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Why are there Active/Optimized and Active/Unoptimized paths on Windows Server LUNs?

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Category:
ontap-9
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san
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Applies to

  • ONTAP 9
  • FAS/AFF controllers
  • SAN
  • Asymmetric Logical Unit Access (ALUA)
  • Microsoft Windows Server
  • Microsoft Hyper-V

Answer

  • LUNs are hosted on the aggregate of a single node.
  • Paths to a LIF hosted on the LUN's node are direct.
  • Paths to a LIF on a different node in the cluster are indirect.
  • ALUA marks direct paths as optimized, and indirect paths as unoptimized.
  • Unoptimized paths are only used when no optimized paths are available.

Additional Information

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