Binding shingled recording bands

Patent metadata

Field	Value
Publication number	US-2016012850-A1
Application number	US-201314028399-A
Country	US
Kind code	A1
Filing date	Sep 16, 2013
Priority date	Sep 16, 2013
Publication date	Jan 14, 2016
Grant date	—

Abstract

Systems and methods are disclosed for binding shingled recording bands in data storage devices, particularly devices employing shingled magnetic recording. In one embodiment, an apparatus may comprise a controller configured to define boundaries of an area of a data storage medium based on a constraint and a list of defective sectors. In another embodiment, an apparatus may comprise a data storage device including a memory configured to store data in a shingled manner where one track partially overlaps an adjacent track, and a controller configured to define boundaries of a plurality of bands, each band including a plurality of tracks of the memory, based on the results of an error discovery scan for defective sectors of the memory.

First claim

1 . An apparatus comprising:
a controller configured to:
perform a defect discovery scan on a data storage medium to determine defective sectors;
define boundaries of a writable area of a band of the data storage medium based on a constraint and defective sectors located in the band, the band including a plurality of shingled tracks of the data storage medium where one track partially overlaps an adjacent track.

2 . The apparatus of claim 1 further comprising:
the controller further configured to define boundaries of the writable area by designating a first track and a last track.

3 . The apparatus of claim 1 further comprising:
the constraint includes an amount of time to:
read data from the writable area;
modify the read data; and
write the modified data to the writable area.

4 . (canceled)

5 . The apparatus of claim 1 further comprising:
the constraint includes a selected number of non-defective data sectors in the writable area.

6 . The apparatus of claim 5 further comprising:
the controller configured to:
define the boundaries of the writable area by designating at least one guard track to separate the writable area from other writable data sectors, the at least one guard tracks not being used to store user data.

7 . The apparatus of claim 1 comprising the controller further configured to:
define boundaries of the writable area based on a first selected capacity; and
define boundaries of another area of the data storage medium based on a second selected capacity different from the first selected capacity, the another area also configured to store data in a shingled manner.

8 . The apparatus of claim 1 further comprising:
the controller further configured to perform the defect discovery scan on the data storage medium to obtain a list of the defective sectors prior to defining the boundaries of the writable area.

9 . The apparatus of claim 8 further comprising:
the controller configured to format tracks on the data storage medium prior to performing the defect discovery scan.

10 . A method comprising:
formatting a data storage medium; performing a defect discovery scan on the data storage medium to determine defective sectors; defining boundaries of a writable area of a band of the data storage medium based on a constraint and defective sectors located in the band, the band including a plurality of shingled tracks of the data storage medium where one track partially overlaps an adjacent track.

11 . (canceled)

12 . The method of claim 10 further comprising:
defining boundaries of the writable area includes designating a first track and a last track.

13 . The method of claim 12 further comprising:
the constraint includes a minimum number of non-defective data sectors in the writable area.

14 . The method of claim 13 further comprising:
defining the boundaries of the writable area includes designating at least one guard track to separate the writable area from writable data sectors of the data storage medium outside the writable area, the at least one guard track not being used to store user data.

15 . The method of claim 10 further comprising:
performing the defect discovery scan on the data storage medium to obtain a list of the defective sectors prior to defining boundaries of the writable area.

16 . (canceled)

17 . The method of claim 10 further comprising:
defining boundaries of the writable area further based on a logical data capacity selected by a user.

18 . An apparatus comprising:
a data storage device including:
a memory configured to store data in a shingled manner where one track partially overlaps an adjacent track;
a controller configured to;
perform an error discovery scan to determine defective sectors of the memory; and
define boundaries of writable areas of a plurality of bands, each band including a plurality of tracks of the memory, based on the results of the error discovery scan and a selected band constraint.

19 . The apparatus of claim 18 further comprising the controller configured to:
define the boundaries based on the selected band constraint that each writable area of a band includes a minimum number of usable data sectors after considering defective data sectors.

20 . The apparatus of claim 19 further comprising the controller configured to:
define guard tracks to separate each band in the plurality of bands from writable data sectors of adjacent bands, the guard tracks not being used to store user data; and
define the guard tracks to include defective data sectors located in a first track or last track of each band.

Assignees

• Seagate Technology Llc

Inventors

• Feldman Timothy R

Classifications

• G11B20/1889 Primary

  with discs · CPC title

• G11B20/1217 Primary

  on discs · CPC title

• G11B20/1258

  where blocks are arranged within multiple radial zones, e.g. Zone Bit Recording or Constant Density Recording discs, MCAV discs, MCLV discs · CPC title

• G11B27/322

  used signal is digitally coded · CPC title

• G11B2020/1292

  Enhancement of the total storage capacity · CPC title