Electrical computers and digital processing systems: memory – Storage accessing and control – Specific memory composition
Reexamination Certificate
2008-02-06
2011-10-11
Patel, Kaushikkumar (Department: 2186)
Electrical computers and digital processing systems: memory
Storage accessing and control
Specific memory composition
C711S162000, C714S758000
Reexamination Certificate
active
08037245
ABSTRACT:
One code (a compressed redundant code) is created based on a plurality of first redundant codes, each created on the basis of a plurality of data units, and this compressed redundant code is written to a nonvolatile storage area. This compressed redundant code is used to restore either a data element constituting a multiple-failure data, or a first redundant code corresponding to the multiple-failure data, which is stored in an unreadable sub-storage area of a partially failed storage device, and to restore the data element constituting the multiple-failure data which is stored in a sub-storage area of a completely failed storage device, based on the restored either data element or first redundant code, and either another data element constituting the multiple-failure data or the first redundant code corresponding to the multiple-failure data.
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Ito Shintaro
Kawamura Shunji
Kitamura Manabu
Matsunami Naoto
Ogawa Junji
Brundidge & Stanger, P.C.
Hitachi , Ltd.
Patel Kaushikkumar
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