Siebel Database Upgrade Guide for DB2 UDB for z/OS > Creating the Siebel Staging Database > Preparing the z/OS Host Upgrade Environment and Creating the Staging Database >

Customizing the JCL UNIT Parameter Value

If appropriate for your environment, you can amend the UNIT=SYSDA parameter setting for all of the JCL generated for the Siebel upgrade before you run any jobs on the mainframe. The UNIT=SYSDA parameter can be amended in the following data sets:

• JOB0
• Any of the VSTG000n or VSTG00nn data sets

To amend the UNIT parameter setting

1. Navigate to the data set you want to amend. Make a backup copy of the data set.
2. Go to Edit mode on the data set.
3. To change the UNIT=SYSDA parameter, enter the following command on the command line:

   c sysda sgunit all

   where sgunit is the unit name you want to specify.

4. Press PF3 to save your changes.

   All the JCL generated by the data set will use the new value you specified.

If you want to revert to the default UNIT parameter settings, either restore the backup copy of the data set you made in Step 1 or transfer the staging data sets from the midtier again.

NOTE:  Any amendments you make to the UNIT parameter are not applied to data sets that are allocated using REXX routines.