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KB tracking z/OS DFSMS OAM Planning, Installation, and Storage Administration Guide for Object Support SC23-6866-00 |
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For each tape volume, the following data-related columns are tracked
in the DB2 TAPEVOL table in kilobytes:
With larger capacity tapes, the possibility exists that these fields
may overflow their signed 4-byte value. To handle this situation,
five overflow-related columns (one for each of the columns above)
now exist in the DB2 TAPEVOL table to account for the number of overflow
KBs (in 2 GB increments). The overflow field will indicate the number
of times the main 4-byte field has overflowed. The following example
illustrates the logic that is implemented using the number of logical
bytes written:
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