Patent ID: 6889302
Filing Date: 2005-05-03
Classification: G06F

Abstract:
1. A method for maintaining information in one or more virtual volume aggregates, comprising the steps of: maintaining (N) virtual volumes in a first information storage medium comprising a direct access storage device file buffers; N≧1 forming one or more virtual volume aagregates, wherein each of said plurality of virtual volumes is assigned to one of said one or more virtual volume aggregates; providing a plurality (M) of second information storage media; identifying the least recently used virtual volume; and writing the virtual volume aggregate comprising said least recently used virtual volume to one or more second information storage media; generating (M) identifiers, wherein (M) is greater than 1; assigning an identifier (j) to one or more of said (N) virtual volumes, wherein (j) is greater than or equal to 1 and less than or equal to (M); assigning one of said (M) identifiers to each of said plurality of second information storage media; and writing one or more least recently used virtual volumes assigned the identifier (j) to one or more second information storage media assigned the identifier (j).