Electrical computers and digital processing systems: memory – Storage accessing and control – Specific memory composition
Patent
1996-11-08
1998-09-22
Robertson, David L.
Electrical computers and digital processing systems: memory
Storage accessing and control
Specific memory composition
G06F 1200
Patent
active
058130241
ABSTRACT:
A disk control method for transferring large quantities of data to a data storage apparatus comprising a plurality of disk units without the use of a large buffer memory. Each of the disk units has at least one of a read cache and a write cache function. The data storage apparatus also includes an interface which, connected independently to each of the disk units, executes a protocol ranging from the issuance of a command to any one of the disk units up to the reception of status resulting from execution of the command as well as the reception of a message indicating the end of the command execution. In operation, the protocol of one disk unit is completed first, followed by issuance of a command for the next protocol. Thereafter, the protocol of another disk unit is completed, followed by issuance of a Transfer command. The method allows data transfer to be started immediately between the cache memory and the disk units with no rotational delays involved.
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Fuji 'Xerox Co., Ltd.
Robertson David L.
Tran Denise
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