GB1394918A - Digital data copy duplication method and apparatus utilising bit to bit data verification - Google Patents

Digital data copy duplication method and apparatus utilising bit to bit data verification

Info

Publication number
GB1394918A
GB1394918A GB3422173A GB3422173A GB1394918A GB 1394918 A GB1394918 A GB 1394918A GB 3422173 A GB3422173 A GB 3422173A GB 3422173 A GB3422173 A GB 3422173A GB 1394918 A GB1394918 A GB 1394918A
Authority
GB
United Kingdom
Prior art keywords
read
bit
data
slave
master
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.)
Expired
Application number
GB3422173A
Other languages
English (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.)
Unisys Corp
Original Assignee
Burroughs Corp
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 Burroughs Corp filed Critical Burroughs Corp
Priority to IN1893/CAL/1973A priority Critical patent/IN138284B/en
Publication of GB1394918A publication Critical patent/GB1394918A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16—Error detection or correction of the data by redundancy in hardware
    • G06F11/1666—Error detection or correction of the data by redundancy in hardware where the redundant component is memory or memory area
    • G06F11/167—Error detection by comparing the memory output
    • 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
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/86—Re-recording, i.e. transcribing information from one magnetisable record carrier on to one or more similar or dissimilar record carriers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/90—Tape-like record carriers
    • 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
    • G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
    • G11B27/022—Electronic editing of analogue information signals, e.g. audio or video signals
    • G11B27/024—Electronic editing of analogue information signals, e.g. audio or video signals on tapes

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Digital Magnetic Recording (AREA)
GB3422173A 1972-09-18 1973-07-18 Digital data copy duplication method and apparatus utilising bit to bit data verification Expired GB1394918A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
IN1893/CAL/1973A IN138284B (enExample) 1973-07-18 1973-08-16

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00289779A US3805284A (en) 1972-09-18 1972-09-18 Digital data copy duplication method and apparatus utilizing bit to bit data verification

Publications (1)

Publication Number Publication Date
GB1394918A true GB1394918A (en) 1975-05-21

Family

ID=23113054

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3422173A Expired GB1394918A (en) 1972-09-18 1973-07-18 Digital data copy duplication method and apparatus utilising bit to bit data verification

Country Status (4)

