GB0502177D0 - Optimisation of a data read system and a data read/write system - Google Patents

Optimisation of a data read system and a data read/write system

Info

Publication number
GB0502177D0
GB0502177D0 GB0502177A GB0502177A GB0502177D0 GB 0502177 D0 GB0502177 D0 GB 0502177D0 GB 0502177 A GB0502177 A GB 0502177A GB 0502177 A GB0502177 A GB 0502177A GB 0502177 D0 GB0502177 D0 GB 0502177D0
Authority
GB
United Kingdom
Prior art keywords
data read
optimisation
write
write system
data
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
GB0502177A
Other versions
GB2423218A (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hewlett Packard Development Co LP
Original Assignee
Hewlett Packard Development Co LP
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 Hewlett Packard Development Co LP filed Critical Hewlett Packard Development Co LP
Priority to GB0502177A priority Critical patent/GB2423218A/en
Publication of GB0502177D0 publication Critical patent/GB0502177D0/en
Publication of GB2423218A publication Critical patent/GB2423218A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
    • 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
    • G11B20/10009—Improvement or modification of read or write signals
    • 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
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10268—Improvement or modification of read or write signals bit detection or demodulation methods
    • G11B20/10287—Improvement or modification of read or write signals bit detection or demodulation methods using probabilistic methods, e.g. maximum likelihood detectors
    • G11B20/10296—Improvement or modification of read or write signals bit detection or demodulation methods using probabilistic methods, e.g. maximum likelihood detectors using the Viterbi algorithm
    • 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
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10481—Improvement or modification of read or write signals optimisation methods

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Probability & Statistics with Applications (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
GB0502177A 2005-02-03 2005-02-03 Data storage system read/write channel optimiser which compares measured metrics of read channel with desired nominal and adjusts channel in response Withdrawn GB2423218A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0502177A GB2423218A (en) 2005-02-03 2005-02-03 Data storage system read/write channel optimiser which compares measured metrics of read channel with desired nominal and adjusts channel in response

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0502177A GB2423218A (en) 2005-02-03 2005-02-03 Data storage system read/write channel optimiser which compares measured metrics of read channel with desired nominal and adjusts channel in response

Publications (2)

Publication Number Publication Date
GB0502177D0 true GB0502177D0 (en) 2005-03-09
GB2423218A GB2423218A (en) 2006-08-16

Family

ID=34307879

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0502177A Withdrawn GB2423218A (en) 2005-02-03 2005-02-03 Data storage system read/write channel optimiser which compares measured metrics of read channel with desired nominal and adjusts channel in response

Country Status (1)

Country Link
GB (1) GB2423218A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013136339A1 (en) 2012-03-15 2013-09-19 Hewlett-Packard Development Company, L.P. Regulating replication operation
US10592347B2 (en) 2013-05-16 2020-03-17 Hewlett Packard Enterprise Development Lp Selecting a store for deduplicated data
US10496490B2 (en) 2013-05-16 2019-12-03 Hewlett Packard Enterprise Development Lp Selecting a store for deduplicated data

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5274512A (en) * 1989-03-13 1993-12-28 Sony Corporation Coefficient control system for digital equalizer using orthogonal oscillation
JP3517456B2 (en) * 1994-10-04 2004-04-12 キヤノン株式会社 Playback device
EP0831480B1 (en) * 1996-09-24 2001-08-08 Hewlett-Packard Company, A Delaware Corporation Data processing apparatus and methods
US6252731B1 (en) * 1997-10-16 2001-06-26 Seagate Technology Llc Parametric optimization using disc drive read channel quality measurements
WO2000042609A1 (en) * 1999-01-18 2000-07-20 Fujitsu Limited Reproduced signal controlling method and device

Also Published As

Publication number Publication date
GB2423218A (en) 2006-08-16

Similar Documents

Publication Publication Date Title
GB2419979B (en) System and method of reading non-volatile computer memory
TWI349289B (en) Nonvolatile memory system, data read/write method for nonvolatile memory system, data read method for memory system, and data write method for memory system
GB2428120B (en) Memory read requests passing memory writes
GB2430776B (en) System and method of accessing non-volatile computer memory
EP1756803A4 (en) System and method for a universal data write unit
DE602005001354D1 (en) Data recording system
EP1747502A4 (en) Calibration of holographic data storage systems using holographic media calibration features
GB2427491B (en) Systems and methods for gathering data concerning usage of media data
EP1895418A4 (en) Nonvolatile memory device, method of writing data, and method of reading out data
GB0507912D0 (en) Disk drive and method for protecting data writes in a disk drive
EP1922653A4 (en) Word clustering for input data
GB2445245B (en) Memory read/write micro-command scheduler
GB2422923B (en) Diagnosis of a data read system
EG26294A (en) Reading device and reading method for an optical data recording medium
EP1854009A4 (en) Rf tag system with single step read and write commands
TWI318374B (en) Processor and method of indirect register read and write operations
EP1950758A4 (en) Optical information recording medium and method for manufacture thereof
DE602006005734D1 (en) Data recording device and access control method
HK1082161A2 (en) Trade system and apparatus thereof for data reading
EP1826772B1 (en) Magnetic memory device and method of writing data into magnetic memory device
EP2145283A4 (en) Enabling recording and copying data
GB0502177D0 (en) Optimisation of a data read system and a data read/write system
DE602007001015D1 (en) Holographic information recorder and information reproducer
EP1968061A4 (en) Content data recording/reproducing device
EP1883926A4 (en) Hybrid disk and method of writing data to and/or reading data from the hybrid disk

Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)