PREDICTIVE READ/WRITE INHIBIT DECISION USING FUZZY LOGIC

    公开(公告)号:CA2089788A1

    公开(公告)日:1993-10-11

    申请号:CA2089788

    申请日:1993-02-18

    Applicant: IBM

    Abstract: A method for predicting and avoiding data errors by predicting disk drive read-write inhibit requirements in response to at least two parameters including a head position error and velocity with respect to the track centerline. A write or read inhibit signal is generated in response to selected combinations of these parameters to minimize soft read errors arising from track misregistration and to avoid hard errors arising from overwriting data recorded in an adjacent track. The read and write inhibit strategy is described as a pair of linguistic control rules suitable for implementation in a Fuzzy Logic Controller.

    PREDICTIVE READ/WRITE INHIBIT DECISION USING FUZZY LOGIC

    公开(公告)号:CA2089788C

    公开(公告)日:1996-10-08

    申请号:CA2089788

    申请日:1993-02-18

    Applicant: IBM

    Abstract: A method for predicting and avoiding data errors by predicting disk drive read-write inhibit requirements in response to at least two parameters including a head position error and velocity with respect to the track centerline. A write or read inhibit signal is generated in response to selected combinations of these parameters to minimize soft read errors arising from track misregistration and to avoid hard errors arising from overwriting data recorded in an adjacent track. The read and write inhibit strategy is described as a pair of linguistic control rules suitable for implementation in a Fuzzy Logic Controller.

    Direct access storage device having compound actuator bearing system

    公开(公告)号:SG47369A1

    公开(公告)日:1998-04-17

    申请号:SG1995002209

    申请日:1995-01-20

    Applicant: IBM

    Abstract: In accordance with the invention, in a direct access storage device having a head for interaction with a storage medium and a moving actuator on which the head is mounted, the improvement comprises a compound bearing system for the actuator, said bearing system including a first bearing of low friction for small movements of the actuator; and a second bearing of higher friction for coarse movements of the actuator. The storage medium is preferably a rotating magnetic disk having a series of concentric circular tracks. A single servo system drives the actuator so that the head follows a selected track with motion of the first bearing, and movement of the head to a new track causes motion of the second bearing. Preferably the first bearing is a flex bearing and the second bearing is a ball bearing.

Patent Agency Ranking