Storage system

Details Storage system Storage system

2011-03-08

2011-03-08

Farrokh, Hashem (Department: 2187)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S114000

Reexamination Certificate

active

07904683

ABSTRACT:
Provided is a storage system enabling the addition of a storage apparatus without going offline. When a first storage apparatus receives from a host system a command for writing first data in any one of the primary volumes in a primary volume group, it writes the first data in the relevant primary volume and sends to a second storage apparatus a first command for writing the first data in a secondary volume specified using first mapping information. When the second storage apparatus receives from the host system a command for writing second data in any one of the secondary volume groups in a secondary volume group, it writes the second data in the relevant secondary volume and sends to the first storage apparatus a second command for writing the second data in a primary volume specified using second mapping information.

REFERENCES:
patent: 7392425 (2008-06-01), Schoenthal et al.
patent: 7421554 (2008-09-01), Colgrove et al.
patent: 2004/0260873 (2004-12-01), Watanabe
patent: 2005/0257014 (2005-11-01), Maki et al.
patent: 2006/0092828 (2006-05-01), Aoki et al.
patent: 2007/0233980 (2007-10-01), Cox et al.
patent: 2006-154880 (2006-06-01), None

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