Variable written track widths for attribute-based storage
AssigneeSeagate Technology LLC
InventorsKaizhong Gao, Wenzhong Zhu, Tim Rausch, Edward Gage
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Abstract
A storage device controller is configured to select one of multiple written track widths for a storage location based on a write attribute of data to be recorded at the storage location. According to one implementation, the storage device controller is further configured to select a power level for a heat-assisted magnetic recording (HAMR) device based on the write attribute.
Claims18
One or more computer-readable storage media of a tangible article of manufacture encoding computer-executable instructions for executing on a computer system a computer process, the computer process comprising:
- selectively writing incoming data to a series of tracks consisting of a first series of alternating data tracks in a first radial zone of a storage medium responsive to a determination that the incoming data is cache data, the first series of alternating data tracks excluding a second series of alternating data tracks interlaced with the first series.
One or more computer-readable storage media of a tangible article of manufacture encoding computer-executable instructions for executing on a computer system a computer process, the computer process comprising:
- writing data to a first set of alternating data tracks on a storage medium with a first write head having a first write pole width responsive to a determination that at least one of a write frequency and write recency of the data is higher than a first predefined threshold;
- and
- writing data to a second set of alternating data tracks with a second write head having a second write pole width responsive to a determination that the at least one of write frequency and write recency is lower than a second predefined threshold, wherein the first set of alternating data tracks is interlaced with the second set of alternating data tracks, the first write pole width being smaller than the second write pole width.
An apparatus comprising:
- a storage device controller configured to:
- write incoming data to a first radial zone of a storage medium at a first written track width responsive to a determination that the incoming data is cache data;
- and
- write the incoming data to a second radial zone of the storage medium at one or more written track widths different from the first written track width responsive to a determination that the incoming data is non-cache data, the first written track width and the second written track width each defining an area on the storage medium that is initially magnetized as the area rotates through a magnetic field generated by a write element.
Dependencies are inferred from the claim text.