Ultra high track density adaptive head core track pitch control
View Patent ↗Apparatuses and methods for adjusting the track pitches of the tracks on a data storage tape. In one variation, the method comprises adjusting the observed pitch between the tracks by applying variable amounts of pressure on the surface of the tape. In another variation, the pressure is applied to a localized region on the tape. The pressure can be modulated to induces a change in the physical characteristic of the tape in and around the area where pressure is applied. In another aspect, an apparatus is configured with a magnetic read-head for detecting written tracks on a magnetic tape, and an actuator is provided to apply pressure on the tape to control the track pitch of the written tracks.
1. A tape drive comprising:
a read-head having a plurality of transducers operable to read data from a plurality of tracks on a data storage tape; and
an actuator operable to adjust at least one track pitch of the tracks on the data storage tape by directly engaging a tape surface of the data storage tape to improve alignment between the tracks on the data storage tape with the transducers.
2. The tape drive according to claim 1 , wherein the actuator is operable to expand or contract a localized region on the data storage tape to match each of the tracks in the localized region with a corresponding transducer on the read-head.
3. The tape drive according to claim 1 , wherein the actuator is operable to modulate a tape tension in a localized area on the data storage tape to adjust the track pitches of the tracks in the localized area, and the localized area has a lateral dimension less than the width of the tape.
4. The tape drive according to claim 2 , where the actuator is operable to expand or contract a localized region on the data storage tape by applying varying amounts of pressure onto the tape surface.
5. The tape drive according to claim 4 , wherein the pressure applied onto the tape surface is applied on an area with a lateral dimension that is less than 50% the width of the data storage tape.
6. The tape drive according to claim 1 , further comprising:
a controller connected to the read head and the actuator.
7. The tape drive according to claim 6 , wherein the controller is operable to monitor the position of the tracks and control the actuator to adjust track pitches of the tracks on the data storage tape.
8. The tape drive according to claim 6 , wherein the controller comprises a feedback circuit for monitoring positions of the tracks on the data storage tape and adjusting a pressure applied by the actuator onto a surface on the data storage tape to maintain alignment between the tracks on the tape and the transducers on the read-head.
9. A method of operating a magnetic tape drive which transduces data to and from a magnetic tape, the method comprising:
reading data on the magnetic tape with a magnetic read-head, wherein the magnetic read-head comprises a plurality of transducers for simultaneously reading data from a plurality of tracks on the magnetic tape; and
adjusting at least one track pitch of the plurality of tracks on the magnetic tape by touching a tape surface of the magnetic tape to improve alignment between the tracks on the magnetic tape and transducers on the magnetic read-head.
10. The method according to claim 9 , wherein adjusting the track pitch comprises expanding or contracting the tape in order to match each of the tracks to a corresponding transducer on the magnetic read-head.
11. The method according to claim 9 , wherein adjusting the track pitch comprises modulating a tape tension in a localized area on the tape.
12. The method according to claim 11 , the localized area having a lateral dimension less than the width of the tape.
13. The method according to claim 10 , wherein expanding or contracting the tape comprises decreasing or increasing a pressure applied on the tape surface of the tape.
14. The method according to claim 13 , wherein the pressure applied on the surface of the tape is applied on a localized region relative to a width of the tape.
15. The method according to claim 14 , wherein the pressure applied on the surface of the tape is applied on an area with a lateral dimension that is less than 50% the width of the tape.
16. The method according to claim 9 , wherein adjusting the track pitch comprises varying the track pitches of the plurality of tracks to identify a match between the tracks and the transducers.
17. The method according to claim 10 , wherein adjusting the track pitch comprises minimizing a mismatch in lateral positions between the tracks and the magnetic transducers.
18. The method according to claim 9 , wherein adjusting the track pitch comprises varying a pressure on a localized region on the tape to induce a change in the track pitches.
19. The method according to claim 18 , wherein the localized region is less than the width of the tape.
20. The method according to claim 18 , wherein the pressure is applied with an actuator.
21. The method according to claim 18 , wherein the pressure is applied by moving the magnetic read-head into a surface of the magnetic tape.
22. The method according to claim 9 , wherein adjusting the track pitch comprises varying a position of the magnetic read-head.
23. The method according to claim 13 , wherein the pressure is applied to an area having a lateral dimension less than a width of the tape.
24. The method according to claim 9 , wherein adjusting comprises stretching a first area on the tape while keeping tension in a second area surrounding the first area at a constant level.
25. The method according to claim 9 , further comprising:
monitoring positions of at least two data tracks on the magnetic tape.
26. The method according to claim 9 , further comprising:
monitoring positions of at least two of the plurality of tracks on the magnetic tape, wherein the at least two of the plurality of tracks on the magnetic tape comprise data tracks;
detecting a servo track on the magnetic tape; and
adjusting a lateral displacement of the magnetic tape based on the servo track.
27. A method of reading data from a magnetic tape, the method comprising:
detecting track pitches of a plurality of tracks on a magnetic tape; and
continuously adjusting at least one track pitch of the plurality of tracks by physically contacting a surface of the magnetic tape to match corresponding magnetic transducers on a magnetic read-head.
28. The method according to claim 27 , wherein at least two of the plurality of tracks on the magnetic tape comprise data tracks, and at least one of the plurality of tracks on the magnetic tape comprises a servo track.
29. The method according to claim 27 , further comprising:
reading data from at least two of the plurality of tracks.
30. The method according to claim 27 , further comprising:
positioning the tape laterally based on the servo track.
31. The method according to claim 30 , wherein continuously adjusting track pitches comprises applying a pressure to a localized area on the magnetic tape.
32. The method according to claim 27 , further comprising:
detecting a servo track; and
laterally adjusting a position of the magnetic tape relative to the magnetic read-head.
33. The method according to claim 32 , wherein continuously adjusting the track pitch comprises applying a pressure on a localized area on a face of the magnetic tape.
34. The method according to claim 33 , wherein the localized area has a lateral dimension and the tape has a width more than twice the lateral dimension of the localized area.
35. The method according to claim 32 , wherein continuously adjusting the track pitch comprises applying varying amounts of pressure on an area on a top surface of the tape, wherein the top surface comes into contact with the magnetic read-head.
36. The method according to claim 35 , wherein the area has a lateral dimension less than the width of the magnetic tape, and continuously adjusting the track pitch further comprises utilizing a predetermined algorithm to locate a best match between the plurality of tracks and the corresponding magnetic transducers on the magnetic read-head.
37. The method according to claim 27 , wherein continuously adjusting the track pitch comprises applying varying amounts of pressure on an area at a top surface of the tape, wherein the top surface comes into contact with the magnetic read-head, and the area has a lateral dimension less than the width of the magnetic tape.
38. The method according to claim 27 , wherein the plurality of tracks comprises at least two outer tracks on a channel being read by the read-head.
39. The method according to claim 38 , further comprising:
detecting a servo track; and
laterally adjusting a position of the magnetic tape relative to the magnetic read-head.
40. The method according to claim 27 , wherein continuously adjusting the track pitch comprises varying a position of the magnetic read-head to increase or decrease a pressure between the magnetic read-head and the tape.
41. The method according to claim 27 , wherein continuously adjusting the track pitch comprises applying varying amounts of pressure on each of the plurality of tracks to adjust the track pitch.
42. The method according to claim 27 , wherein continuously adjusting the track pitch comprises applying pressures on a plurality of areas on the tape.