Enhanced read margining using dither enhanced write marginalization for mass data storage applications
AssigneeQuantum Corporation
InventorsDan Gunderson, Doug Gunther
Life of this patent
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Abstract
A recording target error rate is selected for one or more of data storage devices, and for each data storage device, a dither value is determined for each read/write head in the data storage device, wherein for each head, using a dither value for writing data, essentially provides the selected recording target error for all the heads.
Claims34
A method of improving data playback error performance in data storage devices for storing data on removable data recording media, each data storage device having multiple read/write heads for recording data to the media during a write process and for playing back data from the media during a read process, comprising the steps of:
- (a) selecting a target error rate for recording data during the write process, for one or more of the data storage devices;
- and
- (b) for each data storage device, determining a dither value for each head in the data storage device, wherein for each head, using the corresponding dither value for the write process essentially provides said selected target error for all the heads.
A method of improving data playback error performance in data storage devices for storing data on removable data recording media, each data storage device having multiple read/write heads for recording data to the media during a write process and for playing back data from the media during a read process, comprising the steps of:
- (a) selecting a target error rate for recording data during the write process, for one or more of the data storage devices;
- and
- (b) for each data storage device, determining the amount by which to artificially degrade the read signal during the write process for each head in the data storage device to essentially provide said selected target error rate for all the heads.
A data storage device for storing data on removable data recording media, comprising:
- multiple read/write heads for recording data to the media during a write process and playing back data from the media during a read process;
- and
- a controller for controlling recording/playback operations with the heads, wherein the controller is configured to artificially degrade the read-back signal for each head during a write process to essentially provide a selected recording target error rate for all the heads.
Dependencies are inferred from the claim text.