Magnetic tape media having servo patterns

Patent metadata

Field	Value
Publication number	US-9865289-B2
Application number	US-201615271092-A
Country	US
Kind code	B2
Filing date	Sep 20, 2016
Priority date	Jun 18, 2008
Publication date	Jan 9, 2018
Grant date	Jan 9, 2018

Abstract

Magnetic tape media according to one embodiment includes a plurality of servo tracks having physical characteristics of being written by an apparatus that monitors a lateral position of the magnetic tape media passing over a servo writing head during a servo track writing operation and writes servo marks to the magnetic tape media. A timing of the writing of each servo mark is based on the monitored position of the magnetic tape media.

First claim

What is claimed is:

1. Magnetic tape media, comprising:
a plurality of servo tracks having physical characteristics of being written by an apparatus that monitors a lateral position of the magnetic tape media passing over a servo writing head during a servo track writing operation and writes consecutively-written servo marks to the magnetic tape media, a timing of the writing of each consecutively-written servo mark being based on the monitored position of the magnetic tape media, wherein a distance between the consecutively-written servo marks in the same servo track is smaller for servo marks written closer to an edge of the magnetic tape media nearest thereto than a distance between servo marks written relatively farther from the same edge of the magnetic tape media.

2. The magnetic tape media as recited in claim 1 , wherein each servo mark is individually written.

3. The magnetic tape media as recited in claim 1 , wherein a height of the servo marks is reduced after writing thereof, the height of the servo marks being measured in a direction perpendicular to a length of the magnetic tape media.

4. The magnetic tape media as recited in claim 1 , wherein the servo marks comprise a series of magnetically defined bars.

5. The magnetic tape media as recited in claim 1 , wherein a distance between the servo tracks is less than about 3 mm.

6. The magnetic tape media as recited in claim 1 , wherein at least one of the servo tracks has data encoded therein.

7. The magnetic tape media as recited in claim 1 , wherein the timing of the writing of each mark determines a spacing between consecutively-written marks in a direction parallel to a direction of tape travel across the servo writing head.

8. Magnetic tape media, comprising:
a plurality of servo tracks having a plurality of consecutively-written servo marks, a distance between each consecutively-written servo mark in a tape travel direction varying in direct correlation with a distance of the respective mark, as written, from an edge of the magnetic tape media in a cross-track direction, wherein a distance between the consecutively-written servo marks in the same servo track is smaller for servo marks written closer to an edge of the magnetic tape media nearest thereto than a distance between servo marks written relatively farther from the same edge of the magnetic tape media.

9. The magnetic tape media as recited in claim 8 , wherein each servo mark is individually written.

10. The magnetic tape media as recited in claim 8 , wherein a height of the servo marks is reduced after writing thereof, the height of the servo marks being measured in a direction perpendicular to a length of the magnetic tape media.

11. The magnetic tape media as recited in claim 8 , wherein the servo marks comprise a series of magnetically defined bars.

12. The magnetic tape media as recited in claim 8 , wherein a distance between the servo tracks is less than about 3 mm.

13. The magnetic tape media as recited in claim 8 , wherein at least one of the servo tracks has data encoded therein.

Assignees

• IBM

Inventors

• Biskeborn Robert G
• Imaino Wayne I

Classifications

• G11B5/584 Primary

  for track following on tapes · CPC title

• G11B5/00813

  magnetic tapes · CPC title

• G11B5/5926 Primary

  recorded in separate tracks, e.g. servo tracks · CPC title

• G11B15/60

  Guiding record carrier (guiding devices structurally associated with magazines or cassettes G11B23/04) · CPC title

• G11B2220/90

  Tape-like record carriers · CPC title