Method and apparatus for automatically replacing defective recor

Details Method and apparatus for automatically replacing defective recor Method and apparatus for automatically replacing defective recor

1986-12-11

1989-01-03

Canney, Vincent P.

Excavating

360 48, 360 49, 360 7814, 369 54, G11B 2108, G11B 555, G11B 509

Patent

active

047961139

ABSTRACT:
A data storage apparatus wherein a read/write head writes or reads information on or from a rotating storage disk having a multiplicity of tracks, according to external signals. The storage disk has a special track which is unaccessible with the external signals, and which has multiple divisions corresponding to the tracks, the divisions consisting of first divisions and at least one second division, each of the first divisions corresponding to each normal track having no defect, and each of the at least one second division corresponding to each defective track which has a defect. Either the first divisions or the at least one second division storing burst signals indicative of the normal and defective tracks. The apparatus comprises a device for operating a head-positioning device and the read/write head to read the burst signals on the special track, and storing an identification number of each defective track, and a device responsive to a track access signal of the external control signals designating one of the normal and defective tracks, for counting a number of the at least one defective track whose identification number is smaller than that of the designated track, and positioning the read/write head on the track whose identification number is larger, by the counted number, than that of the designated track.

REFERENCES:
patent: 4498146 (1985-02-01), Martinez

Affiliated with

Also associated with

Rating

Method and apparatus for automatically replacing defective recor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for automatically replacing defective recor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for automatically replacing defective recor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2171961