公开(公告)号：JP2002319253A

公开(公告)日：2002-10-31

申请号：JP2002110025

申请日：2002-04-12

Applicant: IBM

Inventor： TEIMOSHII JIYOSEFU CHIYAINAA ,  MAAKU DERORUMAN SUKARUTSU ,  WEBB BUCKNELL C ,  YARMCHUK EDWARD JOHN

IPC: G11B5/48 ,  G11B5/55 ,  G11B5/596 ,  G11B21/08 ,  G11B21/10 ,  G11B27/30

Abstract: PROBLEM TO BE SOLVED: To provide a system and a method for self-servowriting which are more flexible and to overcome the defects of known self-servowriting technology. SOLUTION: The method and system for self-servowriting to a data storage medium are disclosed and include a step or means for servo control over the propagation bursts of a propagation pattern arranged on a track other than a last track. A reference level used for positioning a recording head is kept within a usable dynamic range needed, to hold servo track intervals constant over the medium. The method and system are described, in relation to a rotary actuator having read and write heads at an interval. A similar method for writing a trigger or timing bursts of the propagation pattern is also disclosed.

公开(公告)号：JPH04228153A

公开(公告)日：1992-08-18

申请号：JP10370891

申请日：1991-03-14

Applicant: IBM

Inventor： JIYON SUCHIYUWAATO BESUTO ,  TEIMOSHII JIYOSEFU CHIYAINAA ,  TOOMASU UIRIAMU GURASAA ,  RICHIYAADO GURENBAAGU ,  ABUIJITSUTO MUKAJII MUKAJII ,  JIERII RII NEUBAUAA ,  JIYON RARUFU REIDENBATSUCHI ,  ROBAATO ERUSUUOOSU SUKOTSUPU ,  ROBAATO AREN SUKURANTON

IPC: G11B20/12 ,  G06F3/06 ,  G06F11/00 ,  G06F11/10 ,  G06F11/20 ,  G11B20/18 ,  G11B33/02 ,  G11C29/00

Abstract: PURPOSE: To prevent the loss of data even when one driven is out of order by storing data in a first to a (n-1)th drives and parity information in an nth drive. CONSTITUTION: A disk storage system includes an array/cluster controller 5 and plural storage mechanism arrays 7-9. The constitution of four (n=4) separated disk files 7a-7d into which the respective arrays are divided is preferable since a half/high disk drive is geometrically matched with an existing shape factor of a personal computer. The array is designed as the subsystem of a direct access storage device, is a system so that the data are stored and fetched at high speed and with high reliability and the data are dispersed between the constituent elements of the system.