CA View backup tapes are written with proprietary control block format and cannot beread by any utility other than CA View's. The Tape Management System has no idea
what is actually contained within the tape. Tape Management System just knows the
tape by the data sets name by which it was cataloged the CA View started task.
The DCB attributes for the tape data sets are:RECFM=VBLRECL=32756BLKSIZE=32760
If you want to find the number of blocks on a CAView backup tape run a SARTCP
tape map. See the CA View Reference Guide Chapter on Database Utilities for more information on SARTCP