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WO2001075874A3 - Measurement of tape position error - Google Patents

Measurement of tape position error

Info

Publication number
WO2001075874A3
WO2001075874A3 PCT/US2001/009557 US0109557W WO2001075874A3 WO 2001075874 A3 WO2001075874 A3 WO 2001075874A3 US 0109557 W US0109557 W US 0109557W WO 2001075874 A3 WO2001075874 A3 WO 2001075874A3
Authority
WO
Grant status
Application
Patent type
Prior art keywords
read
tape
servo
module
error
Prior art date
Application number
PCT/US2001/009557
Other languages
French (fr)
Other versions
WO2001075874A2 (en )
Inventor
Steven G Trabert
John P Mantey
Original Assignee
Storage Technology 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

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition 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
    • G11B5/58Disposition 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
    • G11B5/584Disposition 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 tapes

Abstract

Positioning of a tape head relative to a magnetic tape may be improved through accurate measuring of magnetic tape position error. The tape head includes at least one read module having two servo read elements. A head control detects the presence of corresponding synchronization fields passing the servo read elements. The elapsed time between the detected synchronization fields is determined. Tape skew is calculated based on the elapsed time Tape position error calculation may be further improved by including another servo read element on either a second read module or a write module. Tracking information read from two servo read elements scanning the same servo stripe is used to calculate the offset between a read module and the write module.
PCT/US2001/009557 2000-03-30 2001-03-23 Measurement of tape position error WO2001075874A3 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US09539913 US6430008B1 (en) 2000-03-30 2000-03-30 Measurement of tape position error
US09/539,913 2000-03-30

Publications (2)

Publication Number Publication Date
WO2001075874A2 true WO2001075874A2 (en) 2001-10-11
WO2001075874A3 true true WO2001075874A3 (en) 2002-01-03

Family

ID=24153165

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/009557 WO2001075874A3 (en) 2000-03-30 2001-03-23 Measurement of tape position error

Country Status (2)

Country Link
US (1) US6430008B1 (en)
WO (1) WO2001075874A3 (en)

