Dynamic magnetic information storage or retrieval – General processing of a digital signal – Data verification
Reexamination Certificate
2004-12-28
2009-08-04
Feild, Joseph H (Department: 2627)
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Data verification
C714S758000, C714S763000, C714S776000, C714S807000
Reexamination Certificate
active
07570447
ABSTRACT:
There are provided a cache region that stores write data from a host device, storage media, a data storage region for the storage media, and a comparison unit. A first comparison object is generated for N items of write data on the cache region and the N items of write data are transferred to the data storage region. Write data is read from a designated address of the data storage region and this write data is written to the storage media. When N items of write data have been read, a second comparison object is generated in respect of the write data. The comparison unit compares the first comparison object and the second comparison object, and if the result of the comparison is a mismatch, the N items of write data on the cache region are again transferred to the data storage region.
REFERENCES:
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patent: 7131050 (2006-10-01), Holt
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Inoue Mitsuru
Koga Tsutomu
Anotnelli, Terry, Stout & Kraus, LLP.
Feild Joseph H
Goma Tawfik
Hitachi , Ltd.
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