IBM 7331, Installation Manual, Page: 37 / 62

Step 11. Dual Drive – Dual Host SCSI Configuration
T
T
T
Term inator
1
2
3
4
A
B
C
System Unit
System
Adapter
System Unit
System
Adapter
Tape Library
Backpanel
2
1
System-to-Device
SCSI Cable
RSCSI03-00
Figure 16. Dual Drive-Dual Host SCSI Configuration
Refer to Figure 16 and perform the following steps:
Step 1. Remove 2 screws at the bottom of the back cover and lift the cover
off the library.
Step 2. If a SCSI jumper cable is installed across connectors 2 and 3 on the
library back panel, remove it at this time.
Note: With the SCSI jumper cable removed, the library is configured
as two SCSI buses. The library and drive 1 are on the first bus
(ports 1 and 2) and drive 2 is on the second bus (ports 3 and
4).
Step 3. Install a terminator on connector 2 and connector 4.
Step 4. Align the external SCSI cable for system unit 1 with connector 1 on
the library back panel.
Step 5. Push in to seat the cable and tighten the thumbscrews (finger tight).
Step 6. Connect the other end of the SCSI cable to system unit 1.
Step 7. Align the external SCSI cable for system unit 2 with connector 3 on
the library back panel.
Step 8. Push in to seat the cable and tighten the thumbscrews (finger tight).
Step 9. Connect the other end of the SCSI cable to system unit 2.
Step 10. Go to “Step 12. Connecting the Power Cables” on page 20.
The advantages of this configuration include:
One 8mm Tape Library with two drives can be shared with two host systems.
Two jobs can be run simultaneously from two host systems.
Chapter 2. 8mm Tape Library Installation
19