Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability
Reexamination Certificate
2007-01-02
2007-01-02
Kim, Hong (Department: 2185)
Error detection/correction and fault detection/recovery
Data processing system error or fault handling
Reliability and availability
C714S758000, C711S112000
Reexamination Certificate
active
10675561
ABSTRACT:
A digital data storage system in the form of a mass storage subsystem in which information is stored on one or more disk storage units, with a storage element constituting a track on a disk storage device and each track storing a plurality of records. Each track in each disk storage device of the digital data storage system is associated with a descriptor. When the control device retrieves the contents of a record, it can process the contents to generate a check value and compare the generated check value with the check value for the record as stored in the descriptor associated with the track. If they compare appropriately, the control device can determine that the record that was retrieved was, in fact, the record that was to be retrieved. On the other hand, if they do not compare appropriately, the control device can determine that the record that was retrieved was not the proper record. If the contents of the record are updated, the control device can update the check value in the descriptor to reflect the update of the record.
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Advanced Micro Devices (AMD), AM 2960 Family Handbook, 1983, pp. 36-45.
Kopylovitz Haim
Vishlitzky Natan
EMC Corporation
Fish & Richardson P.C.
Kim Hong
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