Phase and period synchronization for a slave disk drive

Details Phase and period synchronization for a slave disk drive Phase and period synchronization for a slave disk drive

1990-05-31

1992-10-27

Dixon, Joseph L.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

360 7303, 318625, G11B 1546

Patent

active

051595036

ABSTRACT:
In a system equipped with a plurality of magnetic disk devices, one magnetic disk device is used as a device (master unit) for generating reference signals for rotating other plurality of devices in synchronism. Other one or more magnetic disk devices (slave units) are rotated in synchronism following the reference signals generated from the master unit. In order to maintain the synchronism of revolution between the master unit and the slave units, the conditions of revolution of the two spindle motors are compared to maintain the synchronism of revolution. Index pulses recorded on the magentic disks of the master unit and the slave units are used as reference signals for maintaining synchronism of revolutions. Index pulses from the master unit and the slave units are compared to find a phase difference signal and a period difference signal, and the rotational speed of the slave units is compensated by using these two signals.

REFERENCES:
patent: 3503058 (1970-03-01), Ault et al.
patent: 3893178 (1975-07-01), Sordello
patent: 4471390 (1984-09-01), Hamann
patent: 4618897 (1986-10-01), Johnson et al.
patent: 4907105 (1990-06-01), Kurzweil, Jr.

Affiliated with

Also associated with

Rating

Phase and period synchronization for a slave disk drive does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Phase and period synchronization for a slave disk drive, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase and period synchronization for a slave disk drive will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-910273