公开(公告)号：DE69315270T2

公开(公告)日：1998-05-28

申请号：DE69315270

申请日：1993-07-15

Applicant: IBM

Inventor： BROWN DANA HENRY ,  ERICKSON KEVIN JACK ,  GOOD DANIEL L ,  GREENBERG RICHARD ,  HERMAN PETER MAURICE ,  OTTESEN HAL HJALMAR

IPC: G06F3/06 ,  G06F12/16 ,  G11B19/04 ,  G11B19/12 ,  G11B20/10 ,  G11B20/18 ,  G11B5/55

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.

公开(公告)号：DE69315270D1

公开(公告)日：1998-01-02

申请号：DE69315270

申请日：1993-07-15

Applicant: IBM

Inventor： BROWN DANA HENRY ,  ERICKSON KEVIN JACK ,  GOOD DANIEL L ,  GREENBERG RICHARD ,  HERMAN PETER MAURICE ,  OTTESEN HAL HJALMAR

IPC: G06F3/06 ,  G06F12/16 ,  G11B19/04 ,  G11B19/12 ,  G11B20/10 ,  G11B20/18 ,  G11B5/55

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.