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

SETCACHE||||||||||||||||||||||||||||||||||||||||||||||||3. COPY and PACE can be used in conjunction with this parameter.REESTABLISHDUPLEX(devid)reestablishes a duplex pair from the primary volume in a suspended duplexpair and the user-specified alternate device. DASD fast write status andcaching status are maintained. Abbreviation: REESTNotes:1. This parameter is not supported for the ESS.2. With this parameter, the JCL JOB statement should include ’TIME=1440’.3. COPY and PACE can be used in conjunction with this parameter.RESETTOSIMPLEXterminates a duplex pair. When the volumes are changed from a duplex pair tosimplex volumes, the old primary volume retains the DASD fast write and thedevice caching status of the duplex pair. For the old secondary volume, DASDfast write becomes inactive and device caching becomes active (reverts todefault status). Abbreviation: RESETSIM or RESIMNotes:1. This parameter is not supported for the ESS.2. RESETTOSIMPLEX can be issued to an offline device by using theUNITNUMBER parameter.COPY|NOCOPYspecifies whether or not the Storage Control is to copy the primary volumeonto the secondary volume when establishing a duplex pair (used only withthe SETSECONDARY parameter).COPYspecifies that the Storage Control is to copy the primary volume onto thesecondary when establishing a duplex pair (SETSECONDARY). (Copy canbe used with the RESETTODUPLEX and the REESTABLISHDUPLEXparameters.)Note: Specify the COPY parameter, except for pairs of primary andsecondary volumes that have just been initialized by ICKDSF usingthe same initialization parameters.NOCOPYspecifies that the primary and secondary volumes are identical and theStorage Control does not need to copy the primary volume onto thesecondary to establish the duplex pair (used only with SETSECONDARY;cannot be used with REESTABLISHDUPLEX or RESETTODUPLEX).Notes:1. The subsystem keeps an indication that the duplex pair was establishedusing an internal copy. If an error results because the two volumes arenot identical, this indicator is checked. The message given as a result ofthe out-of-synchronization condition indicates if an internal copy wasdone or that the out-of-synchronization condition is caused by aprobable user error.2. Specify only the NOCOPY parameter when both the primary andsecondary volumes have been initialized with ICKDSF, using the sameinitialization parameters, and contain no application data.3. Just as the parameter name suggests, nothing is copied from theprimary to the secondary.332 z/OS V1R6.0 DFSMS Access Method Services for Catalogs