Patent ID: 6643667
Filing Date: 2003-11-04
Classification: G06F,Y10S

Abstract:
A method for creating a copy of data in a system comprising a plurality of storage devices, a control unit operable to control said storage devices, and a memory operable to temporarily store data read from said storage devices within said control unit, said storage devices addressable as at least one of a plurality of logical volumes, including a first logical volume and a second logical volume, said method comprising:specifying a relationship between at least two of said logical volumes, said relationship defined between said first logical volume and said second logical volume; creating a copy of data in said specified first logical volume into said second logical volume; said creating a copy further comprising: copying data from said first logical volume to a first location in said memory; copying said data from said first location in said memory to a second location in said memory; copying said data from said second location in said memory to said second logical volume; wherein said copying said data from said first location in said memory to a second location in said memory is performed by said control unit.