Patent ID: 8650615

Claim:
A method comprising: providing a storage virtualization system that communicates with a first network attached storage (“NAS”) system and a second NAS system on a network, wherein the first NAS system and the second NAS system have different domain names, and wherein the storage virtualization system stores a first user access code for accessing the first NAS system; storing on the storage virtualization system a second user access code for accessing the second NAS system; receiving a request to store a file having permission on the first NAS system using the first user access code; determining that storage of the file on the first NAS system is permitted using the first user access code; associating by the storage virtualization system the second user access code with the first user access code, based on the storage of the file on the first NAS system being permitted using the first user access code; and providing, in response to the request, storage of the file by the storage virtualization system to the second NAS system using the second user access code and not storing the file having permissions on the first NAS system.