Western Digital Technologies, Inc.

Hitachi Global Storage Technologies Netherlands B.v.

Hgst Netherlands, B.v.

Hung M Vu

Nyles Heise

James Eddy Donaldson

William Guthrie

Carl Dexter Bass, Jr

Sim Cherng Yi Sabrina

Systems, methods, and firmware for power control of data storage devices are provided herein. In one example, a data storage device is presented. The data storage device includes a transaction queue configured to enqueue storage operations received over a host interface of the data storage device for storage and retrieval of data on storage media. The data storage device includes a storage controller configured to process a power/current target to establish a dequeue process for storage operations in the transaction queue which operates the data storage device within the power/current target.

Enhanced queue management for power control of data storage device

A system and method for providing a command queue selection scheme by selecting commands by giving preference to commands based on the power consumption characteristics the command. In one embodiment the selection scheme involves calculating the value of the cost of energy saving associated with the access of a command by an evaluation function Costi=EAT+C&#xd7;F1 (seek distance, latency). C is a dynamically adjustable power control function that determines how much power decreases with the selection of a particular command and F1 is a functional calculation of the power consumption value associated with the particular command. In one embodiment commands with low power consumption will be accessed in preference to commands with shorter seek distance.

Method and system for reducing power consumption by command selection in a hard disk drive

Methods and apparatus of the present invention allow for interpolated Just in Time (iJIT) seek command control of hard drive actuators.

Interpolated just-in-time seek trajectories

Growing community of inventors

Fremont, CA, United States of America

Hung M Vu