WO2009153740A3 - Servo control in tape drives - Google Patents
Servo control in tape drives Download PDFInfo
- Publication number
- WO2009153740A3 WO2009153740A3 PCT/IB2009/052577 IB2009052577W WO2009153740A3 WO 2009153740 A3 WO2009153740 A3 WO 2009153740A3 IB 2009052577 W IB2009052577 W IB 2009052577W WO 2009153740 A3 WO2009153740 A3 WO 2009153740A3
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- servo
- tape
- read
- skew
- tension
- Prior art date
Links
Classifications
-
- 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
- G11B5/48—Disposition 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
- G11B5/58—Disposition 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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/02—Control of operating function, e.g. switching from recording to reproducing
- G11B15/05—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container
- G11B15/093—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container by sensing driving condition of record carrier, e.g. travel, tape tension
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
- G11B15/43—Control or regulation of mechanical tension of record carrier, e.g. tape tension
-
- 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
- G11B5/48—Disposition 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
- G11B5/58—Disposition 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
- G11B5/596—Disposition 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 disks
Abstract
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09766277A EP2301029A2 (en) | 2008-06-18 | 2009-06-17 | Servo control in tape drives |
KR1020107028226A KR101397738B1 (en) | 2008-06-18 | 2009-06-17 | Servo control in tape drives |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08104461 | 2008-06-18 | ||
EP08104461.2 | 2008-06-18 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2009153740A2 WO2009153740A2 (en) | 2009-12-23 |
WO2009153740A3 true WO2009153740A3 (en) | 2010-02-25 |
Family
ID=41011917
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2009/052577 WO2009153740A2 (en) | 2008-06-18 | 2009-06-17 | Servo control in tape drives |
Country Status (4)
Country | Link |
---|---|
US (1) | US7876521B2 (en) |
EP (1) | EP2301029A2 (en) |
KR (1) | KR101397738B1 (en) |
WO (1) | WO2009153740A2 (en) |
Families Citing this family (41)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8271857B2 (en) | 2008-05-13 | 2012-09-18 | International Business Machines Corporation | Correcting errors in longitudinal position (LPOS) words |
US8611039B2 (en) * | 2009-04-29 | 2013-12-17 | Hewlett-Packard Development Company, L.P. | Arrangement and processing of longitudinal position information on a data storage medium |
US8094402B2 (en) * | 2010-01-12 | 2012-01-10 | International Business Machines Corporation | Systems and methods for correcting magnetic tape dimensional instability |
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 |
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 |
GB2501521A (en) * | 2012-04-27 | 2013-10-30 | Ibm | Skew compensation in tape storage device |
GB2502579A (en) | 2012-05-31 | 2013-12-04 | Ibm | Tape head with movable read/write segments each having a further read element, and tape with servo patterns |
US8780486B2 (en) | 2012-07-10 | 2014-07-15 | International Business Machines Corporation | Determining a skew error signal (SES) offset used to determine an SES to adjust heads in a drive unit |
US8861121B2 (en) | 2012-10-25 | 2014-10-14 | Oracle International Corporation | Closed loop control of tape media positioning within tape drive using position error signal feedback |
GB2508388A (en) | 2012-11-30 | 2014-06-04 | Ibm | Tape servo pattern |
US9208809B2 (en) | 2013-05-01 | 2015-12-08 | International Business Machines Corporation | Magnetic head and system having offset arrays |
US9449628B2 (en) | 2013-05-01 | 2016-09-20 | International Business Machines Corporation | Quasi-statically oriented, bi-directional tape recording head |
US9129614B2 (en) | 2013-05-01 | 2015-09-08 | International Business Machines Corporation | Magnetic head having canted arrays |
WO2014209257A1 (en) | 2013-06-24 | 2014-12-31 | Hewlett Packard Development Company, L.P. | Tension feedback for tape tension |
US9019653B2 (en) | 2013-08-12 | 2015-04-28 | International Business Machines Corporation | High density timing based servo format for use with tilted transducer arrays |
US8902537B1 (en) | 2013-08-12 | 2014-12-02 | International Business Machines Corporation | High density timing based servo format |
US8797682B1 (en) | 2013-08-21 | 2014-08-05 | International Business Machines Corporation | Quasi-statically tilted magnetic tape head having backward compatibility |
GB2517715A (en) | 2013-08-29 | 2015-03-04 | Ibm | Device and method for controlling the transport of a tape within a tape transport system |
GB2517714A (en) | 2013-08-29 | 2015-03-04 | Ibm | Tape storage system |
US8810957B1 (en) | 2013-09-05 | 2014-08-19 | International Business Machines Corporation | Quasi-statically tilted head having dilated transducer pitch |
US9214164B2 (en) | 2013-09-16 | 2015-12-15 | International Business Machines Corporation | Miniskirt tape head having quasi-statically tilted transducer arrays |
GB2518827A (en) * | 2013-09-30 | 2015-04-08 | Ibm | Reading from a tape storage medium |
US9218838B2 (en) | 2013-12-12 | 2015-12-22 | International Business Machines Corporation | Quasi-statically tilted head having offset reader/writer transducer pairs |
