WO2000063909A1 - Accumulating read channel performance data - Google Patents
Accumulating read channel performance data Download PDFInfo
- Publication number
- WO2000063909A1 WO2000063909A1 PCT/US2000/010997 US0010997W WO0063909A1 WO 2000063909 A1 WO2000063909 A1 WO 2000063909A1 US 0010997 W US0010997 W US 0010997W WO 0063909 A1 WO0063909 A1 WO 0063909A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- data
- performance data
- sectors
- magnetic medium
- signal
- Prior art date
Links
- 238000012360 testing method Methods 0.000 claims abstract description 54
- 238000000034 method Methods 0.000 claims abstract description 27
- 238000005259 measurement Methods 0.000 claims description 28
- 238000009825 accumulation Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 7
- 238000000605 extraction Methods 0.000 description 4
- 238000011056 performance test Methods 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 4
- 230000007704 transition Effects 0.000 description 3
- 239000000284 extract Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000007619 statistical method Methods 0.000 description 2
- 238000005211 surface analysis Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000012549 training Methods 0.000 description 2
- 101000630267 Homo sapiens Probable glutamate-tRNA ligase, mitochondrial Proteins 0.000 description 1
- 238000007476 Maximum Likelihood Methods 0.000 description 1
- 102100026125 Probable glutamate-tRNA ligase, mitochondrial Human genes 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000003864 performance function Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
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
- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
-
- 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
- G11B20/10055—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter using partial response filtering when writing the signal to the medium or reading it therefrom
-
- 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
- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
- G11B20/1816—Testing
- G11B20/182—Testing using test patterns
-
- 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
- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
- G11B20/1879—Direct read-after-write methods
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/36—Monitoring, i.e. supervising the progress of recording or reproducing
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Digital Magnetic Recording (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00923600A EP1171881A1 (en) | 1999-04-20 | 2000-04-20 | Accumulating read channel performance data |
KR1020017013361A KR20020006706A (en) | 1999-04-20 | 2000-04-20 | Accumulating read channel performance data |
JP2000612952A JP2003524854A (en) | 1999-04-20 | 2000-04-20 | Accumulate read channel performance data |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13016299P | 1999-04-20 | 1999-04-20 | |
US60/130,162 | 1999-04-20 | ||
US09/550,440 | 2000-04-17 | ||
US09/550,440 US6636372B1 (en) | 1999-04-20 | 2000-04-17 | Accumulating read channel performance data |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000063909A1 true WO2000063909A1 (en) | 2000-10-26 |
Family
ID=26828222
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2000/010997 WO2000063909A1 (en) | 1999-04-20 | 2000-04-20 | Accumulating read channel performance data |
Country Status (6)
Country | Link |
---|---|
US (1) | US6636372B1 (en) |
EP (1) | EP1171881A1 (en) |
JP (1) | JP2003524854A (en) |
KR (1) | KR20020006706A (en) |
CN (1) | CN1355921A (en) |
WO (1) | WO2000063909A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002097811A1 (en) * | 2001-05-25 | 2002-12-05 | Infineon Technologies Ag | Dac feedback inside analog front circuit |
WO2003003366A1 (en) * | 2001-06-29 | 2003-01-09 | Infineon Technologies Ag | Total error multiplier for optimizing read/write channel |
WO2003030168A1 (en) * | 2001-10-02 | 2003-04-10 | Seagate Technology Llc | Method and apparatus for detecting media defects |
SG106645A1 (en) * | 2001-04-26 | 2004-10-29 | Seagate Technology Llc | User data wedge media certification in a disc drive data handling system |
WO2007133907A3 (en) * | 2006-05-01 | 2008-02-21 | Scientific Atlanta | Field qualification of disk drives in consumer electronics devices |
WO2007130834A3 (en) * | 2006-05-01 | 2008-02-21 | Scientific Atlanta | Performance testing of disk drives in consumer electronics devices |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7136889B1 (en) | 2000-08-29 | 2006-11-14 | Maxtor Corporation | Method and apparatus for generating high quality real random numbers using a disk drive |
US6937650B2 (en) * | 2001-05-21 | 2005-08-30 | Hitachi Global Storage Technologies Netherlands B.V. | Method and apparatus for channel equalization with a digital FIR filter using a pseudo random sequence |
US6891361B2 (en) * | 2002-12-31 | 2005-05-10 | Lsi Logic Corporation | Automatic gain control (AGC) loop for characterizing continuous-time or discrete-time circuitry gain response across frequency |
US7139900B2 (en) * | 2003-06-23 | 2006-11-21 | Intel Corporation | Data packet arithmetic logic devices and methods |
US7558012B2 (en) * | 2004-05-28 | 2009-07-07 | Hitachi Global Storage Technologies Netherlands B.V. | Read/write channel embedded on-chip optimization |
US7170704B2 (en) * | 2004-06-25 | 2007-01-30 | Stmicroelectronics, Inc. | Enhanced dibit extraction |
US7583459B1 (en) | 2004-11-18 | 2009-09-01 | Marvell International Ltd. | Method and apparatus for write precompensation in a magnetic recording system |
