z/OS DFSMSdfp Advanced Services
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How Many

z/OS DFSMSdfp Advanced Services
SC23-6861-01

One for every unused 140-byte record on the VTOC. The DS4DSREC field of the format-4 DSCB is a count of the number of format-0 DSCBs on the VTOC. This field is not maintained for an indexed VTOC.

Parent topic: Format-0 DSCB

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