StorageTek How the Reconfiguration Utility Functions, 268VM/HSC 6.0 System Programmer’s Guide

Reconfiguration

•The old and new control data sets must be on volumes that are configured properly for real reserve/release to all hosts running HSC. (Refer to the IBM documentation for your environment.)

•If it is necessary to copy the control data set to another minidisk, use the BACKup and RESTore utilities to ensure proper reset of database flags.

How the Reconfiguration Utility Functions

During a reconfiguration, volume information is copied from the old CDS to the new CDS. If the same LSMid exists on both the old and new CDS, volume information is copied for all panels as long as the panel type did not change.

Notes:

1.LSM types must be the same, or no volumes in those LSMs are copied. 4410 and 9310 LSMs are considered to be the same LSM type.

2.An example of a ‘‘changed’’ panel type is if a drive panel replaces a cell panel. In this case, volume information on that panel is not copied.

When panels are frozen by the SET FREEZE utility, the resulting panel status in the new CDS is determined by these conditions:

•If the panel types match on the old and new CDS, the panel is frozen only if the panel on the old CDS is frozen.

•If the panel types do not match on the old and new CDS, the panel is frozen only if the panel on the new CDS is frozen.

The Reconfiguration utility is executed as an SCP job to transfer data from the old control data sets to the new control data sets.

Note: Reconfiguration executes under the Base service level only.

Before executing the Reconfiguration utility, it is highly recommended that you run the Volume Report utility, which specifies the ACS and/or ACS and LSM options.

The volume report detects any errant and/or selected volume plus cell-allocated, but empty, conditions. If any of these conditions exist, it is recommended that each condition be cleared before running the Reconfiguration utility. If not cleared, the condition is copied to the newly created control data set.

An exception exists for selected volumes that are copied and marked unselected in the new control data set. If duplicate VOLSERs exist, run the AUDIt utility before running the Reconfiguration utility.

The net result of executing the Reconfiguration utility (process) is the creation of new control data sets that must be used for HSC execution from this point.

Caution: Following a reconfiguration, all LSMs are in offline, manual mode and must be brought online. Commands that are dependent on the LSMs being online

268VM/HSC 6.0 System Programmer’s Guide

1st ed., 6/30/04 - 312579601