US7245444B2 (en) * | 2005-03-31 | 2007-07-17 | Hitachi Global Storage Technologies Netherlands B.V. | Method and apparatus for providing a read channel having imbedded channel signal analysis |
US7428116B2 (en) * | 2005-05-05 | 2008-09-23 | International Business Machines Corporation | Method for a cyclic dibit response estimation in a media system using a data set separator sequence |
US7493234B2 (en) * | 2005-05-10 | 2009-02-17 | International Business Machines Corporation | Monitoring and reporting normalized device system performance |
US7460323B2 (en) * | 2005-07-29 | 2008-12-02 | Hitachi Global Storage Technologies Netherlands B.V. | Methods and systems for automatically characterizing non-linearities of a read-back signal of a recording system |
US7643238B2 (en) * | 2005-08-29 | 2010-01-05 | Broadcom Corporation | Dibit extraction |
US8174779B2 (en) | 2006-10-31 | 2012-05-08 | Hitachi Global Storage Technologies, Netherlands B.V. | Discrete device testing |
US7852596B2 (en) * | 2009-02-25 | 2010-12-14 | Western Digital Technologies, Inc. | Disk drive returning dummy data to a host when reading an unwritten data sector |
KR101924906B1 (en) * | 2017-07-17 | 2019-02-27 | 전자부품연구원 | Appratus and method for controlling gain |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5068754A (en) * | 1989-11-22 | 1991-11-26 | Seagate Technology, Inc. | Method and apparatus for measuring bit shift |
US5490091A (en) * | 1994-03-01 | 1996-02-06 | Guzik Technical Enterprises, Inc. | Histograms of processed noise samples for measuring error rate of a PRML data detection channel |
US5583705A (en) * | 1994-10-04 | 1996-12-10 | Quantum Corporation | Write precompensation optimization in a PRML channel using a selected PRML signal level |
US5666237A (en) * | 1995-05-19 | 1997-09-09 | Quantum Corporation | Method for mapping thermal asperities of a magnetic recording surface in data storage device |
US5754353A (en) * | 1993-07-01 | 1998-05-19 | Cirrus Logic, Inc. | Channel quality circuit in a sampled amplitude read channel |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5392295A (en) | 1992-07-30 | 1995-02-21 | International Business Machines Corporation | Error measurement circuit |
US5424881A (en) | 1993-02-01 | 1995-06-13 | Cirrus Logic, Inc. | Synchronous read channel |
US5761212A (en) | 1993-07-01 | 1998-06-02 | Cirrus Logic, Inc. | Channel quality |
US5563746A (en) * | 1994-11-17 | 1996-10-08 | Cirrus Logic, Inc. | Real time media defect scanning in a sampled amplitude read channel |
US5987634A (en) | 1994-11-17 | 1999-11-16 | Cirrus Logic, Inc. | Channel quality circuit in a sampled amplitude read channel |
US6016463A (en) | 1996-08-26 | 2000-01-18 | Texas Instruments Incorporated | Channel quality monitor for read channel IC |
US6014768A (en) | 1997-02-04 | 2000-01-11 | Texas Instruments Incorporated | Moving reference channel quality monitor for read channels |
-
2000
- 2000-04-17 US US09/550,440 patent/US6636372B1/en not_active Expired - Lifetime
- 2000-04-20 CN CN00808915A patent/CN1355921A/en active Pending
- 2000-04-20 WO PCT/US2000/010997 patent/WO2000063909A1/en not_active Application Discontinuation
- 2000-04-20 KR KR1020017013361A patent/KR20020006706A/en not_active Application Discontinuation
- 2000-04-20 EP EP00923600A patent/EP1171881A1/en not_active Withdrawn
- 2000-04-20 JP JP2000612952A patent/JP2003524854A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5068754A (en) * | 1989-11-22 | 1991-11-26 | Seagate Technology, Inc. | Method and apparatus for measuring bit shift |
US5754353A (en) * | 1993-07-01 | 1998-05-19 | Cirrus Logic, Inc. | Channel quality circuit in a sampled amplitude read channel |
US5490091A (en) * | 1994-03-01 | 1996-02-06 | Guzik Technical Enterprises, Inc. | Histograms of processed noise samples for measuring error rate of a PRML data detection channel |
US5583705A (en) * | 1994-10-04 | 1996-12-10 | Quantum Corporation | Write precompensation optimization in a PRML channel using a selected PRML signal level |
US5666237A (en) * | 1995-05-19 | 1997-09-09 | Quantum Corporation | Method for mapping thermal asperities of a magnetic recording surface in data storage device |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SG106645A1 (en) * | 2001-04-26 | 2004-10-29 | Seagate Technology Llc | User data wedge media certification in a disc drive data handling system |
WO2002097811A1 (en) * | 2001-05-25 | 2002-12-05 | Infineon Technologies Ag | Dac feedback inside analog front circuit |
WO2003003366A1 (en) * | 2001-06-29 | 2003-01-09 | Infineon Technologies Ag | Total error multiplier for optimizing read/write channel |
WO2003030168A1 (en) * | 2001-10-02 | 2003-04-10 | Seagate Technology Llc | Method and apparatus for detecting media defects |
WO2007133907A3 (en) * | 2006-05-01 | 2008-02-21 | Scientific Atlanta | Field qualification of disk drives in consumer electronics devices |
WO2007130834A3 (en) * | 2006-05-01 | 2008-02-21 | Scientific Atlanta | Performance testing of disk drives in consumer electronics devices |
US7877538B2 (en) | 2006-05-01 | 2011-01-25 | Edwin Jeon | Testing data transfer time of disk drives in consumer electronics devices |
US7895389B2 (en) | 2006-05-01 | 2011-02-22 | Edwin Jeon | Measuring data transfer time for disk drives |
US7937737B2 (en) | 2006-05-01 | 2011-05-03 | Russ Samuel H | Field qualification of disk drives in consumer electronics devices |
Also Published As
Publication number | Publication date |
---|---|
JP2003524854A (en) | 2003-08-19 |
CN1355921A (en) | 2002-06-26 |
EP1171881A1 (en) | 2002-01-16 |
KR20020006706A (en) | 2002-01-24 |
US6636372B1 (en) | 2003-10-21 |
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