Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the record
Patent
1994-06-27
1995-09-19
Tupper, Robert S.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the record
360 48, 360134, 360132, G11B 509, G11B 1518
Patent
active
054521505
ABSTRACT:
The tape in a data cartridge has a beginning of tape (BOT) zone adjacent a leading end, a load point (LP) zone adjacent the BOT zone, an end of tape (EOT) zone adjacent a trailing end, an early warning (EW) zone adjacent the EOT zone, and a data recording (DR) zone between the LP and EW zones. Servo tracks extending between the BOT and EOT enable the closed-loop servo operation of a tape deck during the recording of data at data flux transition densities within a predetermined range of flux transition densities. A BOT indicator includes a first type magnetic marker extending throughout the BOT zone and has a BOT flux density. An LP indicator includes spaced second type magnetic markers on the servo tracks at the border of the LP and DR zones. An EW indicator which is identical to the LP indicator is located on the servo tracks at the border of the DR and EW zones. An EOT indicator includes a first type marker extending throughout the EOT zone and has an EOT flux density. Digitally encoded cartridge information indicators including the spaced second type markers are located in each of the BOT and EOT zones. The BOT and EOT flux densities are different from one another, and sufficiently different from the data flux transition densities to enable the BOT and EOT indicators to be distinguished from the data. The second type markers of the LP and EW and cartridge information indicators are sufficiently different from the servo carrier flux density to enable the indicators to be distinguished from the servo carrier.
REFERENCES:
patent: 3692255 (1972-09-01), Von Behren
patent: 4422111 (1983-12-01), Moeller et al.
patent: 4472750 (1984-09-01), Klumpp et al.
patent: 4835628 (1989-05-01), Hinz et al.
patent: 4975791 (1990-12-01), Eggebeen
patent: 5008765 (1991-04-01), Youngquist
patent: 5057950 (1991-10-01), Ozaki et al.
patent: 5070419 (1991-12-01), Kiyonaga
patent: 5073834 (1991-12-01), Best et al.
patent: 5081548 (1992-01-01), Inazawa et al.
patent: 5091805 (1992-02-01), Odaka et al.
patent: 5101302 (1992-03-01), Schonthaler et al.
patent: 5280402 (1994-01-01), Anderson et al.
patent: 5291348 (1994-03-01), Copolillo
patent: 5321570 (1994-06-01), Behr et al.
patent: 5327305 (1994-07-01), Thomas
patent: 5396376 (1995-03-01), Chambors et al.
Unformatted Magnetic Tape Cartridge for Information Interchange by Quarter-Inch Cartridge Drive Standards, Inc. (QIC Development Standard), QIC-139, Revision E, Dec. 9, 1993.
Henneberger Stacy A.
Hill Christopher L.
Molstad Richard W.
Olson Alan R.
Seeman Steven R.
Dennis II Charles L.
Evans Jefferson
Griswold Gary L.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
LandOfFree
Data cartridge with magnetic tape markers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Data cartridge with magnetic tape markers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data cartridge with magnetic tape markers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1833113