Dynamic magnetic information storage or retrieval – General processing of a digital signal – Data in specific format
Patent
1993-08-12
1995-05-16
Hajec, Donald
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Data in specific format
360 51, 360 7702, G11B 509, G11B 5596
Patent
active
054166527
ABSTRACT:
A head records a track (e.g. a servo track) in a memory member outside of a clean room without using reference indices. In each of a plurality of cyclical movements (e.g. revolutions), signals (e.g. servo signals) are recorded in the track in an individual number of frames. Thereafter th e distance of the unrecorded portion of the track is determined. In the next cyclical movement, the head records signals in an individual number of frames contiguous to the frames previously recorded, in a track distance dependent upon such individual number relative to the number of frames still unrecorded and upon the distance determined for the unrecorded track portion. In a last cyclical movement, the head records a single frame in a particular spatial relationship with the first and last frames. In a specific embodiment, 2.sup.N-K frames may be recorded in the K cyclical movement. Additional signals may thereafter be recorded by the head in tracks in a single cyclical movement. In another embodiment, each individual number of frames continue to be recorded in the first track in each cyclical movement until the frames occupy a distance, within particular limits, dependent upon the unrecorded length of the track and upon the individual number of frames relative to the number of frames still unrecorded. In a further embodiment, sectors and data sectors following the sectors are recorded with signals in progressive cyclical movements in a manner similar to the recording of the sectors in such revolutions in the first embodiment.
REFERENCES:
patent: 3540022 (1970-11-01), Berger
patent: 3893172 (1975-07-01), Celek
patent: 4068268 (1978-01-01), Idemoto et al.
patent: 4131920 (1978-12-01), Berger
patent: 4371902 (1983-02-01), Baxter et al.
patent: 5153788 (1992-10-01), Nishikawa et al.
patent: 5164863 (1992-11-01), Janz
patent: 5164866 (1992-11-01), Sano et al.
Hajec Donald
Kim Won Tae C.
Roston Ellsworth R.
Schwartz Charles H.
Servo Track Writer Corporation
LandOfFree
Apparatus for, and methods of, recording signals in tracks on a does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for, and methods of, recording signals in tracks on a , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for, and methods of, recording signals in tracks on a will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-642466