Excavating
Patent
1992-07-30
1995-02-21
Baker, Stephen M.
Excavating
371 102, 371 12, 371 401, 395575, G06F 1108, G06F 1114, G11B 2018
Patent
active
053922905
ABSTRACT:
A secondary data storage system for a host computer system includes a disk drive system having a device controller, at least a first magnetic disk and a read/write magnetic transducer positionable with respect to a recording surface of each magnetic disk. A write operation exposes data on adjacent tracks to potential damage if an off track condition occurs to the transducer during a write. A method for controlling write operations through the device controller provides backup of data in tracks adjacent to a target track for the write operation prior to the write operation occurring. The method detects occurrence of events resulting in an off track condition of the magnetic transducer relative to a target track. Occurrence of such an event triggers a determination of damage to the contents of tracks adjacent to the target track and restoration of those tracks. Write operations to the target track are blocked until shock events discontinue.
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Brown Dana H.
Erickson Kevin J.
Good Daniel L.
Greenberg Richard
Herman Peter M.
Baker Stephen M.
Billion Richard E.
Dillon Andrew J.
International Business Machines - Corporation
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