Electrical computers and digital processing systems: memory – Storage accessing and control – Specific memory composition
Reexamination Certificate
2007-01-02
2007-01-02
Bragdon, Reginald (Department: 2189)
Electrical computers and digital processing systems: memory
Storage accessing and control
Specific memory composition
C711S158000, C711S163000
Reexamination Certificate
active
10788218
ABSTRACT:
A storage system prevents a time out error of the host I/O caused by a stagnation of command processing in the storage system for accessing a disk device according to the host I/O request and internal I/O request. In DTC, counters for managing the requests in-process for host I/Os (host read) and internal I/Os (pre-fetch, write back) individually are provided, and the number of processing requests to be issued to a virtual disk (RLU) is limited individually. By assigning priority to the host I/Os, the load balance of the host I/Os and internal I/Os can be controlled. For rebuild/copy back, a dedicated load control mechanism is disposed where the load adjustment between ordinary I/Os and rebuild/copy back is performed.
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Microsoft Computer Dictionary, 5thedition, © 2002, Microsoft Press, p. 472.
Daikokuya Hidejirou
Ikeuchi Kazuhiko
Ito Mikio
Kobayashi Akihito
Nagashima Katsuhiko
Bragdon Reginald
Flournoy Horace L.
Fujitsu Limited
Greer Burns & Crain Ltd.
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