SG142225A1 - Servo patterns for patterned media - Google Patents

Servo patterns for patterned media

Info

Publication number
SG142225A1
SG142225A1 SG200708499-9A SG2007084999A SG142225A1 SG 142225 A1 SG142225 A1 SG 142225A1 SG 2007084999 A SG2007084999 A SG 2007084999A SG 142225 A1 SG142225 A1 SG 142225A1
Authority
SG
Singapore
Prior art keywords
island
patterned media
servo patterns
gray code
servo
Prior art date
Application number
SG200708499-9A
Other languages
English (en)
Inventor
Thomas Robert Albrecht
Mario Blaum
Ksenija Lakovic
Bruce Alexander Wilson
Satoshi Yamamoto
Original Assignee
Hitachi Global Storage Tech
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Global Storage Tech filed Critical Hitachi Global Storage Tech
Publication of SG142225A1 publication Critical patent/SG142225A1/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • G11B21/10—Track finding or aligning by moving the head ; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
    • G11B5/855—Coating only part of a support with a magnetic layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y10/00—Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
    • G11B20/1423—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code
    • G11B20/1426—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code conversion to or from block codes or representations thereof
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/74—Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum
    • G11B5/743—Patterned record carriers, wherein the magnetic recording layer is patterned into magnetic isolated data islands, e.g. discrete tracks
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/74—Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum
    • G11B5/82—Disk carriers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
    • G11B2020/1264—Formatting, e.g. arrangement of data block or words on the record carriers wherein the formatting concerns a specific kind of data
    • G11B2020/1265—Control data, system data or management information, i.e. data used to access or process user data
    • G11B2020/1281—Servo information
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
    • G11B2020/1484—Codewords used in servo patterns
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2508—Magnetic discs
    • G11B2220/2516—Hard disks
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/596—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks
    • G11B5/59633—Servo formatting
    • G11B5/59655—Sector, sample or burst servo format

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Nanotechnology (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Magnetic Record Carriers (AREA)
  • Moving Of The Head To Find And Align With The Track (AREA)
SG200708499-9A 2006-10-19 2007-09-20 Servo patterns for patterned media SG142225A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/584,408 US7715137B2 (en) 2006-10-19 2006-10-19 Servo patterns for patterned media

Publications (1)

Publication Number Publication Date
SG142225A1 true SG142225A1 (en) 2008-05-28

Family

ID=39016263

Family Applications (1)

Application Number Title Priority Date Filing Date
SG200708499-9A SG142225A1 (en) 2006-10-19 2007-09-20 Servo patterns for patterned media

Country Status (7)

Country Link
US (2) US7715137B2 (de)
EP (1) EP1914730A3 (de)
JP (1) JP5081568B2 (de)
KR (1) KR20080035995A (de)
CN (1) CN101165782A (de)
SG (1) SG142225A1 (de)
TW (1) TW200837730A (de)

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US20110051286A1 (en) * 2009-09-01 2011-03-03 Seagate Technology Llc Writing data on alternating magnetic and nonmagnetic stripes of a servo pattern
US20110216438A1 (en) * 2010-03-08 2011-09-08 Gabor Szita Reader-writer offset correction for a disk drive
US8355300B2 (en) 2010-10-05 2013-01-15 Hitachi Global Storage Technologies Netherlands B.V. Thermally-assisted recording (TAR) patterned-media disk drive with optical detection of write synchronization and servo fields
US8693127B2 (en) 2011-01-27 2014-04-08 International Business Machines Corporation Writing timing-based servo patterns in perpendicular and non-oriented magnetic media
US8995073B1 (en) 2013-03-14 2015-03-31 Seagate Technology Llc Data storage mediums and devices having bit patterned media
US8737002B1 (en) 2013-03-26 2014-05-27 HGST Netherlands B.V. Magnetic recording disk with patterned nondata islands with different sizes and opposite polarity and method for making the disk
EP2863566B1 (de) 2013-10-18 2020-09-02 Université de Nantes Verfahren zur Rekonstruktion eines Datenblocks und Vorrichtung zur Verwendung davon
US9373349B1 (en) * 2015-05-29 2016-06-21 Seagate Technology Llc Relaxing media design constraints with two-dimensional magnetic recording

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Also Published As

Publication number Publication date
EP1914730A3 (de) 2009-01-07
US20100172048A1 (en) 2010-07-08
US20080094742A1 (en) 2008-04-24
US8189282B2 (en) 2012-05-29
JP2008103070A (ja) 2008-05-01
US7715137B2 (en) 2010-05-11
KR20080035995A (ko) 2008-04-24
JP5081568B2 (ja) 2012-11-28
CN101165782A (zh) 2008-04-23
EP1914730A2 (de) 2008-04-23
TW200837730A (en) 2008-09-16

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