z/OS DFSMSdfp Storage Administration
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Spreading allocations across multiple volumes

z/OS DFSMSdfp Storage Administration
SC23-6860-01

You might want to separate allocations and spread them across multiple volumes to reduce I/O contention and improve performance. After analyzing your data, you might find that certain data may not need some of the advanced storage features in your environment.

If you want to spread conventional allocations across volumes of different features, use one or all of the following suggested parameter settings in the assigned storage and data classes:
  • Storage Class Parameters
    • MSR = blank
    • BIAS = blank
    • ACCESSIBILITY = NOPREF
    • AVAILABILITY = NOPREF
    • GUARANTEED SPACE = N
  • Data Class Parameter
    • if EXT = blank

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