Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Security kernel or utility
Reexamination Certificate
2007-07-10
2007-07-10
Moazzami, Nasser (Department: 2136)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Security kernel or utility
C713S153000, C707S793000, C711S147000, C711S150000, C711S154000
Reexamination Certificate
active
10261767
ABSTRACT:
A computing system and an exclusive access control method are provided for preventing degraded performance of a network caused by exclusive access control, and for permitting a computer to exclusively access a storage area irrespective of whether a storage has an exclusive access control function. In the computing system in which a plurality of computers and an external storage device storing shared data are connected through a relay, exclusive access control is executed by a device other than the storage. Specifically, the relay having a virtualizing function is instructed to execute exclusive access control. The relay has information indicating whether a storage area on the storage is an exclusive access area, so that the relay determines based on this information whether an access request received from a computer requests an access to an exclusive access area, and executes exclusive access control when it is an access request.
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Iwami Naoko
Kurokawa Hiroshi
Maki Nobuhiro
Yamada Hiroshi
Cervetti David Garcia
Hitachi , Ltd.
Mattingly ,Stanger ,Malur & Brundidge, P.C.
Moazzami Nasser
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