| 摘要 |
An improved disk file is disclosed including multiple independent transducer/actuator arrays disposed about a common disk (stack) and adapted to afford a plurality of alternate "Data-paths" whereby (virtually any) track on any disk may be accessed for data-in/data-out using a selectible one of several "data paths". In one type embodiment, this is implemented by switching-over between electronic-control stages when one such stage fails. In another type embodiment, it is afforded by providing overlapping track coverage by multiple head-units. Here, for any given (pair of) disk faces, each of several actuator arrays is assigned a respective set of tracks to cover as its "primary responsibility", also being assigned another adjacent set of tracks as its "secondary" (back-up) responsibility. Such arrangements can provide such benefits as "multiple paths to data", and can convert "Hard" failure to "Soft" failure.
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