Data write management

Patent metadata

Field	Value
Publication number	US-9373347-B2
Application number	US-201414228354-A
Country	US
Kind code	B2
Filing date	Mar 28, 2014
Priority date	Mar 28, 2014
Publication date	Jun 21, 2016
Grant date	Jun 21, 2016

Abstract

Implementations disclosed herein provide systems and methods for data write management in a storage device responsive to detection of a disturbance. Responsive to the detection of the disturbance, a write operation is paused and a transducer head is moved from a first position on the target data track to a second position separated from the first position by at least one data track. At the second position, the write operation is resumed.

First claim

What is claimed is:

1. A method comprising:
detecting a disturbance when a write element is at a first position and writing data of a write operation to a target data track on a storage medium;
responsive to the detection operation, pausing the write operation;
modifying the write operation to direct data to a series of alternating data tracks so long as the disturbance persists above a predetermined threshold;
repositioning the write element; and
resuming the write operation when the write element is at a second position separated from the first position by at least one data track.

2. The method of claim 1 , further comprising:
dynamically mapping the data associated with the first position to the second position.

3. The method of claim 1 , wherein the disturbance is a vibration caused by a force external to the storage medium.

4. The method of claim 1 , wherein the second position is closer to an inner diameter of the storage medium than the first position.

5. The method of claim 1 , wherein the second position is on a data track directly adjacent to the target data track.

6. The method of claim 1 , wherein the second position is separated from the first position by one data track and one guard track.

7. The method of claim 1 , wherein the storage medium is a shingled magnetic recording (SMR) medium.

8. The method of claim 1 , wherein the write operation is completed without performing a write retry of any data track.

9. The method of claim 1 , further comprising:
detecting the disturbance at a subsequent time during the write operation;
pausing the write operation responsive to the detection at the subsequent time; and
resuming the write operation when the write element is at a third position, the third position separated from the second position by at least one data track.

10. A recording system comprising:
a disturbance module configured to detect a disturbance when a write element is at a first position and writing data of a write operation to a target data track on a storage medium;
a controller configured to modify the write operation to direct data to a series of alternating data tracks so long as the disturbance persists above a predetermined threshold and to reposition the write element responsive to the detection of the disturbance; and
a dynamic mapping module configured to dynamically map data from a location associated with the first position to a shifted location associated with a second position, the second position being closer to an inner diameter of the storage medium than the first position.

11. The recording system of claim 10 , wherein the second position is separated from the first position by at least one data track.

12. The recording system of claim 10 , wherein the second position is on a data track adjacent to the target data track.

13. The recording system of claim 10 , wherein the second position is separated from the first position by at least one guard track.

14. The recording system of claim 13 , wherein the write operation is a continuous write operation to a plurality of consecutive data tracks.

15. The recording system of claim 10 , wherein the storage medium is a shingled magnetic recording (SMR) medium.

16. A recording device comprising:
a processor configured to:
detect a vibration during a write operation to a plurality of consecutive data tracks, the vibration of a magnitude that exceeds a predetermined threshold; and
responsive to the detection of the vibration, modify the write operation so that data is not written to alternating data tracks in the plurality of consecutive data tracks until the vibration is of a magnitude that does not exceed the predetermined threshold.

17. The recording device of claim 16 , wherein the processor is further configured to:
detect that the vibration no longer exceeds the predetermined threshold; and
modify the write operation so as to write data to each of the remaining data tracks in the plurality of consecutive data tracks.

18. The recording device of claim 16 , wherein the processor is further configured to:
determine that an amount of space included in the alternating data tracks exceeds a predetermined cap.

19. The recording device of claim 18 , wherein the processor is further configured to:
retry a data-write to at least one data track responsive to the determination operation.

20. The recording device of claim 16 , wherein the recording device is a shingled magnetic recording device.

Assignees

• Seagate Technology Llc

Inventors

• Kim Daniel Suhwan
• Song Jae Ik
• Shin Dong Hyuck

Classifications

• G11B5/59694

  System adaptation for working during or after external perturbation, e.g. in the presence of a mechanical oscillation caused by a shock · CPC title

• G11B5/5582 Primary

  system adaptation for working during or after external perturbation, e.g. in the presence of a mechanical oscillation caused by a shock · CPC title