IBM iSeries 270 Service Manual page 553

3. A list of each auxiliary storage pool (ASP) will display, showing the disk units that are members of the
ASP. The Status column shows one of the following protection statuses for the ASP:
v Mirrored. These ASPs are configured for mirrored protection.
If the failing disk unit has mirrored protection, write down the status of the failing disk unit and its
mirrored pair. You will need this information later in one of the recovery procedures.
v Unprotected. An ASP with a status of Unprotected may contain disk units that are data parity
protected. Look in the Status column of the Display Disk Configuration Status display.
A unit with one of the following statuses has data parity protection only if all other units in the array
are operational:
– DPY/Active
– DPY/Failed
– DPY/HDW Failure
– DPY/Degraded
– DPY/Power Loss
– DPY/Not Ready
– DPY/Unknown
A unit with any other status (such as DPY/Rebuild or DPY/Unprotected) does not have data parity
protection.
Examples:
– Suppose one unit has a status of DPY/Failed while all other units have a status of
DPY/Unprotected. In this case, only the unit with the DPY/Failed status is protected. Servicing
the failed unit will not result in data loss. Removing any of the unprotected units could result in
data loss.
– If all units have a status of DPY/Active or DPY/Degraded, all units are protected. In this case,
exchanging any unit will not result in data loss.
Note: For more information about the meaning of a status for any unit, use the Help key as
indicated on the display.
4. Return to the procedure that sent you here.
This ends the procedure.
Exchange a disk unit with device parity protection: For use by authorized service providers.
1. Does the failing unit have data parity protection that allows service without possible data loss? (See
"Determine storage protection status" on page 540.)
v No: Customer data may be lost if serviced. Ask your next level of support for assistance.
This ends the procedure.
v Yes: Perform the following:
a. Record the disk unit location and resource name for later use. If you do not already have the
disk unit location information, use the location information in the Service Action Log. If the
location is not available, find the address (see "System reference codes (SRC) address formats"
on page 573). Use the address to find the location (see "Locations and addresses" on page
224).
b. Exchange the failing disk unit. See "Remove and replace procedures" on page 2. Select "Disk
unit (concurrent)" for the model or FC that you are working on.
c. If the concurrent procedure fails, go to step 4 (See page 542). Otherwise, continue with the next
step of this procedure.
2. Perform the following:
a. Select System Service Tools (SST). If you cannot get to SST, select Dedicated Service Tools
(DST). (See Dedicated Service Tools (DST) in the iSeries Service Functions
Analyze hardware problems
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