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VMware vSphere 5.5 Cookbook by Abhilash G B

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Unmounting a VMFS datastore

Unmounting a datastore is a way of telling the ESXi host that the LUN will no longer be available for any I/O operation, until it is re-mounted. It is recommended to unmount a VMFS datastore before the LUN backing it is unpresented from an ESXi host.

Note

It is advised that you take care of the following before you proceed with the unmount operation:

  • All the VMs should be migrated off to a different datastore
  • The datastore should be removed from a datastore cluster
  • The datastore should remain unmanaged by Storage DRS (SDRS)
  • Storage I/O Control (SIOC) should be disabled for the datastore
  • Should not be in use as a vSphere HA heartbeat datastore

How to do it...

A VMFS volume can be unmounted from the vSphere Web Client GUI or using ...

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