IBM iSeries Series Hardware Problem Analysis And Isolation page 147

v Word 8 contains the number of missing disk units.
Are the problem disk units 432x, 660x, or 671x Disk Units?
v Yes: Continue with the next step.
v No: Attempt to get all devices attached to the IOP to Ready status by performing the following:
a. The IOP address (IOP Direct Select Address) to use is Word 4.
b. Verify the following, and correct if necessary:
– Ensure all cable connections are made correctly and are tight.
– Ensure the configuration within the device is correct.
– Ensure all storage devices are powered on and ready.
c. Continue with the next step.
3. Perform the following:
Select System Service Tools (SST) —> Work with disk units —> Display disk configuration —>
Display disk configuration status.
Are any disk units missing-indicated with an asterisk (*)- from the IASP configuration?
v Yes: Continue with the next step.
v No: This ends the procedure.
4. Use the Service Action Log to determine if there are any entries other than B6xx 5094 for the missing
disk units or the IOA or IOP that is controlling them. See "Use the service action log" on page 7.
Are there any entries in the Service Action Log other than B6xx 5094 for the missing disk units or the
IOA or IOP that is controlling them?
v No: Continue with the next step.
v Yes: Use the information in the Service Action Log to solve the problem. See "Use the service
action log" on page 7.
This ends the procedure.
5. Did you enter this procedure because there was a B6xx 5094 cause code of 0030?
v No: Continue with the next step.
v Yes: Work with the customer to recover the unknown configuration source disk unit.
Use a workstation with iSeries Navigator installed to select the disk pool with the problem, and then
select Recover unknown configuration source for this disk pool.
This ends the procedure.
6. Use Hardware Service Manager to display logical resources connected to the IOP. See Hardware
Service Manager in the iSeries Service Functions
7. Is every device attached to the IOP failing?
v Yes: Is there more than one storage IOA attached to the IOP?
– Yes: Exchange the IOP. Use the IOP direct select address from step 2 (See page 134) to find
the location. See Locations and addresses.
This ends the procedure.
– No: Go to step 9 (See page 136) of this procedure.
v No: Are all of the disk units that are attached to one IOA missing?
– No: Continue with the next step.
– Yes: Exchange the IOA. Use the IOP direct select address and the first character of the unit
address from step 2 (See page 134) to find the location. See Locations and addresses.
This ends the procedure.
8. Go to the service information for the specific disk unit that is listed below and perform the action
indicated. Then return here and answer the following question.
v 2105 Disk Units: Use SRC 3002 in (2105) Disk Unit Reference Codes and exchange the FRUs
shown one at a time.
information.
Analyze hardware problems
135