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Methods and Apparatus for Implementing Virtualization of Storage within a Storage Area Network

  • US 20080320134A1
  • Filed: 08/27/2008
  • Published: 12/25/2008
  • Est. Priority Date: 01/23/2002
  • Status: Active Grant
First Claim
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1. A method of implementing storage virtualization on a network device of a storage area network, the method comprising:

  • (a) receiving a frame or packet at a port of the network device;

    (b) determining that the frame or packet pertains to access of a virtual storage location of a virtual storage unit representing one or more physical storage locations on one or more physical storage units of the storage area network, wherein the virtual storage unit comprises a VLUN or other virtual representation of storage on the storage area network;

    (c) obtaining a virtual-physical mapping between the one or more physical storage locations and the virtual storage location;

    (d) sending a new or modified frame or packet to an initiator or a target specified by the virtual-physical mapping; and

    (e) requesting a lock of the one or more physical storage locations by said port of the network device prior to submitting the frame or packet to the one or more physical storage locations.

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