Redundant disk storage system.

摘要

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.