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5.2.3.2 Connecting One 7131 Storage Tower to Two Systems
Use the following procedure to connect one 7131 Storage Tower to two systems (see Figure 5-12).
Note: This configuration requires an SE/DIFF card and two terminators. A SCSI Y-cable is also required for each system.
Figure 5-12. One 7131 Storage Tower Connected to Two Systems
1. DANGER
+--------------------------------------------------------------------+
¦ To prevent a possible electrical shock during an electrical storm, ¦
¦ do not connect or disconnect cables or station protectors for ¦
¦ communications lines, display stations, printers, or telephones. ¦
¦ (RSFTD003) ¦
+--------------------------------------------------------------------+
2. DANGER
+--------------------------------------------------------------------+
¦ To prevent a possible electrical shock from touching two surfaces ¦
¦ with different electrical grounds, use one hand, when possible, to ¦
¦ connect or disconnect signal cables. (RSFTD004) ¦
+--------------------------------------------------------------------+
3. If you link one 7131 Storage Tower in a two-system configuration, you can install a total of 6 devices.
4. Do not use device Address 6 (see Figure 5-2 in topic 5.2.1).
5. Set the second system adapter to address (I.D.) 6.
6. Connect two SCSI cables to the 7131 Storage Tower.
7. Connect the SCSI cables to one end of each SCSI Y-cable.
8. Secure the cables by tightening the screws on each SCSI cable connector.
9. Connect a SCSI terminator to the remaining end of each SCSI Y-cable.
10. Secure the terminators by tightening the screws on each terminator.
11. Connect the SCSI Y-cables to the system; refer to your system publications
12. Secure the cables by tightening the screws on each SCSI cable connector.
7131-105 User's Guide
Connecting One 7131 Storage Tower to Two Systems
¦ Copyright IBM Corp. 1995, 1996
5.2.3.2 - 1