Product data

Step 13. (from step 12)
Have the using systems lost access both to the disk drive modules that
are in the SCSI address range 0 through 6, and to the disk drive
modules that are in the SCSI address range 8 through 14?
NO Go to step 14.
YES In the sequence shown, exchange the following FRUs for new
FRUs. Ensure that for each FRU exchange, you go to “MAP 2410:
2104 – Repair Verification” on page 65.
a. SCSI bus bridge card assembly (see “SCSI Bus Bridge Card
Assembly” on page 85)
b. Switch card assembly (see “Switch Card Assembly” on page 102)
c. Frame assembly (see “Frame Assembly” on page 106)
Step 14. (from step 13)
Do the disk drive modules that the using system cannot access have
SCSI addresses in the range 0 through 6?
NO Go to step 15.
YES Go to step 16.
Step 15. (from step 14)
Observe the SCSI Address switch on the switch card assembly (see “Switch
Card Assembly Switches” on page 9).
Is the SCSI Address switch set to On?
NO The switch is set for normal SCSI addresses.
a. Remove all devices, except for one, from slots 8 through 14.
b. Go to step 17 on page 63.
YES The switch is set for reversed SCSI addresses.
a. Remove all the disk drive modules, except for one, from slots 1
through 7.
b. Go to step 17 on page 63.
Step 16. (from step 14)
Observe the SCSI Address switch on the switch card assembly (see “Switch
Card Assembly Switches” on page 9).
Is the SCSI Address switch set to On?
NO The switch is set for normal SCSI addresses.
a. Remove all the disk drive modules, except for one, from slots 1
through 7.
b. Go to step 17 on page 63.
YES The switch is set for reversed SCSI addresses.
a. Remove all the disk drive modules, except for one, from slots 8
through 14.
b. Go to step 17 on page 63.
62 2104 Service Guide