Compaq AA-RHGWC-TE manual Library electronics a

8.13.3.4 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, you cannot 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. You must terminate each SCSI bus at the end of the SCSI bus by installing a terminator on the SCSI bulkhead SCSI connector. Therefore, you must ensure that the ESL9326D Enterprise Library is on the end of the shared SCSI bus in TruCluster Server configurations.

______________________ Note _______________________

We recommend that you put disk storage devices 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. The entire shared SCSI bus, including ESL9326 internal cables, cannot exceed 25 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 indicated in Table 8–21 to form shared SCSI buses.

Table 8–21: 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.

Configuring a Shared SCSI Bus for Tape Drive Use 8–77