Electrical computers and digital processing systems: memory – Storage accessing and control – Control technique
Reexamination Certificate
2008-08-15
2011-11-29
Choe, Yong (Department: 2185)
Electrical computers and digital processing systems: memory
Storage accessing and control
Control technique
C711S170000, C711SE12001, C711SE12103
Reexamination Certificate
active
08069322
ABSTRACT:
A method for data storage, including configuring a first logical volume on a first storage system and a second logical volume on a second storage system. The second logical volume is configured as a mirror of the first logical volume, so that the first and second logical volumes form a single logical mirrored volume. The method also includes receiving at the second storage system a command submitted by a host to write data to the logical mirrored volume, and transferring the command from the second storage system to the first storage system without writing the data to the second logical volume. On receipt of the command at the first storage system, the data is written to the first logical volume. Subsequent to writing the data to the first logical volume, the data is mirrored on the second logical volume.
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Choe Yong
Griffiths & Seaton PLLC
International Business Machines - Corporation
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