Compaq AA-RHGWB-TE manual 68Configuring a Shared Scsi Bus for Tape Drive Use

8.12.3.4 Connecting the ESL9326D Enterprise Library to the Shared SCSI Bus

The ESL9326D Enterprise Library has 5 meters of internal SCSI bus cabling for each pair of tape drives. Because of the internal SCSI bus lengths, it

is not possible to use a trilink connector or Y cable to terminate the SCSI bus external to the tape library as is done with other devices on the shared SCSI bus. Each SCSI bus must be terminated at the end of the SCSI bus by installing a terminator on the SCSI bulkhead SCSI connector. Therefore, TruCluster Server configurations using the ESL9326D Enterprise Library must ensure that the tape library is on the end of the shared SCSI bus.

______________________ Note _______________________

We recommend that disk storage devices be placed on separate shared SCSI buses.

Use 328215-001 (5-meter), 328215-002 (10-meter), 328215-003 (15-meter), 328215-004 (20-meter), or BN21K (BN21L) cables of the appropriate length to connect the ESL9326D Enterprise Library to a shared SCSI bus. Do not use a cable longer than 20 meters. Terminate each SCSI bus with

a 330563-001 (or H879-AA) HD-68 terminator. Connect the cables and terminator on the SCSI bulkhead SCSI connectors as shown in Table 8–14 to form shared SCSI buses.

Table 8–14: Shared SCSI Bus Cable and Terminator Connections for the ESL9326D Enterprise Library

Tape Drives on Shared	Connect SCSI Cable	Install HD68 Terminator
SCSI Bus	to Connector:	on Connector:
0, 1, and library electronicsa	Q	B
2, 3	C	D
4, 5	E	F
6, 7	G	H
8, 9	I	J
10, 11	K	L
12, 13	M	N
14, 15	O	P

aInstall .3-meter jumper cable part number 330582-001 between SCSI connectors R and A to place the library electronics on the SCSI bus with tape drives 0 and 1.

8–68Configuring a Shared SCSI Bus for Tape Drive Use