Wide write disc certification process, apparatus and article of

Details Wide write disc certification process, apparatus and article of Wide write disc certification process, apparatus and article of

1997-11-18

2000-08-15

Kim, W. Chris

Dynamic magnetic information storage or retrieval

Checking record characteristics or modifying recording...

324212, G11B 502, G01R 3312

Patent

active

06104556&

ABSTRACT:
A disc certification process, apparatus and article of manufacture for improved testing efficiency employs a testing head having a write element and a read element supported adjacent a rotating disc recording surface. The write element has a width that defines a "wide" write track width of at least N times the read track width defined by the width of the read element, wherein N is an integer greater than 1. The write element writes a signal onto the recording surface of the disc during a first disc rotation, to define a first annular write track having a "wide" first write track width in the radial direction of the disc. Then, during a second rotation, the read element reads the signal written in a first reading track width defined within the "wide" first write track. Thereafter, the read element is stepped to another read position adjacent the first write track and the read element reads the signal written onto the recording surface in a second reading track width defined within the first write track. If the write track width is more than two times the width of each read track, then the read element may be stepped to one or more additional read positions to read the signal written onto the recording surface in one or more further reading track widths defined within the first write track. In this manner, one relatively wide write track is formed with a write track width at least as great as two or more read tracks. The signals read by the read head during the reading steps are analyzed to determine the quality of the recording surface.

REFERENCES:
patent: 4847558 (1989-07-01), Fisher et al.
patent: 5124849 (1992-06-01), Chur
patent: 5461517 (1995-10-01), Suda et al.
patent: 5822139 (1998-10-01), Ayabe

Affiliated with

Also associated with

Rating

Wide write disc certification process, apparatus and article of does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Wide write disc certification process, apparatus and article of , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wide write disc certification process, apparatus and article of will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2013669