Disk drive optimized channel circuit
Номер патента: CA1274623A
Опубликовано: 25-09-1990
Автор(ы): Dean Curtis Palmer, Earl Albert Cunningham, Gregory John Kerwin, Jeffrey Ralph Roepke, Jonathan Darrel Coker, Richard Casimir Jaworski, Thomas Charles Christensen
Принадлежит: International Business Machines Corp
Опубликовано: 25-09-1990
Автор(ы): Dean Curtis Palmer, Earl Albert Cunningham, Gregory John Kerwin, Jeffrey Ralph Roepke, Jonathan Darrel Coker, Richard Casimir Jaworski, Thomas Charles Christensen
Принадлежит: International Business Machines Corp
Реферат: DISK DRIVE OPTIMIZED CHANNEL CIRCUIT Abstract of the Disclosure A magnetic disk drive channel circuitry is shown and described that generates eight incremental values of write current and eight incremental values of delta-V (the minimum voltage change per unit time which tests signals to discriminate between data and noise). Each of these variable parameter values may be program selected by a three bit bus signal. This variability testing of and adaptation to the optimum parameter value for each head media combination and by grouping tracks in contiguous data bands, the parameters may be optimized for tracks near the inner diameter, the outer diameter and in the middle band. The variable delta-V can also be used as an additional data recovery tool wherein re-reading with a lower value enhances recovery of missing bit errors and re-reading with an increased value can assist recovery from an extra bit error.
Method for detecting transient write errors in a disk drive by detecting thermal interference during write process
Номер патента: WO2002035541A2. Автор: Yiping Ma,Michael Dickson,John R. Stokes. Владелец: Iomega Corporation. Дата публикации: 2002-05-02.