公开(公告)号：DE69328853T2

公开(公告)日：2000-12-07

申请号：DE69328853

申请日：1993-09-13

Applicant: IBM

Inventor： CANDELARIA SUSAN KAY ,  HANSON DEAN LEE ,  KWOK ROBERT LAM ,  LANE KENNETH WAYNE ,  NORDAHL DONALD MARVIN ,  REID MARK ALBERT ,  SHERMAN II WILLIAM GRISWOLD

IPC: G06F3/06 ,  G11B19/00 ,  G11B19/02 ,  G11B27/00

Abstract: A method and system for enhancing efficiency of data accessing within a storage subsystem, preferably including a DASD with multiple disks, which is coupled to a host system via a storage subsystem controller. Recording tracks are accessed utilizing multiple switchable transducer heads. A signal transmitted from the host system is utilized to define a transducer head switching table within the storage subsystem controller listing each track to be accessed and an associated control parameter for selecting a particular transducer head to be utilized to access a subsequent track. Each time the end of an accessed track is encountered, this table is accessed and the control parameter associated with that track is accessed and coupled to the DASD in order to select a subsequent track for access. A pointer is established into this table at the listing of an initially accessed track and access may be terminated when that pointer is encountered.

公开(公告)号：DE69328853D1

公开(公告)日：2000-07-20

申请号：DE69328853

申请日：1993-09-13

Applicant: IBM

Inventor： CANDELARIA SUSAN KAY ,  HANSON DEAN LEE ,  KWOK ROBERT LAM ,  LANE KENNETH WAYNE ,  NORDAHL DONALD MARVIN ,  REID MARK ALBERT ,  SHERMAN II WILLIAM GRISWOLD

IPC: G06F3/06 ,  G11B19/00 ,  G11B19/02 ,  G11B27/00

Abstract: A method and system for enhancing efficiency of data accessing within a storage subsystem, preferably including a DASD with multiple disks, which is coupled to a host system via a storage subsystem controller. Recording tracks are accessed utilizing multiple switchable transducer heads. A signal transmitted from the host system is utilized to define a transducer head switching table within the storage subsystem controller listing each track to be accessed and an associated control parameter for selecting a particular transducer head to be utilized to access a subsequent track. Each time the end of an accessed track is encountered, this table is accessed and the control parameter associated with that track is accessed and coupled to the DASD in order to select a subsequent track for access. A pointer is established into this table at the listing of an initially accessed track and access may be terminated when that pointer is encountered.