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

Inventor： SRI-JAYANTHA MUTHUTHAMBY ,  KUMAR ARUN SHARMA SURESH ,  KHANNA VIJAYESHWAR

IPC: G11B21/02 ,  F16C21/00 ,  G11B5/55 ,  G11B21/08 ,  G11B21/10

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.