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DASD Rotational Positioning Sensing z/OS DFSMSdfp Advanced Services SC23-6861-01 |
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On newer storage subsystems, such as IBM® D58000, the sector value has no effect. On other subsystems, your channel program can be more efficient for device and channel usage if it supplies sector numbers. Your program can read sector numbers with the read sector command or calculate them with the sector conversion routine. That routine is described in Obtaining the Sector Number of a Block on an RPS Device. |
Copyright IBM Corporation 1990, 2014
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