Magnetic storage device readers

Patent metadata

Field	Value
Publication number	US-9818445-B2
Application number	US-201614993694-A
Country	US
Kind code	B2
Filing date	Jan 12, 2016
Priority date	Jan 12, 2016
Publication date	Nov 14, 2017
Grant date	Nov 14, 2017

Abstract

Implementations described and claimed herein includes a storage device comprising a plurality of readers, including a first subset of readers configured to read a first subset of tracks and a second subset of readers configured to read a second subset of tracks, the first subset of tracks being wider than the second subset of tracks. In another implementation, the readers in the first subset of readers are wider than the readers in the second subset of readers. The wider readers may be configured to recover servo information and the narrow readers may be configured to recover data information. The storage devices may include two-dimensional magnetic recording, conventional perpendicular magnetic recording, shingled magnetic recording, multi-sensor magnetic recording, and interlaced magnetic recording.

First claim

What is claimed is:

1. A storage device comprising:
a plurality of readers, including a first subset of readers to read a first subset of tracks and a second subset of readers to read a second subset of tracks, the first subset of tracks being wider than the second subset of tracks and the first subset of readers being wider than the readers in the second subset of readers.

2. The storage device of claim 1 , wherein the readers in the first subset of readers are configured to recover servo information in the first subset of tracks.

3. The storage device of claim 1 , wherein the readers in the first subset of readers are configured to recover data information in the first subset of tracks.

4. The storage device of claim 1 , wherein the readers in the second subset of readers are configured to recover data information in the readers in the second subset of tracks.

5. The storage device of claim 1 , wherein the readers in the first subset of readers are co-planar in a cross-track direction to the readers in the second subset of readers.

6. The storage device of claim 1 , wherein the readers in the second subset of readers are configured to be 65-105% of a track width of the second subset of tracks.

7. The storage device of claim 1 , wherein widths of the readers in the first subset of readers are configured to be 1.5-2 times a width of the second subset of readers.

8. A system comprising:
a transducer head, including two or more readers co-planar in a cross-track direction and configured to read data tracks and servo tracks of different width, the two or more readers including a first reader being wider than a second reader in the cross-track direction.

9. The system of claim 8 , wherein a width of the first reader is configured to be 1.5-2 times a width of the second reader.

10. The system of claim 8 , wherein the first reader is configured to recover servo information.

11. The system of claim 8 , wherein the first reader is configured to recover data information.

12. The system of claim 8 , wherein the second reader is configured to recover data information.

13. The system of claim 8 , wherein the system is one of a two-dimensional magnetic recording system, a conventional perpendicular magnetic recording system, a shingled magnetic recording system, a multi-sensor magnetic recording system, and an interlaced magnetic recording system.

14. A storage device comprising:
an interlaced magnetic recording system; and
a transducer head with two readers co-planar in a cross-track direction, including a first reader being wider than a second reader in the cross-track direction.

15. The storage device of claim 14 , wherein a width of the first reader is approximately 1.5-2 times a width of the second reader.

16. The storage device of claim 14 , wherein the first reader is configured to read a single-side trimmed bottom data field.

17. The storage device of claim 14 , wherein the first reader is configured to read an untrimmed bottom track data field and a servo data field.

18. The storage device of claim 14 , wherein the second reader is configured to read a top track data field and a single-sided trimmed bottom data field.

19. The storage device of claim 14 , wherein the second reader is configured to read a top track data field and a double-sided trimmed bottom data field.

20. The storage device of claim 14 , the storage device is a hard disk drive.

Assignees

• Seagate Technology Llc

Inventors

• Zhu Wenzhong
• Erden Mehmet F
• Haapala Kenneth A
• Tian Wei
• Gage Edward

Classifications

• G11B5/012 Primary

  Recording on, or reproducing or erasing from, magnetic disks (G11B17/00, G11B19/00 take precedence) · CPC title

• G11B20/1217 Primary

  on discs · CPC title

• G11B2020/1238

  track, i.e. the entire a spirally or concentrically arranged path on which the recording marks are located · CPC title

• G11B5/4813

  Mounting or aligning of arm assemblies, e.g. actuator arm supported by bearings, multiple arm assemblies, arm stacks or multiple heads on single arm (G11B5/484 takes precedence) · CPC title

• G11B5/4886

  relative to rotating disc · CPC title