Compaq AA-RHGWC-TE manual 12 TL894 Tape Library Four-Bus Configuration

Figure 8–12: TL894 Tape Library Four-Bus Configuration

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

Internal SCSI Termination #1

Internal SCSI Termination #2

Internal SCSI Termination #3

Robotics Controller

*SCSI Address 0

SCSI Cable 1.5m

	Rear Panel
	Host
	Connection #4
SCSI Port 4	Rear Panel
	Host
	Connection #3
SCSI Port 3	Rear Panel
	Host
	Connection #2

SCSI Port 2

Internal SCSI Termination #4

SCSI Cable 3m

Rear Panel

Host

Connection #1

SCSI Port 1

* - Indicates the "default" SCSI ID of the installed devices

ZK-1324U-AI

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 other drive to be daisy chained. Use the SCSI jumper cable to connect the two drives and place them on the same SCSI bus.

______________________ Notes ______________________

We recommend that you not place more than two TZ89 tape drives on any one SCSI bus in these tape libraries. We also recommend that storage be placed on shared SCSI buses that do not have tape drives.

Therefore, we do not recommend that you reconfigure the TL894 tape library into the one-bus configuration.

Appendix B of the TL81X/TL894 Automated Tape Library for DLT Cartridges Facilities Planning and Installation Guide provides figures showing various bus configurations. In these figures, the configuration changes have been made by removing the terminators from both drives, installing the SCSI bus jumper cable on the drive connectors vacated by the terminators, then

8–40Configuring a Shared SCSI Bus for Tape Drive Use