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US 10,832,726 B1Granted
Remapping tracks for management of adjacent track interference
AssigneeSeagate Technology LLC
InventorsChoon Wei Ng, Kok Choon See, Jian Qiang, LiBin Cai
Life of this patent
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Abstract
A method includes monitoring operations performed on tracks in a main storage area of a disc, and identifying a track of the tracks in the main storage area susceptible to adjacent track interference (ATI). When a track is identified, the identified track or an adjacent track which contributes to ATI of the identified track is remapped to an ATI safe zone of the disc having a tracks per inch (TPI) density lower than a TPI density of the main storage area.
Claims21
A method, comprising:
- monitoring operations performed on tracks in a main storage area of a disc;
- identifying a track of the tracks in the main storage area susceptible to adjacent track interference (ATI);
- remapping the identified track or an adjacent track which contributes to ATI of the identified track to an ATI safe zone of the disc having a tracks per inch (TPI) density lower than a TPI density of the main storage area;
- and
- when the identified track is remapped to the ATI safe zone, remapping the identified track back to its original location in the main storage area when a write frequency to the adjacent track in the main storage area falls below a threshold write frequency.
2 more elements
A method, comprising:
- monitoring tracks in a hard disc drive (HDD) for scan frequency, the scan frequency being a frequency at which the tracks are scanned as part of a data loss avoidance process;
- designating a track in a main storage area of the HDD as an adjacent track interference (ATI) hot track when its scan frequency exceeds a predetermined scan frequency threshold;
- and
- remapping the designated ATI hot track to an ATI safe zone having tracks with lower susceptibility to ATI.
1 more element
An apparatus, comprising:
- a data storage medium comprising a plurality of tracks, including tracks in a main storage area having a first tracks per inch density, and tracks in an ATI safe zone having data-free tracks interspersed between write-permitted tracks;
- and
- a controller communicatively coupled to the data storage medium, the controller configured to:
- monitor operations performed on the tracks in the main storage area;
- identify a track of the tracks in the main storage area susceptible to adjacent track interference (ATI);
- and
- remap the identified track or an adjacent track which contributes to ATI of the identified track to one of the write-permitted tracks in the ATI safe zone.
4 more elements
A method, comprising:
- monitoring operations performed on tracks in a main storage area of a disc;
- identifying a track of the tracks in the main storage area susceptible to adjacent track interference (ATI);
- remapping the identified track or an adjacent track which contributes to ATI of the identified track to an ATI safe zone of the disc having a tracks per inch (TPI) density lower than a TPI density of the main storage area;
- and
- when the adjacent track is remapped to the ATI safe zone, remapping the adjacent track back to its original location in the main storage area when a write frequency to the adjacent track in the ATI safe zone falls below a threshold write frequency.
2 more elements
Dependencies are inferred from the claim text.