IBM SY44-5902-05 manual Replace disk unit, Assign missing units, Recover disk configuration

This option reads the data (recorded using the Save disk unit option) from the removable medium and writes the data on the disk unit. The data can be restored to a disk unit of the same type or to a different type of disk unit that has the same or larger storage capacity. When all data is restored to the disk unit, an ending display appears with status information. If the replaced disk is load source, the system will IPL to DST from the new disk. For the others, the system will not re-IPL.

For systems with multiple partitions, the partition configuration will have to be restored first.

vReplace disk unit

This option is part of the disk unit recovery procedure. It allows you to exchange a configured disk unit with a non-configured unit. Use the Delete ASP data option to clear the system ASP before replacing the disk unit only if the disk is not under mirror or device parity protection. You can make the protection active again after replacing the failed disk by following the Disk Unit Recovery Procedure.

vAssign missing units

This option reports any missing units (units that were part of the system during the last IPL that have been disconnected accidentally or configured differently). When you select to assign a unit, the system attempts to find one or more valid non-configured disk units. If no valid non-configured disk units are found, use the Replace disk unit function.

vRecover disk configuration

This option recovers the correct system configuration in cases where the load source was damaged and the device configuration table on the installation device was lost.

vDisk unit problem recovery procedures

For details on this option, see the main heading “Disk unit problem recovery procedures” on page 22.

vSuspend mirrored protection

Select this option when you want to stop mirrored protection for a unit in a mirrored auxiliary storage pool.

vResume mirrored protection

Select this option when you want to restart mirrored protection for a unit in a mirrored auxiliary storage pool.

vCopy disk unit data

This option allows you to copy all the data from a configured disk to a non-configured disk unit. This action can take the place of save disk unit data to tape and a restore disk unit data. After the operation is complete, the target disk unit (the one copied to) takes the place of the original disk unit in the system configuration. The original disk cannot be used in the system configuration without data loss.

vDelete disk unit data

This option allows you to delete all the data from a non-configured disk unit. Note: This option is only allowed for non-configured disk units.

vUpgrade load-source utility

This option allows you to migrate the disk unit configuration to a system with new hardware.

vRebuild disk unit data

Chapter 1. Dedicated Service Tools (DST) 21