US9007712B1 (en) | 2013-12-16 | 2015-04-14 | International Business Machines Corporation | Backward compatible head for quasi-static tilted reading and/or recording |
US9449637B2 (en) * | 2014-04-11 | 2016-09-20 | International Business Machines Corporation | Reduced reel motor disturbances in a tape drive system |
GB2525222A (en) | 2014-04-16 | 2015-10-21 | Ibm | Method and apparatus for operating a tape storage device |
US9159347B1 (en) * | 2014-06-17 | 2015-10-13 | International Business Machines Corporation | Usage of state information from state-space based track-follow controller |
US9117470B1 (en) | 2014-07-17 | 2015-08-25 | International Business Machines Corporation | Write delay to de-skew data in read while write function for tape storage devices |
US10255942B2 (en) | 2016-08-23 | 2019-04-09 | International Business Machines Corporation | Tape transport control with feedback of velocity and tension |
US9947354B1 (en) * | 2017-03-20 | 2018-04-17 | International Business Machines Corporation | Utilization of multiple writer modules for simultaneously writing two times the number of data tracks in a compact form factor |
US10008226B1 (en) | 2017-06-28 | 2018-06-26 | International Business Machines Corporation | Dynamic head offset selection for tape drive |
US10276204B1 (en) * | 2018-04-24 | 2019-04-30 | International Business Machines Corporation | Behavioral model for dynamic tension compensation |
US10783924B2 (en) | 2018-04-27 | 2020-09-22 | Western Digital Technologies, Inc. | Control head to head spacing using a piezoelectric device |
US11011198B1 (en) | 2019-10-29 | 2021-05-18 | International Business Machines Corporation | Tape-creep detection via frequency domain data |
US10832715B1 (en) * | 2019-10-29 | 2020-11-10 | International Business Machines Corporation | Averaged slope timing-based-servo tape-creep detection |
US10930309B1 (en) | 2019-10-29 | 2021-02-23 | International Business Machines Corporation | Tape-creep detection via trajectory and distortion angles |
US11682423B2 (en) * | 2020-10-01 | 2023-06-20 | International Business Machines Corporation | Servo pattern for skew based tape dimensional stability compensation |
US11145323B1 (en) * | 2020-11-30 | 2021-10-12 | International Business Machines Corporation | Accurate skew determination for magnetic tapes experiencing the effects of tape dimensional instability |
US11922981B2 (en) | 2021-07-26 | 2024-03-05 | Fujifilm Corporation | Magnetic tape device |
US11862195B2 (en) | 2022-02-08 | 2024-01-02 | Western Digital Technologies, Inc. | Multi-channel recording head having servo readers proximate to write transducers and read transducers |
US11935562B2 (en) | 2022-02-24 | 2024-03-19 | Western Digital Technologies, Inc. | Magnetic recording device having redundant servo readers and method for using same |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2938962A (en) * | 1955-07-12 | 1960-05-31 | Konins | Azimuth seeking reproducing head |
WO2001075874A2 (en) * | 2000-03-30 | 2001-10-11 | Storage Technology Corporation | Measurement of tape position error |
GB2362984A (en) * | 2000-03-08 | 2001-12-05 | Hewlett Packard Co | Tape tension measurement |
US6724559B1 (en) * | 2000-03-06 | 2004-04-20 | Fujitsu Limited | Magnetic tape unit |
US20040141250A1 (en) * | 2003-01-22 | 2004-07-22 | International Business Machines Corporation | Servo pattern based tape tension control for tape drives |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB784448A (en) * | 1955-07-06 | 1957-10-09 | Wipac Dev Ltd | Improvements in and relating to flywheel magnetos |
US4062047A (en) | 1976-09-01 | 1977-12-06 | Bell Telephone Laboratories, Incorporated | Apparatus for magnetic tape head alignment |
US6222698B1 (en) * | 1998-05-22 | 2001-04-24 | Hewlett-Packard Company | Magnetic tape dimensional instability compensation by varying recording head azimuth angle |
US6781784B2 (en) * | 2001-04-13 | 2004-08-24 | Storage Technology Corporation | Reading tape with transverse distortion |
JP2005327392A (en) * | 2004-05-14 | 2005-11-24 | Fuji Photo Film Co Ltd | Tape drive |
US7158338B2 (en) * | 2004-05-24 | 2007-01-02 | Quantum Corporation | Servo track having periodic frames of tone field and embedded synchronization marks |
US7436621B2 (en) * | 2006-06-08 | 2008-10-14 | Quantum Corporation | Azimuth compensation using combination bump pes detection |
-
2009
- 2009-06-17 WO PCT/IB2009/052577 patent/WO2009153740A2/en active Application Filing
- 2009-06-17 EP EP09766277A patent/EP2301029A2/en not_active Withdrawn
- 2009-06-17 KR KR1020107028226A patent/KR101397738B1/en active IP Right Grant
- 2009-06-18 US US12/487,252 patent/US7876521B2/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2938962A (en) * | 1955-07-12 | 1960-05-31 | Konins | Azimuth seeking reproducing head |
US6724559B1 (en) * | 2000-03-06 | 2004-04-20 | Fujitsu Limited | Magnetic tape unit |
GB2362984A (en) * | 2000-03-08 | 2001-12-05 | Hewlett Packard Co | Tape tension measurement |
WO2001075874A2 (en) * | 2000-03-30 | 2001-10-11 | Storage Technology Corporation | Measurement of tape position error |
US20040141250A1 (en) * | 2003-01-22 | 2004-07-22 | International Business Machines Corporation | Servo pattern based tape tension control for tape drives |
Also Published As
Publication number | Publication date |
---|---|
WO2009153740A2 (en) | 2009-12-23 |
KR101397738B1 (en) | 2014-05-20 |
KR20110028453A (en) | 2011-03-18 |
US20090316296A1 (en) | 2009-12-24 |
EP2301029A2 (en) | 2011-03-30 |
US7876521B2 (en) | 2011-01-25 |
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