Remote copy system maintaining consistency

Details Remote copy system maintaining consistency Remote copy system maintaining consistency

2011-01-04

2011-01-04

Campos, Yaima (Department: 2185)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S161000, C707S640000, C707S674000, C707S675000, C707S676000, C707S677000, C707S682000, C707S683000, C707S684000, C707S685000, C707S686000, C714S005110, C714S006130

Reexamination Certificate

active

07865678

ABSTRACT:
A remote copy system for copying data between a plurality of storage systems, including: a plurality of first storage systems to and from which data is inputted and outputted, and a plurality of second storage systems that are connected to each of the first storage systems; each of the first storage systems including a first logical volume that stores the data that is inputted and outputted; each of the second storage systems including a second logical volume that stores a copy of the data stored in the first logical volume; the remote copy system comprising a pre-update data storage unit that stores pre-update data that is stored before data to be stored in the second logical volume is updated and time stamps of the data to be stored in the second logical volume.

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