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File server for long term data archive

  • US 20060010177A1
  • Filed: 07/09/2004
  • Published: 01/12/2006
  • Est. Priority Date: 07/09/2004
  • Status: Active Grant
First Claim
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1. A Network Attached Storage (NAS) system for implementing long term data archiving comprising:

  • a NAS controller which processes file level input/output (I/O) requests and controls said NAS system; and

    a storage apparatus having a controller and a storage device, controlled by said controller, upon which a plurality of volumes for storing data is represented, wherein when at least a portion of data of a file stored on a volume included in said volumes is updated, the updated data is stored to an unused area of said volume and information is stored on said volume indicating that the updated data corresponding to original data stored in an original area is stored in said unused area so that subsequent accesses to the original of the updated data is directed to the updated data stored in said unused area, and wherein the original of the updated data is retained in said original area, thereby implementing long term data archiving of the original of the updated data.

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