Storage I/O Control Is Disabled For This Datastore

If you delete a LUN on your SAN before you delete the datastore in VMware ESXi, you get the following error message when you try to unmount the datastore:

Confirm Datastore Unmount

Storage I/O control is disabled for this datastore

Please do not perform any configuration operations that may result in I/O to the datastore while the unmount is in progress.

To fix this, do one of the following:

  • Reboot the ESXi hosts using the datastore (which disables Storage I/O Control, so the datastore can be unmounted)
  • SSH to each ESXi host that you want to unmount the datastore from and enter the following command:

    /etc/init.d/storageRM stop

    Next rescan the storage adapter on each ESXi host, then run the following command:

    /etc/init.d/storageRM start

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