Disk control method for use with a data storage apparatus having

Details Disk control method for use with a data storage apparatus having Disk control method for use with a data storage apparatus having

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.

REFERENCES:
patent: Re34025 (1992-08-01), Hester et al.
patent: 4949245 (1990-08-01), Martin et al.
patent: 5008819 (1991-04-01), Gorbatenko
patent: 5218695 (1993-06-01), Noveck et al.
patent: 5392445 (1995-02-01), Takamoto et al.

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