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