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Can a NetApp LUN used by VMware ESXi be safely reduced in size through the GUI after expansion if a rollback is needed?

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Category:
ontap-9
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san
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Applies to

ONTAP 9
VMware ESXi

Answer

  • Reducing the size of a LUN on NetApp storage that is actively used by VMware ESXi (VMFS datastore) is not supported and presents significant risks.
  • Shrinking a LUN on the storage system (including using the -force option) without coordinated action on the host can result in:
    • Data loss
    • File system corruption
    • Errors such as File protectedlist closed with dirty buffers
    • Inability to boot or access the datastore
  • Consult with VMware support for guidance on supported recovery or rollback options.

Additional Information

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