StorageTek Host Software Component 6 用户手册

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.