How to rescan DirectLUN recently added to a Windows VM running in RHEV ?

Solution Unverified - Updated -

Issue

  • Assigned a LUN to one of my Windows 2008 R2 guests.

  • Either Hyper-V or VMWare assignment of a LUN means that attaching a direct volume from SAN, and if need to increase the size of the LUN on the SAN that will be reflected right away on my Windows guest and with diskpart.

  • How Windows guest detects that new size of the LUN ?

Environment

  • Red Hat Enterprise Linux 6.4
  • Red Hat Enterprise Virtualization 3.1

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