Electrical computers and digital processing systems: memory – Storage accessing and control – Hierarchical memories
Patent
1996-06-25
1998-05-12
Beausoliel, Jr., Robert W.
Electrical computers and digital processing systems: memory
Storage accessing and control
Hierarchical memories
711114, G06F 1100
Patent
active
057519374
ABSTRACT:
A storage unit system includes a control apparatus having a unit for reading memory data from a plurality of storage units before increase into a memory of the control apparatus, a preparing unit for preparing parity data newly from the memory data read in the memory, a rearrangement unit for dispersing transfer data from a processor read in the memory and the newly prepared parity data to be written into a plurality of storage units after the increase to perform arrangement of data, a memory unit for storing a write position on the way of the rearrangement of data, a comparison unit for comparing an access position for an access request from the processor with the write position, and a determining unit for determining a data dispersed pattern used in a data access from the processor on the basis of a comparison result of the comparison means, whereby the storage unit can be increased individually with a unit of one storage unit and dynamically without stop of the system.
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Arai Kouji
Satoh Takao
Yamamoto Akira
Beausoliel, Jr. Robert W.
Hitachi , Ltd.
Palys Joseph E.
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