This article provides steps to use Storage vMotion (SvMotion) to move virtual machines from one LUN to another LUN when you are using VirtualCenter 2.5 and ESX 3.5.
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To move virtual machines using SvMotion:
Install the VMware vSphere CLI. You can download the Remote CLI from the Drivers and Tools tab in support.broadcom.com. Click Automation Tools and SDKs and choose VMware vSphere CLI.
If you are using Remote CLI on Windows, open a command prompt and browse to the bin directory inside C:\Program Files\VMware\VMware VI Remote CLI\.