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FILE SERVER, FILE MANAGEMENT SYSTEM AND FILE MANAGEMENT METHOD

  • US 20120185646A1
  • Filed: 03/29/2012
  • Published: 07/19/2012
  • Est. Priority Date: 02/10/2009
  • Status: Active Grant
First Claim
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1. A storage system coupled to a client comprising:

  • a storage device having a plurality of disk drives each of which included in one of a plurality of RAID groups; and

    a controller configured to;

    control an access request to a plurality of files stored in the storage device;

    manage access time of each file;

    classify the plurality of files into a plurality of groups according to the access time of each file, each of the plurality of groups corresponding to the RAID groups;

    migrate a first file of the plurality of files so that files classified into a first group of the plurality of groups are stored in a first RAID group of the plurality of RAID groups; and

    spin down disk drives of the first RAID group in a predetermined time period of the first RAID group.

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