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SWAPPING PPRC SECONDARIES FROM A SUBCHANNEL SET OTHER THAN ZERO TO SUBCHANNEL SET ZERO USING CONTROL BLOCK FIELD MANIPULATION
SWAPPING PPRC SECONDARIES FROM A SUBCHANNEL SET OTHER THAN ZERO TO SUBCHANNEL SET ZERO USING CONTROL BLOCK FIELD MANIPULATION
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机译：使用控制块场操作将PPRC次要从零位以外的子通道切换到零位子集
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摘要
A method for swapping peer-to-peer remote copy (PPRC) secondary device definitions from a subchannel set other than zero to subchannel set zero by the utilization of control block-field manipulation includes identifying a PPRC primary and secondary device pair, wherein a PPRC primary device definition resides at subchannel set zero and the PPRC secondary device definition resides at a subchannel set other than subchannel set zero; within operating system definitions of the PPRC pair, exchanging physical information associated with the PPRC primary and secondary devices, including pathing, node descriptor, device number, and a field cross referencing device numbers of the PPRC pair; and within channel subsystem definitions of the PPRC primary and secondary devices, via a SwapSubchannel instruction, exchanging physical information, including path and control unit information while retaining a subchannel identifier, a subchannel set identifier, and a subchannel interruption parameter pointing to the operating system definition of the device.
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