10. Refer to Figure 18.

4 3 2 1

Off

On

 

Figure 18. Switch Card Assembly Internal Switches

 

 

 

 

 

 

 

 

 

11. Each disk drive module is identified to the using system by a SCSI address.

 

This address is related to the slot in which the disk drive module is installed.

 

The SCSI address switch 1 must always be set to the Off position.

 

 

 

 

Table 1 shows the SCSI addresses of the disk drive module slots.

 

 

 

 

 

Note: On the 2104 Model DU3, the physical numbers of the disk drive

 

 

 

module slots are always 1 through 14, from left to right.

 

 

 

 

 

Table 1. SCSI Addresses of Disk Drive Module Slots

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Disk drive

 

1

2

3

4

5

6

7

8

9

10

11

 

12

13

 

14

 

module slot

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SCSI

 

0

1

2

3

4

5

6

8

9

10

11

 

12

13

 

14

 

address

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Note: If the 2104 is configured for single SCSI bus mode with two SCSI

 

 

 

 

 

attachments (for example, SCSI adapters), SCSI addresses 5 and 6

 

 

 

cannot be used. The disk drive module slots with SCSI addresses 5 and

 

 

6 (disk drive module slots 6 and 7) must contain dummy disk drive

 

 

 

modules.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The SCSI enclosure services (SES) use address 15 if the Enable Enclosure

 

Services switch is set to On.

 

 

 

 

 

 

 

 

 

 

 

 

242104 Model DU3 Installation Guide

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IBM DU3 manual Scsi