Storage system, storage control device, and data relay...

Details Storage system, storage control device, and data relay... Storage system, storage control device, and data relay...

2006-11-14

2006-11-14

Peugh, Brian R. (Department: 2187)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C707S793000

Reexamination Certificate

active

07136975

ABSTRACT:
A plurality of virtual volumes with different control functions are associated with one real volume and remote copying is conducted. A relay system comprises a plurality of virtual volumes V12,V21mapped to the same real volume R1.A virtual volume V21for transmission control is mapped to a real volume R1,a real volume R2is mapped to the virtual volume V21,and the virtual volume V12for reception control is mapped to the real volume R2.If a command is received from a local system10,the virtual volume V12for reception control writes data into the virtual volume V21via the real volume R2(virtual entity). The virtual volume V21transmits the data to a copy destination volume V22and writes the data into the real volume R1.

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