Electrical computers and digital processing systems: memory – Storage accessing and control – Specific memory composition
Reexamination Certificate
2006-02-07
2009-02-03
Sough, Hyung S (Department: 2188)
Electrical computers and digital processing systems: memory
Storage accessing and control
Specific memory composition
C711S114000, C714S005110
Reexamination Certificate
active
07487289
ABSTRACT:
In the present invention, for each set of blocks [#(0) to #(N−1)] storing update data, a history block [#(N)] storing an update state value, for example, a generation, time or check code, showing an update state is provided, constituting a set of management data as a check object. When writing update data on a disk, a new update state value is calculated for the same set of management data and stored in memory as update state confirmation value. The new update state value is also set as write data in the history block in the same set of management data, and the entire of the set of management data including update data and update state value are written onto a disk. The history block is read and disk write omissions are detected by comparing the update state value and the update state confirmation value stored in memory.
REFERENCES:
patent: 2002/0161972 (2002-10-01), Talagala et al.
patent: 2006/0075287 (2006-04-01), Vageline et al.
patent: 10-171608 (1998-06-01), None
U.S. Appl. No. 11/131,416, filed May 18, 2005, Shinya Mochizuki, et al., Fujitsu Limited.
Daikokuya Hidejiro
Ikeuchi Kazuhiko
Ito Mikio
Kobayashi Akihito
Mochizuki Shinya
Doan Duc T
Fujitsu Limited
Sough Hyung S
Staas & Halsey , LLP
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