IOPIP21

Use this procedure to determine the failing disk unit when, a disk unit is not compatible with other disk units in the disk array, or when a disk unit has failed. If the URC is 9025 or 9030, the disk array is running, but it might not be protected.

You were sent to this procedure from a unit reference code (URC) of 9025, 9030, or 9032.

If the system has logical partitions, perform this procedure from the logical partition that reported the problem. To determine if the system has logical partitions, go to Determining if the system has logical partitions before continuing with this procedure.
Is the device location information for this SRC available in the Service Action Log (see Using the Service Action Log for details)?
- Yes: Exchange the disk unit.
- No: Continue with the next step.
Access SST/DST by doing one of the following:
- If you can enter a command at the console, access system service tools (SST). See System Service Tools (SST).
- If you cannot enter a command at the console, perform an IPL to DST. See Performing an IPL to DST.
Perform the following steps:
1. Access the Product Activity Log and display the SRC that sent you here.
2. Press the F9 key for address information. This is the I/O card address.
  Note:
  
  There may be more than one entry with the same Log ID. Entries with the same Log ID may be accessed by pressing the Enter key from the "Display Detail Report for Resource" screen.
  
  Example: There may be a device specific SRC and/or an xxxx902F SRC entry in the Product Activity Log. The xxxx902F SRC will occur if there are more than 10 disk units in the array.
3. Continue with the next step.
Perform the following steps:
1. Return to the SST or DST main menu.
2. Select Work with disk units -> Display disk configuration -> Display disk configuration status.
3. On the Display disk configuration status display, look for the devices attached to the I/O card that is identified in step 4.
4. Find the device that has a status of "DPY/Unknown" or "DPY/Failed". This is the device that is causing the problem. Show the device address by selecting Display Disk Unit Details -> Display Detailed Address. Record the device address.
5. See Locating FRUs and find the diagram of the system unit, or the expansion unit and find the following:
  - The card slot that is identified by the I/O card direct select address
  - The disk unit location that is identified by the device address
Have you determined the location of the I/O card and disk unit that is causing the problem?
- Yes: Exchange the disk unit that is causing the problem. This ends the procedure.
- No: Ask your next level of support for assistance. This ends the procedure.