Electrical computers and digital processing systems: memory – Storage accessing and control – Specific memory composition
Reexamination Certificate
2007-08-14
2007-08-14
Portka, Gary (Department: 2188)
Electrical computers and digital processing systems: memory
Storage accessing and control
Specific memory composition
C711S162000, C703S021000
Reexamination Certificate
active
10968017
ABSTRACT:
A disk array device enabling an appropriate estimation of a physical disk capacity necessary prior to introducing a snapshot function. If a valid flag of the snapshot simulation function of a specified logical volume is on at receiving a data updating request from the host100, snapshot simulation function control means21inquiries with update range determination means10and receives notice of bits on a bitmap corresponding to a range of update data, sets corresponding bits on a bitmap of the specified logical volume of bitmap information storage means12by means of bitmap information updating means11, and executes data updating processing. Upon receiving an instruction of reporting a simulation result, snapshot simulation result reporting means22reports a physical disk capacity of the snapshot calculated by the snapshot simulation function.
REFERENCES:
patent: 6131148 (2000-10-01), West et al.
patent: 7031975 (2006-04-01), Kanie
patent: 2005/0038836 (2005-02-01), Wang
patent: 2001-216185 (2001-08-01), None
patent: 2002-278819 (2002-09-01), None
patent: 2002-373093 (2002-12-01), None
Ahmed Hamdy
NEC Corporation
Portka Gary
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