JPH0439864U - - Google Patents
Info
- Publication number
- JPH0439864U JPH0439864U JP1990080942U JP8094290U JPH0439864U JP H0439864 U JPH0439864 U JP H0439864U JP 1990080942 U JP1990080942 U JP 1990080942U JP 8094290 U JP8094290 U JP 8094290U JP H0439864 U JPH0439864 U JP H0439864U
- Authority
- JP
- Japan
- Prior art keywords
- magnetic disk
- maximum value
- track
- change rate
- reproduced
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims description 5
- 238000007689 inspection Methods 0.000 claims description 5
- 238000005070 sampling Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 2
- 239000013256 coordination polymer Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
- G11B33/10—Indicating arrangements; Warning arrangements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
- G01R33/1207—Testing individual magnetic storage devices, e.g. records carriers or digital storage elements
-
- 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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/02—Control of operating function, e.g. switching from recording to reproducing
- G11B19/12—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark
-
- 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
- G11B5/012—Recording on, or reproducing or erasing from, magnetic disks
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S5/00—Beds
- Y10S5/904—Beds with sound emitting means
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Manufacturing Of Magnetic Record Carriers (AREA)
- Digital Magnetic Recording (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1990080942U JPH0439864U (US06633600-20031014-M00021.png) | 1990-07-30 | 1990-07-30 | |
US07/731,744 US5256965A (en) | 1990-07-30 | 1991-07-16 | Quality inspecting method and apparatus for detecting defects in magnetic disks by dividing a plurality of concentric tracks into numbered sectors |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1990080942U JPH0439864U (US06633600-20031014-M00021.png) | 1990-07-30 | 1990-07-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0439864U true JPH0439864U (US06633600-20031014-M00021.png) | 1992-04-03 |
Family
ID=13732545
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1990080942U Pending JPH0439864U (US06633600-20031014-M00021.png) | 1990-07-30 | 1990-07-30 |
Country Status (2)
Country | Link |
---|---|
US (1) | US5256965A (US06633600-20031014-M00021.png) |
JP (1) | JPH0439864U (US06633600-20031014-M00021.png) |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5434838A (en) * | 1991-12-05 | 1995-07-18 | Fuji Photo Film Co., Ltd. | Data recording apparatus and method with verification of optical disc |
WO1994011864A1 (en) * | 1992-11-10 | 1994-05-26 | Hardisk Technology | Self-servowriting disk drive and method |
US5943632A (en) * | 1995-08-30 | 1999-08-24 | Oilfield Equipment Marketing, Inc. | Method and apparatus for detecting and displaying irregularities in ferrous pipe |
CA2246356A1 (en) * | 1996-02-13 | 1997-08-21 | G.D. Searle & Co. | Compositions comprising a cyclooxygenase-2 inhibitor and a leukotriene b4 receptor antagonist |
US5792947A (en) * | 1996-04-18 | 1998-08-11 | Phase Metrics | Method and apparatus for combined glide and defect analysis |
US5875064A (en) | 1996-07-09 | 1999-02-23 | International Business Machines Corporation | Method and system for accurate self-servowriting with normalization in a disk drive |
US5838510A (en) * | 1996-10-31 | 1998-11-17 | Phase Metrics, Inc. | Method and apparatus for the measurement of defects in magnetic recording disks using a logarithmic amplifier |
KR100215745B1 (ko) | 1996-12-19 | 1999-08-16 | 구자홍 | 씨디 품질 검사방법 |
US6058086A (en) * | 1996-12-19 | 2000-05-02 | Lg Electronics, Inc. | Method and apparatus for testing quality of an optical disk medium |
KR100285315B1 (ko) | 1997-09-24 | 2001-04-02 | 구자홍 | 광디스크 품질검사 방법 및 장치 |
US6529460B1 (en) * | 1998-01-31 | 2003-03-04 | Seagate Technology Llc | Detection of pulse peak instance and amplitude in a storage drive |
US6157189A (en) * | 1998-03-23 | 2000-12-05 | Intevac, Inc. | Magnetic read/write of reference track in contact start-stop testing of magnetic disks |
US6092412A (en) * | 1998-05-05 | 2000-07-25 | International Business Machines Corporation | Glide height test signal processor and method using increased high frequency components |
US6411459B1 (en) | 1999-02-22 | 2002-06-25 | Seagate Technology Llc | Advanced servo writing method for hard disc drives |
JP3546351B2 (ja) * | 1999-12-22 | 2004-07-28 | 株式会社日立製作所 | 磁気ディスクまたは磁気ヘッドの検査装置 |
WO2002031826A2 (en) | 2000-10-10 | 2002-04-18 | Seagate Technology Llc | Method to measure signal decay and a device therefor |
US6862088B2 (en) * | 2001-12-07 | 2005-03-01 | Zoran Corporation | Method and apparatus for providing adaptive control of track servo |
US7054240B2 (en) * | 2002-03-04 | 2006-05-30 | Zoran Corporation | Method and apparatus for providing focus control on a multi layer disc |
US6989671B2 (en) * | 2003-01-14 | 2006-01-24 | Sae Magnetics (H.K.) Ltd. | Detection of slider-disk interference using a dynamic parametric test |
US7161392B2 (en) * | 2004-06-23 | 2007-01-09 | Teradyne, Inc. | Comparator feedback peak detector |
US20060025390A1 (en) * | 2004-07-28 | 2006-02-02 | Roby Russell R | Treatment of hormone allergy and related symptoms and disorders |
US7397238B2 (en) | 2005-07-28 | 2008-07-08 | Walters William T | Methods and apparatus for inspecting materials |
JP2013205340A (ja) * | 2012-03-29 | 2013-10-07 | Hitachi High-Technologies Corp | ディスク表面検査方法及びその装置 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6446268A (en) * | 1987-08-14 | 1989-02-20 | Nec Corp | Radial modulation inspecting device |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3686682A (en) * | 1970-08-17 | 1972-08-22 | Burroughs Corp | Method and apparatus for testing magnetic disc files |
JPS60108771A (ja) * | 1983-11-18 | 1985-06-14 | Matsushita Electric Ind Co Ltd | 磁気記録媒体の品質検査装置 |
JPS6138476A (ja) * | 1984-07-30 | 1986-02-24 | Nec Corp | 記録媒体欠陥検出装置 |
-
1990
- 1990-07-30 JP JP1990080942U patent/JPH0439864U/ja active Pending
-
1991
- 1991-07-16 US US07/731,744 patent/US5256965A/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6446268A (en) * | 1987-08-14 | 1989-02-20 | Nec Corp | Radial modulation inspecting device |
Also Published As
Publication number | Publication date |
---|---|
US5256965A (en) | 1993-10-26 |
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