IBM iSeries Series Hardware Problem Analysis And Isolation page 153

v Characters 9-16 of the top 16 character line of function 13 (word 7) contain the IOP direct select
address.
v Characters 1-8 of the bottom 16 character line of function 13 (word 8) contains the disk unit type,
level and model number.
Are characters 1-4 of the bottom 16 character line of function 13 (4 leftmost characters of word 8)
equal to 9337?
v No: Find the table for the disk unit type (characters 1-4 of the bottom 16 character line of function
13 - 4 leftmost characters of word 8) in System Reference Codes, and use characters 13-16 of the
bottom 16 character line of function 12 (4 rightmost characters of word 5) as the unit reference
code.
This ends the procedure.
v Yes: Go to step 21 (See page 141).
19. Are characters 9-16 of the top 16 character line of function 12 (word 3) equal to 0002000D?
v Yes: Continue with the next step.
v No: Use the information in characters 9-16 of the bottom 16 character line of function 13 (word 9),
instead of the information in word 1 for the reference code, and go to System Reference Codes.
– Characters 1-8 of the top 16 character line of function 13 (word 6) may contain the disk unit
address.
– Characters 9-16 of the top 16 character line of function 13 (word 7) may contain the IOP direct
select address.
– Characters 1-8 of the bottom 16 character line of function 13 (word 8) may contain the disk unit
type, level and model number.
This ends the procedure.
20. Disk information available in this step is:
v Characters 1-8 of the top 16 character line of function 13 (word 6) contains the disk unit address.
v Characters 9-16 of the top 16 character line of function 13 (word 7) contain the IOP direct select
address.
v Characters 1-8 of the bottom 16 character line of function 13 (word 8) contains the disk unit type,
level and model number.
Are characters 1-4 of the bottom 16 character line of function 13 (4 leftmost characters of word 8)
equal to 9337?
v No: Find the table for the disk unit type (characters 1-4 of the bottom 16 character line of function
13 (4 leftmost characters of word 8) in System Reference Codes and use 3002 as the unit
reference code. Exchange the FRUs for URC 3002 one at a time.
This ends the procedure.
v Yes: Continue with the next step.
21. The disk unit that stopped communicating with the system is a 9337 Disk Unit.
22. Locate the IOP using the IOP address (see Locations and addresses).
Note: If the IOP is located in a 504x rack, see SY44-4934-00, FC 504x Problem Analysis and Repair
and Parts information.
Using the IOP type (identified by the label on the IOP), and the device address, find the location of
the device (see Locations and addresses).
Does the 9337 Disk Unit Data display contain the value 9337 xxxx?
Note: xxxx can be any hexadecimal value from 0000 to FFFF.
v No: Continue with the next step.
v Yes: Use the service information for the specific disk unit to analyze the status of the failing unit.
This ends the procedure.
23. Set the power switch on the failing 9337 disk unit to the Off position, then to the On position.
After 4 minutes, does the 9337 Data display contain the value *xxx?
Analyze hardware problems
141