Note: Do not IPL the system to get to DST.
Select the Work with disk units option on the Use Dedicated Service Tools (DST)
display.
2. Select the Display disk configuration option on the Work with Disk Units display.
3. Select the Display disk configuration status option on the Work with Disk
Configuration display.
A list of each auxiliary storage pool (ASP) displays, showing the disk units that
are members of the ASP. The Status column shows one of the following
protection statuses for the ASP:
Unprotected
Mirrored
v Disk units in an ASP with a protection status of Mirrored 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 An ASP that has 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. The status column shows one of the following protection
status:
– DPY/Active
– DPY/Failed
– DPY/HDW Failure
– DPY/Degraded
– DPY/Power Loss
– DPY/Not Ready
– DPY/Unknown
A unit with one of these statuses has data parity protection only if all other
units in the array are operational.
A unit with any other status does not have data parity protection. For
example, a unit that does not have data parity protection may have a status
of:
– DPY/Rebuild
– DPY/Unprotected
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.
For more information about the meaning of a status for any unit, use the
Help key as indicated on the display.
Return to the procedure that sent you here.
Data Recovery and General System Information
Chapter 6. Data Recovery Procedures and General System Information 895
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