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ISTVMAP z/OS Communications Server: SNA Diagnosis Vol 1, Techniques and Procedures GC27-3667-00 |
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Use ISTVMAP to determine the starting and ending addresses and area size of the following major MVS™ storage areas in a dump:
When you cannot find an address in a dump, the starting and ending addresses of major MVS storage areas in the dump will help you determine whether and where that address is in the dump. Also use ISTVMAP when areas of storage needed to diagnose a VTAM® problem do not appear to be in the dump. Knowing which storage area a given address represents and what was dumped can be helpful in determining why a specific storage address is not in a dump. See ISTVDUMP to determine which storage areas were requested to be dumped when the dump was taken. The ISTVMAP command can also be issued from the panel interface. Operands
Additional informationThe storage in an MVS system is mapped by the CVT virtual storage address extension, the global data area (GDA), and the local data area (LDA). ISTVMAP uses these areas to produce a map of storage that is unique to the dump being processed. The map does not apply to any other dump. Some of the ranges in the ISTVMAP output will not be complete if the private region (RGN) of the address space being mapped is not accessible in the dump. If the ASID parameter is not specified, the ISTVMAP CLIST will use the current ASID (that is, the ASID specified on the IPCS SETDEF command). If that ASID cannot be determined, the ASID from the dump header will be used (the ASID that was current when the dump was taken). If that ASID cannot be determined, VTAM's ASID will be used. If the ASID of VTAM cannot be determined, ASID 0001 will be used. Sample outputISTVMAP:
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