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Writing the AVR Nonstandard Label Processing Routine z/OS DFSMS Installation Exits SC23-6850-01 |
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Your routine must:
Your label processing routine receives control when the AVR routine cannot identify the first record on a magnetic tape volume as a standard label. The various error conditions that can occur during verification of the first record are explained under Volume Label Verification and Volume Label Editor Routines. The format of your nonstandard labels must provide for a 6-byte volume serial number field within the first 80 bytes of the label. Otherwise, the volume serial number is read into the 80-byte internal work area. This does not restrict the overall nonstandard label format from being more or less than 80 bytes in length. Your routine is called in 24-bit mode and must return in that mode. The name of your routine must be IEFXVNSL. |
Copyright IBM Corporation 1990, 2014
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