Enhanced capacity recording

• US 9,607,631 B2
• Filed: 11/24/2015
• Issued: 03/28/2017
• Est. Priority Date: 11/24/2014
• Status: Active Grant

• Current Assignee: Seagate Technology LLC (Seagate Technology Holdings Plc)
• Original Assignee: Seagate Technology LLC (Seagate Technology Holdings Plc)
• Inventors: Rausch, Tim, Ma, Minjie, Granz, Steven, Gao, Kaizhong, Zhu, Wenzhong, Gage, Edward C.
• Primary Examiner(s): Wong, K.
• Application Number:
  US14/950,577
• Publication Number:
  US 20160148626A1
• Time in Patent Office: 490 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: G11B 11/10506 by modulating only the light beam of the transducer
• CPC Class Codes: G11B 11/10515 Reproducing compensating pit shift G11B11/1053
• CPC Class Codes: G11B 11/10521 using a single light spot
• CPC Class Codes: G11B 11/10595 Control of operating function
• CPC Class Codes: G11B 20/12 Formatting, e.g. arrangement of data block or words on the record carriers within interface between computers and data recorders G06F3/06
• CPC Class Codes: G11B 20/1217 on discs
• CPC Class Codes: G11B 20/1833 by adding special lists or symbols to the coded information G11B20/1806, G11B20/1866 take precedence
• CPC Class Codes: G11B 20/1889 with discs
• CPC Class Codes: G11B 2005/0021 Thermally assisted recording using an auxiliary energy source for heating the recording layer locally to assist the magnetization reversal
• CPC Class Codes: G11B 2020/1222 ECC block, i.e. a block of error correction encoded symbols which includes all parity data needed for decoding pure error correction aspects G11B20/18
• CPC Class Codes: G11B 2020/1232 sector, i.e. the minimal addressable physical data unit
• CPC Class Codes: G11B 2020/1238 track, i.e. the entire a spirally or concentrically arranged path on which the recording marks are located
• CPC Class Codes: G11B 2020/1292 Enhancement of the total storage capacity
• CPC Class Codes: G11B 27/3027 used signal is digitally coded
• CPC Class Codes: G11B 5/012 Recording on, or reproducing or erasing from, magnetic disks G11B17/00, G11B19/00 take precedence
• CPC Class Codes: G11B 5/09 Digital recording
• CPC Class Codes: G11B 5/59633 Servo formatting G11B5/59627, G11B5/59677, G11B5/59683, G11B5/59688 take precedence
• CPC Class Codes: G11B 5/59638 Servo formatting apparatuses, e.g. servo-writers
• CPC Class Codes: G11B 5/6088 Optical waveguide in or on flying head

Abstract

A storage device includes a storage controller configured to write a band of data tracks using a first recording method until criterion is met. The first method may be a conventional recording method. After the criterion is met, the storage controller is configured to write data to the band using a second recording method. The second recording method may be an enhanced capacity recording method such as interlaced magnetic recording (IMR) or shingled magnetic recording (SMR).

Claims

1. A storage device, comprising:

a storage media; and

a storage device controller configured to;

write data to one or more data tracks of a target band on the storage media using a first recording scheme,

monitor the target band to determine whether a criterion has been satisfied;

read the one or more data tracks of the target band into a memory met responsive to a determination that the criterion has been satisfied; and

write the one or more data tracks to the target band on the storage media using a second recording scheme different from the first recording scheme.

2. The storage device of claim 1 wherein the storage device controller is further configured to measure a parameter of the target band to evaluate the criterion.

3. The storage device of claim 1, wherein the second recording scheme is at least one of interlaced media recording (IMR) and shingled media recording (SMR).

4. A method comprising:

receiving a command to write data to a track of a target band, the target band having recorded data using a first recording scheme;

determine whether a criterion is satisfied in the target band; and

responsive to a determination that the criterion is met, recording the write data to the target band using a second recording scheme, wherein the second recording scheme is different from the first recording scheme.

5. The method of claim 4, further comprising:

measuring a parameter of the target band determine whether the criterion is satisfied.

6. The method of claim 4, further comprising:

reading one or more data tracks of the target band into a memory and recording the write data and the one or more read data tracks using the second recording scheme.

7. The method of claim 4, wherein the criterion is based on a capacity threshold of the target band, the method further comprising:

responsive to a determination that the write data will increase the target band capacity above the capacity threshold, reading recorded data one or more tracks of the target band into memory before recording the write data and recorded data to the target band using the second recording scheme.

8. The method of claim 4, wherein the criterion is based on latency of the target band.

9. The method of claim 4, wherein the criterion is based on data heat of the target band.

10. The method of claim 4, wherein the criterion is based on data capacity threshold of the target band.

11. The method of claim 4, wherein the criterion is based on a data type of the write data.

12. The method of claim 4, wherein the second recording scheme is a high capacity recording scheme.

13. The method of claim 12, wherein the high capacity recording scheme is at least one of interlaced magnetic recording (IMR) and shingled magnetic recording (SMR).

20. The one or more processor-readable storage media of claim 13, wherein the second recording scheme is at least one of interlaced magnetic recording (IMR) and shingled magnetic recording (SMR.

14. One or more non-transitory processor-readable storage media encoding computer-executable instructions for executing on a storage device a computer process, the computer process comprising:

recording data to a target band of one or more data tracks using a first recording scheme; and

responsive to a determination that a criterion is satisfied in the target band of one or more data tracks, recording the data to the target band of one or more data tracks using a second recording scheme, the second recording scheme being different from the first recording scheme.

15. The one or more processor-readable storage media of claim 14, further comprising:

measuring a parameter of the target band to determine whether the criterion is satisfied.

16. The one or more processor-readable storage media of claim 14 further comprising:

reading one or more data tracks of the target band into memory; and

writing the one or more data tracks using the second recording scheme.

17. The one or more processor-readable storage media of claim 14, wherein the criterion is based on at least one of a latency of the target band, data heat of the target band, a data capacity threshold of the target band, and a data type of the data.

18. The one or more processor-readable storage media of claim 14, wherein the criterion is selected by a storage controller based on a write management scheme implemented by the storage controller.

19. The one or more processor-readable storage media of claim 14, wherein the criterion is selected by a user of the storage device through defining a security level of the data.

21. The one or more processor-readable storage media of claim 14, wherein the first recording scheme is a conventional recording scheme.