Country Link
US (1) US3805284A (enExample)
JP (2) JPS4970544A (enExample)
BE (1) BE804281A (enExample)
GB (1) GB1394918A (enExample)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5217838A (en) * 1975-08-01 1977-02-10 Tetsuro Nishitsuji Manufacturing method of synthetic resin mirror
JPS6047652B2 (ja) * 1978-02-10 1985-10-23 ソニー株式会社 カ−ド貼着する磁気テ−プの記録方法
US4375655A (en) * 1981-01-02 1983-03-01 Memory Control Technology Corporation Universal digital data copying system
US4410917A (en) * 1981-09-14 1983-10-18 Accurate Sound Corporation Method of and apparatus for recording information from a master medium onto a slave medium employing digital techniques
JPS58118009A (ja) * 1981-12-29 1983-07-13 Victor Co Of Japan Ltd デイジタル信号磁気記録再生装置
US4471390A (en) * 1982-06-25 1984-09-11 Dennison Manufacturing Company Flexible diskette data duplication
US4470084A (en) * 1982-07-28 1984-09-04 Cetec Corporation Stabilized bias system for magnetic tape read and write heads
JPS59107409A (ja) * 1982-12-09 1984-06-21 Victor Co Of Japan Ltd デイジタル信号の記録装置
US4628370A (en) * 1983-06-20 1986-12-09 Olympus Optical Co., Ltd. Apparatus for copying magnetic tape
JPH0823969B2 (ja) * 1984-01-11 1996-03-06 キヤノン株式会社 記録確認装置
US4638378A (en) * 1984-06-12 1987-01-20 Arrigo Zanessi Fidelity control during operation of duplicator machines
US4727509A (en) * 1984-06-28 1988-02-23 Information Exchange Systems, Inc. Master/slave system for replicating/formatting flexible magnetic diskettes
US4618897A (en) * 1985-02-11 1986-10-21 Ixi Laboratories, Inc. System for synchronizing plural data storage devices to a common master
GB8504765D0 (en) * 1985-02-25 1985-03-27 Gardner J P Magnetic recordings
US4899230A (en) * 1987-12-22 1990-02-06 Idb Corporation Taped data copying utilizing multiple addressable memories
DE58907743D1 (de) * 1988-07-08 1994-07-07 Tandberg Data A S Oslo Oslo Verfahren und Einrichtung zum Duplizieren des Inhalts von Datenträgern.
US5664094A (en) * 1990-04-03 1997-09-02 Canon Kk Method and apparatus for read-write-verification of data stored on an optical disc and stored in a buffer of an optical disk drive
JP3198550B2 (ja) * 1991-09-03 2001-08-13 ソニー株式会社 圧縮データ記録方法及び圧縮データ記録再生装置
JPH0636473A (ja) * 1992-07-16 1994-02-10 Matsushita Electric Ind Co Ltd 光情報記録装置及びその方法
US5706260A (en) * 1993-03-09 1998-01-06 Sony Corporation Apparatus for and method of synchronously recording signals onto a disk medium by a single head
US5819297A (en) * 1995-09-27 1998-10-06 Emc Corporation Method and apparatus for creating reliably duplicatable tape volumes without copying any padding
JP3189660B2 (ja) 1996-01-30 2001-07-16 ソニー株式会社 信号符号化方法
US6131141A (en) * 1996-11-15 2000-10-10 Intelligent Computer Solutions, Inc. Method of and portable apparatus for determining and utilizing timing parameters for direct duplication of hard disk drives
US7046909B2 (en) 1999-12-03 2006-05-16 Mti Film, Llc System and method for identifying inconsistencies in duplicate digital videos
JP3937878B2 (ja) * 2002-03-06 2007-06-27 日本電気株式会社 磁気テープ装置及びその制御方法並びに磁気テープ装置制御用プログラム
US20080066192A1 (en) * 2006-09-07 2008-03-13 International Business Machines Corporation Keyless copy of encrypted data

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL72748C (enExample) * 1947-11-05
NL157686B (nl) * 1949-12-02 Sulzer Ag Hydrostatische zuigermachine.
US2774056A (en) * 1954-04-12 1956-12-11 Loew S Inc Comparator device
US3012230A (en) * 1957-09-30 1961-12-05 Electronic Eng Co Computer format control buffer
BE633599A (enExample) * 1962-06-20
US3268870A (en) * 1962-06-27 1966-08-23 Control Data Corp System and apparatus for automatic data collection
US3359548A (en) * 1964-03-27 1967-12-19 Ampex Magnetic recording and verifying system
US3345614A (en) * 1965-01-12 1967-10-03 Friden Inc Data translation system
US3368211A (en) * 1965-07-26 1968-02-06 Bell Telephone Labor Inc Verification of nrzi recording
DE1499757C3 (de) * 1966-12-16 1974-02-14 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Schaltungsanordnung zur Regelung der Magnetbandgeschwindigkeit eines oder zweier Magnetbandgeräte
US3551608A (en) * 1967-04-07 1970-12-29 Bell & Howell Co Discrepancy indicator for record duplicating apparatus
US3510857A (en) * 1967-06-16 1970-05-05 J C Kennedy Co Tape recording error check system
US3653011A (en) * 1970-04-15 1972-03-28 Ncr Co Three pole tip read after write transducer

Also Published As

Publication number Publication date
JPS4970544A (enExample) 1974-07-08
BE804281A (fr) 1973-12-17
JPS58179624U (ja) 1983-12-01
JPS6017090Y2 (ja) 1985-05-27
US3805284A (en) 1974-04-16

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee