Adaptive configuration of thermal asperity guard bands

Adaptive configuration of thermal asperity guard bands

Apparatus and method for reducing the effects of thermal asperities on a rotatable data recording surface. A data transducer writes user data to a first set of tracks at a first fly height above the recording surface. A compensation circuit detects a thermal asperity (TA) on the recording surface, a...

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Hauptverfasser: Xia, Lan, Gan, Swee Chuan Samuel, Li, Quan, Zhang, Lihong, Liu, Xiong
Format: Patent
Sprache:eng
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INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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creator Xia, Lan
Gan, Swee Chuan Samuel
Li, Quan
Zhang, Lihong
Liu, Xiong
description Apparatus and method for reducing the effects of thermal asperities on a rotatable data recording surface. A data transducer writes user data to a first set of tracks at a first fly height above the recording surface. A compensation circuit detects a thermal asperity (TA) on the recording surface, and establishes a guard band as a second set of tracks that are co-radial with the TA. The second set of tracks are deallocated and removed from service. The compensation circuit further defines a reserve band as a third set of tracks immediately adjacent the guard band, and selects an increased, second fly height that allows the data transducer to write data to the reserve band without contacting the TA. The second set of tracks may have a greater track pitch than the first set of tracks to compensate for the greater fly height.
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subjects INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
title Adaptive configuration of thermal asperity guard bands
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