Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Drum record
Patent
1991-08-29
1994-04-12
Callahan, Timothy P.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Drum record
360109, 360114, 360105, 360103, 360 75, G11B 555
Patent
active
053031008
ABSTRACT:
A magnetic disk device having a floating-type magnetic head, for use with a disk-shaped recording medium having a sliding area for the floating-type magnetic head formed outside a recording area. The length in the disk radial direction of a suspension supporting the floating-type magnetic head is varied depending on individual magnetic disk devices. In another arrangement, a control means is provided for setting two reference values so that a radial position of the floating-type magnetic head detected by a detection section is compared with these reference values, and for alternating one of the preset reference values to the other reference value upon receiving a rotation stop signal. In still another arrangement, control means is provided, whereby a radial position for sliding of the floating-type magnetic head is randomly varied within the sliding area. According to these arrangements, since the radial position for sliding of the floating-type magnetic head is varied within the sliding area without being located at the same position, abrasion within the sliding area can be dispersed. As a result, it becomes possible to extend the longevities of the floating-type magnetic head and the recording medium.
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Katayama Hiroyuki
Miyake Tomoyuki
Nakayama Junichiro
Ohta Kenji
Callahan Timothy P.
Conlin David G.
Corless Peter F.
O'Connell Robert F.
Sharp Kabushiki Kaisha
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