I would suggest that any mid-size organization wanting an affordable and easy-to-use virtualization solution that allows them to fully access and manage their file data without limitation, should take a look at the AutoVirt solution. 
David Hill, Principal, Mesabi Group
More effective project planning
Quickly count files, determine size, and measure free space on your networked storage using AutoVirt’s assessment functionality.
Minimal downtime when you move data
AutoVirt facilitates share-by-share migration, which means that there is no need to take an entire device offline during migration. As soon as a share is migrated, clients automatically access that share in its new location. Share-by-share migration drastically reduces downtime, and automatic namespace referrals eliminate post-project shortcut remapping.
Consistent access to networked files
Quickly restore client access following data migration, and provide automated failover in the event that a storage device becomes unresponsive.
Perpetual support for existing UNC names
When you install AutoVirt, a namespace representing your physical file servers is automatically created. When you migrate data from these physical servers, the namespace ensure that pre-migration shortcuts and embedded links continue to work. End users can also browse the namespace, in the same way they browsed the original file server.
Faster data movement
Multi-threading architecture expedites all data movement activities.
Minimal network impact
AutoVirt throttles to respond to network conditions.