Patent ID: 6810469
Filing Date: 2004-10-26
Classification: G06F,Y10S

Abstract:
A method for data transfer between storage systems having a source storage system connected to a host CPU and provided with one or more source storage device units for storing data of said host CPU and a source storage controller unit for controlling said source disk storage device units, and a target storage system provided with one or more target disk storage device units for storing said data received from said source storage system and a target storage controller unit for controlling said target storage device units, comprising the steps of:receiving a plurality of blocks of write data from said host CPU, each block having an associated first identifier allocated by said host CPU that indicates one of said source storage device units; unifying some of said blocks of write data to produce a unit of data for transmitting to said target storage system; allocating, to said unit of data a second identifier different from said first identifiers; sending, to said target storage system, said unit of data; receiving said unit of data in said target storage system; dividing said unit of data into said some of said blocks of data; and writing some of said blocks of data into said target storage device unit in accordance with said first identifiers for specifying a target, wherein said some of said blocks of write data are stored in one or more of said target disk storage device units based on their associated first identifiers.