Dynamic response shaping for command aging

Details Dynamic response shaping for command aging Dynamic response shaping for command aging

2005-11-15

2005-11-15

Verbrugge, Kevin (Department: 2189)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711S168000, C710S006000

Reexamination Certificate

active

06965965

ABSTRACT:
The present invention provides a method, apparatus and article of manufacture for selecting commands to execute from a command queue in a data storage device. The present invention reduces maximum service times under random queued workloads by executing the oldest command in the queue at a constant and predetermined rate. This yields a minimal yet predictable performance penalty, while significantly reducing maximum service times.

REFERENCES:
patent: 4523206 (1985-06-01), Sasscer
patent: 6145052 (2000-11-01), Howe et al.
patent: 6301639 (2001-10-01), Cleavinger et al.
patent: 6895482 (2005-05-01), Blackmon et al.
patent: 2002/0178326 (2002-11-01), Ohta et al.
Co-pending Patent Application “Adaptive Event-Based Predictive Failure Analysis Measurements in a Hard Disk Drive”; U.S. Appl. No. 10/023,262; filed Dec. 18, 2001.

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