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628 VM/HSC 6.0 System Programmer’s Guide
1st ed., 6/30/04 - 312579601
The original primary control data set continues to operate for ACS0 only. As the library
operates, any updates occurring to either control data set after the link was severed causes
the data sets to be unsynchronized. It is a difficult task to resynchronize the data for both
data sets.
Possible solutions to resynchronize the data sets include:
• Execute the AUDIt utility and reconcile the differences between the primary control
data set and the secondary data set. This solution is not recommended because of the
time required to perform a full audit operation.
• Execute the BACKup utility, specifying OPTion(Analyze), immediately followed by
the RESTore utility, specifying GENerate(YES). The BACKup utility performs error
and comparison checking of records for the data sets and enables you to reconcile the
differences. With this utility, you can ensure that the two data sets are properly
synchronized. Library operation can be resumed at a high confidence level.
• Prior to reestablishing the link:
1. Bring the HSC down.
2. Reestablish the link.
3. Run BACKup OPTion(Analyze) and RESTore GENerate(YES).
4. Bring the HSC up.
5. Use the discrepancy report produced by the backup to determine discrepancies
between copies of the CDS.
Refer to Chapter 4, “Utility Functions” on page 169 and the AUDIt, BACKup, and
RESTore utilities for detailed information.