This parameter specifies additional attributes (extensions) for the tape storage groups. If you use tape duplexing, you can specify a volume serial range for the duplex tapes here. If you use tape duplexing, (indicated by the unit2-name in the STORGRP parameter), and the STORGRX parameter is specified without any values for dtvser1 and dtvser2, a scratch pool is used for the duplex volumes.
If the database is versioned up from a release prior to 1.7, the initial values for dtvser1 and dtvser2 are the same as for tvser1 and tvser2 (the primary range).
Syntax:
STORGRX0=dtvser1,dtvser2/mxblks
where:
A range of tape volume serial numbers used for the duplex backup archival generations.
The default is any scratch tape.
Volume serial numbers must:
Whenever a new tape is required to back up a generation, the next tape in the range is used. When the end of the range is reached, the first tape in the range is used.
The maximum number of storage blocks to which to write the primary and duplex volumes (the primary and duplex volumes are mirror images).
The minimum value is 10. The maximum value is 99,999,999.
The default of 0 means to write to end-of-volume.
Two different tape storage groups can specify the exact same range of tapes, or completely distinct ranges, but no partial overlap is allowed between groups.
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