Method and apparatus for command queue ordering with a sort time reduction algorithm
AssigneeHitachi Global Storage Technologies Netherlands B.V.
InventorsAdam Michael Espeseth, David Robison Hall
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AssigneeHitachi Global Storage Technologies Netherlands B.V.
InventorsAdam Michael Espeseth, David Robison Hall
Estimating the term…
A method and apparatus are provided for hard disk drive command queue ordering. A command received from a host is placed in a rotational order command list. A fraction of the rotational order command list is analyzed. Commands are analyzed with a maximum selection probability. A maximum analysis time before the currently executing command is completed is determined. The total analysis time cannot exceed the maximum analysis time. The fraction of the rotational order command list is analyzed in a first pass. A skip-sort interval is selected based upon the maximum analysis time and a current queue depth of the rotational order command list. In a second pass, the number of commands analyzed corresponds with the number of commands that can be analyzed in the remaining available processing time.
A method for hard disk drive command queue ordering comprising the steps of:
A computer program product for hard disk drive command queue ordering in a disk drive including a processor unit, said computer program product including a plurality of computer executable instructions stored on a computer readable medium, wherein said instructions, when executed by said processor unit, cause the processor unit to perform the steps of:
Apparatus for hard disk drive command queue ordering comprising:
Dependencies are inferred from the claim text.