z/OS DFSMS Installation Exits
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Characteristics of the Open, Close and EOV Exits

z/OS DFSMS Installation Exits
SC23-6850-01

These exits run under the following conditions:
  • Supervisor state
  • Protection key five
  • TCB mode
  • 31-bit addressing mode

You must save and restore registers other than register 15.

Parent topic: Open, Close, End-of-Volume Tape Management Exits

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