Patent ID: 7934065
Filing Date: 2011-04-26
Classification: G06F,Y10S

Abstract:
1. A computer system storing data on multiple storage systems, said computer system comprising: a primary storage system that is coupled to a first computer that executes prescribed work processing and stores data used when the first computer is executing said work processing; a secondary storage system that is coupled to a second computer that executes said work processing in place of said first computer and stores data used when said second computer is executing said work processing; a primary intermediate storage system that is coupled to said primary storage system; a secondary intermediate storage system that is coupled to said secondary storage system and said primary intermediate storage system; wherein said computer system has a first remote copy status and a second remote copy status; wherein, in said first remote copy status, said first computer processes a first copy and a second copy, said first copy includes that said primary storage system copies the data stored therein to said primary intermediate storage system via synchronous copying for storage therein, said second copy includes that said primary intermediate storage system copies the copied data to said secondary storage system through said secondary intermediate storage system via asynchronous copying for storage therein; wherein, in said second remote copy status, said second computer processes a third copy and a fourth copy, said third copy includes that said secondary storage system copies the data stored therein to said secondary intermediate storage system via asynchronous copying for storage therein, said fourth copy includes that said secondary intermediate storage system copies the copied data to said primary storage system through said primary intermediate storage system via synchronous copying for storage therein, and wherein, in said second remote copy status, a status of said fourth copy is suspend after a status said third copy is duplex.