DISKDRV

Complete the following steps:

1. Is the device location information available in the service action log?
   • No: Continue with the next step.
   • Yes: Replace the failing item, to replace the failing item, see the "Disk unit recovery procedure" in the service information for the system unit. This ends the procedure.
2. Find the direct select address and the device address. See the System reference code format description.
3. See Part locations and location codes and find the diagram of the system unit or expansion unit. Use the direct select address and the device address to find the location of the disk unit.
4. Is the SRC reported on the control panel?
   • No: Continue with the next step.
   • Yes: See the System reference code format description. The two rightmost characters of word 2 define the SRC format. Use the correct SRC format to locate the function that contains the characters tttt lmmm, where:
     • tttt = Type number
     • l = Level
     • mmm = Model

   Then go to step 6.

5. Remove the disk unit to determine the part number. Replace the disk unit. This ends the procedure.
6. Use the drive type to determine the part to replace. If you do not know the type, remove the disk unit to determine the part number. Replace the disk unit. This ends the procedure.