IBM SY44-5902-05 manual Reclaim IOP cache storage, Correct device parity protection mismatch

When a failed disk unit is repaired, use this option to rebuild the data. This option allows you to use the redundancy feature of device parity protection to rebuild data to a disk unit.

Attention: If there are several disk unit incompatibilities, make certain that the correct units are installed.

vReclaim IOP cache storage

When the IOP cache memory fails and needs to be replaced, this option allows you to remove and destroy the damaged data in the IOP cache.

Data can remain in the IOP cache when failures occur. Occasionally, a situation is so severe that the system perceives missing units. This prevents the system from IPLing. At other times, a reduction in the amount of usable cache storage occurs. This situation presents itself only as a warning during a manual mode IPL.

vCorrect device parity protection mismatch

This option allows you to accept the situation where configured disk units are expected to have device parity protection enabled but currently have device parity protection disabled. The configuration will no longer expect these disk units to be device parity protected.

vRecover unknown load source

This option allows recovery from an unknown load-source error where the mate of the load source in the mirrored pair is missing and the system does not currently recognize the load source.

Note: For load-source disks in remote load-source mirrored pairs, use the next option.

vRecover mirrored load source

This option allows you to recover from a local load-source failure. Remote load-source mirroring support must be started.

This option will find the disk configuration, find the remote load source, and copy the data from the remote load source to the new local load source. The system will be IPLed to DST once this operation completes successfully.

vRecover from start compression failure

Use this option in a recovery from a start compression operation that failed.

vMigrate load-source disk unit data

During migration, this option copies data from an original load-source disk unit onto the load-source disk unit of a new system.

Disk unit problem recovery procedures: This option allows you to select functions that assist in problem isolation and repair actions.

Note: Only the disk units that are available for a specific function are displayed.

vInitialize and format disk units

Use this option when the disk unit reference code indicates that reallocations have failed because no other space is available. All the ID fields on the disk unit are written again. Running this option erases all the data from the disk unit. This option is not available for the load-source disk unit.

vDisplay/change page data Use this option as follows:

22Service Functions V5R2