公开(公告)号：DE69515081D1

公开(公告)日：2000-03-23

申请号：DE69515081

申请日：1995-04-18

Applicant: IBM

Inventor： TSURUMI MAKOTO ,  IWASA HIROYUKI ,  OKUMIYA HIROAKI ,  TAKESHITA AKIRA

IPC: G06F3/06 ,  G06F11/00 ,  G06F11/20 ,  G11B20/18 ,  G11C29/00

Abstract: The invention provides a redundant disk storage system comprising a hard disk drive device consisting of a pair of hard disk drives having a magnetic disk which is a magnetic recording medium for recording data and a magnetic head for recording and reading data recorded on said magnetic disk and a controller for controlling said hard disk drive device so as to record data identical to data transferred from a host computer in each of said pair of hard disk drives, read data from one of said pair of drives, and transfer read data to the host computer; said controller controls said hard disk drive device so that data identical to data transferred from said host computer is recorded at different locations on the respective magnetic disks of said pair of drives.

公开(公告)号：DE69515081T2

公开(公告)日：2000-09-14

申请号：DE69515081

申请日：1995-04-18

Applicant: IBM

Inventor： TSURUMI MAKOTO ,  IWASA HIROYUKI ,  OKUMIYA HIROAKI ,  TAKESHITA AKIRA

IPC: G06F3/06 ,  G06F11/00 ,  G06F11/20 ,  G11B20/18 ,  G11C29/00

Abstract: The invention provides a redundant disk storage system comprising a hard disk drive device consisting of a pair of hard disk drives having a magnetic disk which is a magnetic recording medium for recording data and a magnetic head for recording and reading data recorded on said magnetic disk and a controller for controlling said hard disk drive device so as to record data identical to data transferred from a host computer in each of said pair of hard disk drives, read data from one of said pair of drives, and transfer read data to the host computer; said controller controls said hard disk drive device so that data identical to data transferred from said host computer is recorded at different locations on the respective magnetic disks of said pair of drives.

公开(公告)号：SG30336A1

公开(公告)日：1996-04-01

申请号：SG1995000222

申请日：1995-04-06

Applicant: IBM

Inventor： TAKESHITA AKIRA ,  OKUMIYA HIROAKI ,  IWASA HIROYUKI ,  TSURUMI MAKOTO

IPC: G06F3/06 ,  G06F12/16

公开(公告)号：JPH07281840A

公开(公告)日：1995-10-27

申请号：JP7621394

申请日：1994-04-14

Applicant: IBM JAPAN

Inventor： TSURUMI MAKOTO ,  IWASA HIROYUKI ,  YAMIYA HIROAKI ,  TAKESHITA TERU

IPC: G06F3/06 ,  G06F11/00 ,  G06F11/20 ,  G11B20/18 ,  G11C29/00

Abstract: PURPOSE:To perform data transfer between a host computer and an HDD without providing a data RAM in a control unit. CONSTITUTION:After a bus controller 40 is set when the power source is turned on to change the operation of buffer selectors 18 and 20 from B to C, an ID command is sent to an HDD 1 and an HDD 2. After the controller 40 is set to change the operation of the selectors 18 and 20 from C to B, parameters stored in the RAMs of the HDD 1 and HDD 2 are stored in the RAM of an MPU 26 and the stored parameters are changed into parameters for a mirror disk. The parameters for the mirror disk which are changed are written in the RAM of the HDD 1. And, the parameters for the mirror disk are read out of the RAM of the HDD 1 and sent to a host computer 10 at the same time.