StorageTek Host Software Component 6 User Manual

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

The journals contain a record of all transactions that update the control data set. 
There are two journals per host. It is recommended that they are placed on 
separate HDAs from the primary control data set DASD volume. 

specifies that there is to be two distinct copies of the control data set (primary 
and secondary) for recovery purposes. It is recommended that these data sets 
reside on separate HDAs and separate strings. A journal is not recorded. 

specifies that two distinct copies of the control data set (primary and secondary) 
and journals are specified for recovery purposes. Default is BOTH. 

specifies that primary, secondary, and standby control data sets are to be 
recorded for recovery purposes. No journals are recorded during HSC 
operation. 

specifies that all control data sets (primary, secondary, and standby) and 
journals are to be kept and available for recovery purposes. 

Use the following procedure to invoke the TCHNIQE utility and to set the appropriate 
recovery technique value: 

 1. ALLOCATE, based on existing CDS definitions, any new CDS copies that will be 

needed for the subsequent SET recovery technique. 

 2. Stop the HSCs on all hosts configured to use the CDS you are intending to update 

with SET recovery technique. 

 3. Run the BACKup utility. 

 4. Run the RESTore utility to restore all CDS copies required to support the current 

recovery technique. If the recovery technique update in the following step requires 
new CDS copies, then include them in this restore. 

 5. Run the SET utility with the appropriate recovery technique value. It is important to 

note that the SET utility for this recovery technique update must include /FILE 
statements for all CDS copies defined in either the old or the new recovery 
technique.

 6. Run the BACKup utility again. This backup provides you with the ability to restore 

the updated CDS. 

The following definitions apply to the JCL for SET utilities:

output messages from the utility program.