Method and apparatus for merging contiguous like commands

Details Method and apparatus for merging contiguous like commands Method and apparatus for merging contiguous like commands

2005-08-16

2005-08-16

Vital, Pierre M. (Department: 2188)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S112000, C710S032000, C710S039000

Reexamination Certificate

active

06931501

ABSTRACT:
Methods and a system for combining commands for data transfers between a drive and memory. One exemplary method includes receiving multiple read or write commands in a queue. Then, a first command of the multiple read or write commands is processed. Next, the multiple read or write commands are combined. The combination includes identifying like commands each being associated with a file stored on a drive and ascertaining which of the files associated with the like commands are contiguous. Then, a combined command is created, where the combined command consolidates the identified like commands being associated with contiguous files. Next, the combined command is issued to the drive.

REFERENCES:
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patent: 5802546 (1998-09-01), Chisholm et al.
patent: 5974544 (1999-10-01), Jeffries et al.
patent: 6138176 (2000-10-01), McDonald et al.
patent: 6145017 (2000-11-01), Ghaffari

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