Expanding host drive on XenServer 5.5 with the SR on a LUN

 This is using a EVA4000 with XenServer 5.5 on blades with a Windows host that needs drive expansion.

Using the EVA management tools, need to expand them as close to 2TB as possible; our current EVA has a max capacity of 2TB LUNs.

1. Reboot each host in the pool by migrating vms to other servers (xe host-evacuate command is handy for that). Once done move the hosts back.

2. You should see the unallocated space on the SR now, allocate some to the file server virtual disk for data (once again trying to get close to 2TB for each) by changing its size in the properties (dynamically) 

3. In Windows go to the disk management and extend the volume you want to add the space to with the unallocated space.

Double check that the free space has now increased.