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z/OS V1R6.0 DFSMS Access Method Services for Catalogs

z/OS V1R6.0 DFSMS Access Method Services for Catalogs

z/OS V1R6.0 DFSMS Access Method Services for Catalogs

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SETCACHE||||||||||||||||need not be a cause <strong>for</strong> concern. Circumstances exist, however, when the userneeds to be aware that dual copy address mapping may have changed:vvvvWhen device maintenance is requiredWhen devices are being removed or repositionedWhen subsystem re-initialization is requiredWhen it is necessary to vary a device offline <strong>for</strong> reconfiguration or maintenance,use the CCA to determine the system address.You can see the current map of system and device addresses by issuing theDEVSERV command or by running IDCAMS LISTDATA DSTATUS to any deviceor volume in the subsystem. Along with EREP (<strong>for</strong> 3380s) and SIM messages (<strong>for</strong>3390s), this in<strong>for</strong>mation may be useful to the service representative <strong>for</strong> identifyinga failing device.Note: Because of the asynchronous nature of IDCAMS operations, it is possiblethat during certain operations, the results from a DEVSERV command coulddiffer from the results of an IDCAMS report. If the two operations starttogether, the DEVSERV results are more current.338 z/<strong>OS</strong> <strong>V1R6.0</strong> <strong>DFSMS</strong> <strong>Access</strong> <strong>Method</strong> <strong>Services</strong> <strong>for</strong> <strong>Catalogs</strong>

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