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US7171560B2 (en) 1998-06-22 2007-01-30 Semtek Solutions, Inc. Method and apparatus for securing and authenticating encoded data and documents containing such data
US6700729B1 (en) * 2000-10-17 2004-03-02 Hewlett-Packard Development Company Alignment marks for tape head positioning
US6768606B2 (en) * 2000-12-12 2004-07-27 Storage Technology Corporation Track position error determination
US6856484B2 (en) * 2001-09-05 2005-02-15 Quantum Corporation Magnetic servo of a recording head
US6906888B1 (en) * 2002-05-20 2005-06-14 Storage Technology Corporation Method for write track placement correction
US6937425B2 (en) * 2003-06-18 2005-08-30 Hewlett-Packard Development Company, L.P. Head-track alignment
US6942312B2 (en) * 2003-07-16 2005-09-13 Hewlett-Packard Development Company, L.P. Method and apparatus related to informative data associated with graphical image data
US7506812B2 (en) 2004-09-07 2009-03-24 Semtek Innovative Solutions Corporation Transparently securing data for transmission on financial networks
US7436621B2 (en) * 2006-06-08 2008-10-14 Quantum Corporation Azimuth compensation using combination bump pes detection
US20080068750A1 (en) * 2006-09-19 2008-03-20 International Business Machines Corporation Planar Write Module And Hybrid Planar Write-Vertical Read Bidirectional Tape Head
US20080068752A1 (en) * 2006-09-19 2008-03-20 International Business Machines Corporation Planar Bidirectional Tape Head With Planar Read And Write Elements
US7978429B2 (en) * 2006-09-19 2011-07-12 International Business Machines Corporation Low track pitch write module and bidirectional tape head
US8769275B2 (en) 2006-10-17 2014-07-01 Verifone, Inc. Batch settlement transactions system and method
US9123042B2 (en) * 2006-10-17 2015-09-01 Verifone, Inc. Pin block replacement
US20080288403A1 (en) * 2007-05-18 2008-11-20 Clay Von Mueller Pin encryption device security
US8355982B2 (en) 2007-08-16 2013-01-15 Verifone, Inc. Metrics systems and methods for token transactions
US7706101B2 (en) * 2007-12-04 2010-04-27 Sun Microsystems, Inc. Transducer positioning assembly
US7724466B2 (en) * 2008-02-25 2010-05-25 International Business Machines Corporation Method and system for servo stripe width detection and compensation
US7660069B2 (en) * 2008-04-29 2010-02-09 Sun Microsystems, Inc. Technique for signal and transducer alignment in a tape drive
US9361617B2 (en) 2008-06-17 2016-06-07 Verifone, Inc. Variable-length cipher system and method
EP2301029A2 (en) * 2008-06-18 2011-03-30 International Business Machines Corporation Servo control in tape drives
US8144940B2 (en) 2008-08-07 2012-03-27 Clay Von Mueller System and method for authentication of data
US8251283B1 (en) 2009-05-08 2012-08-28 Oberon Labs, LLC Token authentication using spatial characteristics
US7948706B2 (en) * 2009-06-10 2011-05-24 International Business Machines Corporation Apparatus and method to adjust the orientation of a read head to correct for dynamic skew
DE112010004916T5 (en) * 2009-12-21 2012-10-25 International Business Machines Corporation Method and apparatus for operating a memory unit
CN102725792B (en) * 2010-01-28 2015-04-08 国际商业机器公司 Method and apparatus for operating a storage device
US7957088B1 (en) * 2010-03-02 2011-06-07 International Business Machines Corporation Track compensation and skew compensation for drives having flangeless rollers and systems thereof
US7961421B1 (en) * 2010-03-02 2011-06-14 International Business Machines Corporation Servo band identification and initial skew estimation in drives having flangeless rollers and systems thereof
WO2013046067A1 (en) * 2011-09-29 2013-04-04 International Business Machines Corporation Servo control
GB201207338D0 (en) * 2012-04-27 2012-06-13 Ibm Method and apparatus for operating a tape storage device
US8638523B2 (en) * 2012-07-02 2014-01-28 International Business Machines Corporation Enabling partial write during a tape skew
GB201213366D0 (en) 2012-07-27 2012-09-12 Ibm Method and apparatus for operating a tape storage device
US8824083B1 (en) * 2013-07-31 2014-09-02 Oracle International Corporation Calibration system for limiting tape head assembly positioning errors during data writing and reading of tape in tape drive
GB201406870D0 (en) 2014-04-16 2014-05-28 Ibm Method and apparatus for operating a tape storage device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3678220A (en) * 1971-05-26 1972-07-18 Ibm Angulated positioning marks for moving web
US4258398A (en) * 1979-10-12 1981-03-24 Eastman Kodak Company Apparatus for preventing flutter and skew in electrical signals
US4392163A (en) * 1979-09-28 1983-07-05 U.S. Philips Corporation Magnetic tape recording and/or reproducing apparatus with automatic head positioning
US4506309A (en) * 1982-12-17 1985-03-19 Pericomp Corporation Tape drive calibration meter
EP0420374A2 (en) * 1989-09-27 1991-04-03 Archive Corporation Method to compensate for tape slope and head azimuth errors

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5898533A (en) 1997-02-21 1999-04-27 Storage Technology Corporation Tape servo pattern with embedded servo track number identification
US5973869A (en) 1997-02-21 1999-10-26 Storage Technology Corporation Servo frame edge detection for tape servo pattern with synchronization field

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3678220A (en) * 1971-05-26 1972-07-18 Ibm Angulated positioning marks for moving web
US4392163A (en) * 1979-09-28 1983-07-05 U.S. Philips Corporation Magnetic tape recording and/or reproducing apparatus with automatic head positioning
US4258398A (en) * 1979-10-12 1981-03-24 Eastman Kodak Company Apparatus for preventing flutter and skew in electrical signals
US4506309A (en) * 1982-12-17 1985-03-19 Pericomp Corporation Tape drive calibration meter
EP0420374A2 (en) * 1989-09-27 1991-04-03 Archive Corporation Method to compensate for tape slope and head azimuth errors

Also Published As

Publication number Publication date Type
US6430008B1 (en) 2002-08-06 grant
WO2001075874A2 (en) 2001-10-11 application

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