619) is connected to each of the drives to
provide termination at that end of the SCSI bus.
This configuration, called the four-bus configuration, is shown in
Figure 8–11. In this configuration, each of the tape drives, except SCSI bus
drive 0 and the robotics controller, requires a SCSI address on a separate
SCSI bus. The robotics controller and drive 0 use two SCSI IDs on their
SCSI bus.
Figure 8–11: TL894 Tape Library Four-Bus Configuration
Robotics Controller
*SCSI Address 0
Rear Panel
Host
Connection #1
SCSI Port 1
SCSI Port 2
SCSI Port 3
SCSI Port 4
Tape Drive 0
*SCSI Address 2
Tape Drive 1
*SCSI Address 3
Tape Drive 2
*SCSI Address 4
Tape Drive 3
*SCSI Address 5
Tape Drive
Interface PWA
SCSI Cable
1.5m
SCSI Cable
3m
Internal SCSI
Termination #1
Internal SCSI
Termination #2
Internal SCSI
Termination #3
Internal SCSI
Termination #4
Rear Panel
Host
Connection #2
Rear Panel
Host
Connection #3
Rear Panel
Host
Connection #4
ZK-1324U-AI
* - Indicates the "default" SCSI ID of the installed devices
You can reconfigure the tape drives and robotics controller in a two-bus
configuration by using the SCSI jumper cable (part number 6210567)
supplied in the accessories kit shipped with each TL894 unit. Remove the
terminator from one drive and remove the internal SCSI cable from the
Configuring a Shared SCSI Bus for Tape Drive Use 8–33