Inventor · disambiguated record
Siri S. Weerasooriya
Also filed as: WEERASOORIYA SIRI S
45 granted patents·4,072 citations·filing 2004–2023
99Inventor score
Top patents by PatentIndex Score
45 records- 0199US7301717B1Servo writing a disk drive by integrating a spiral track read signalWESTERN DIGITAL TECH INC·Filed 2004·Granted Nov 27, 2007·181 cites·14 claims
- 0299US7113362B1Servo writing a disk drive by processing spiral tracks in an interleaved mannerWESTERN DIGITAL TECH INC·Filed 2005·Granted Sep 26, 2006·140 cites·7 claims
- 0399US6965489B1Using an external spiral servo writer to write reference servo sectors and spiral tracks to a disk to facilitate writing product servo sectors to the diskWESTERN DIGITAL TECH INC·Filed 2004·Granted Nov 15, 2005·173 cites·11 claims
- 0498US7852592B1Spiral slope approximation of spiral patterns written to a disk of a disk driveWESTERN DIGITAL TECH INC·Filed 2008·Granted Dec 14, 2010·118 cites·20 claims
- 0598US7843662B1Servoing on concentric servo sectors of a first disk surface to write a spiral servo track to a second disk surfaceWESTERN DIGITAL TECH INC·Filed 2008·Granted Nov 30, 2010·126 cites·20 claims
- 0698US7746592B1Disk drive detecting defective spiral servo trackWESTERN DIGITAL TECH INC·Filed 2009·Granted Jun 29, 2010·113 cites·16 claims
- 0798US7656604B1Disk drive demodulating a spiral track by finding a maximum correlation between a spiral track crossing signal and a time-shifted nominal spiral track crossing signalWESTERN DIGITAL TECH INC·Filed 2007·Granted Feb 2, 2010·125 cites·23 claims
- 0898US7489464B1Servo writing a disk drive using a secondary actuator to control skew angleWESTERN DIGITAL TECH INC·Filed 2005·Granted Feb 10, 2009·120 cites·16 claims
- 0998US7468855B1Servo writing a disk drive from a number of spiral tracks equal to a non-integer multiple of product servo wedgesWESTERN DIGITAL TECH INC·Filed 2007·Granted Dec 23, 2008·118 cites·22 claims
- 1098US7330327B1Servo writing a disk drive by writing discontinuous spiral tracks to prevent overheatingWESTERN DIGITAL TECH INC·Filed 2004·Granted Feb 12, 2008·114 cites·24 claims
- 1198US7248426B1Servo writing a disk drive from spiral tracks by shifting a demodulation window an integer number of sync mark intervalsWESTERN DIGITAL TECH INC·Filed 2004·Granted Jul 24, 2007·142 cites·10 claims
- 1298US7068461B1Servo writing a disk drive by overwriting a harmonic frequency fill pattern in the servo burst areaWESTERN DIGITAL TECH INC·Filed 2004·Granted Jun 27, 2006·140 cites·5 claims
- 1398US7068459B1Adjusting track density by changing PES algorithm when servo writing a disk drive from spiral tracksWESTERN DIGITAL TECH INC·Filed 2004·Granted Jun 27, 2006·175 cites·38 claims
- 1498US6989954B1Demodulating servo sectors and spiral tracks using common circuitryWESTERN DIGITAL TECH INC·Filed 2004·Granted Jan 24, 2006·137 cites·13 claims
- 1598US6987636B1Adjusting track density over disk radius by changing slope of spiral tracks used to servo write a disk driveWESTERN DIGITAL TECH INC·Filed 2004·Granted Jan 17, 2006·167 cites·30 claims
- 1697US8724253B1Disk drive adjusting demodulation window for spiral track using timing feed-forward compensationLIANG JIANGANG·Filed 2012·Granted May 13, 2014·98 cites·26 claims
- 1797US8670206B1Disk drive estimating repeatable runout of reference pattern based on repeatable runout of phase errorLIANG JIANGANG·Filed 2012·Granted Mar 11, 2014·109 cites·16 claims
- 1897US8665551B1Disk drive adjusting gain and offset of BEMF velocity sensor during self writing of spiral tracksRIGNEY BRIAN P·Filed 2011·Granted Mar 4, 2014·108 cites·18 claims
- 1997US8634283B1Disk drive performing in-drive spiral track writingRIGNEY BRIAN P·Filed 2011·Granted Jan 21, 2014·116 cites·16 claims
- 2097US8537486B2Disk drive writing spiral tracks on a slave surface using repeatable runout compensation for a master surfaceLIANG JIANGANG·Filed 2011·Granted Sep 17, 2013·122 cites·16 claims
- 2197US8451697B1Disk drive centering demodulation windows on spiral tracks during a seek operationRIGNEY BRIAN P·Filed 2011·Granted May 28, 2013·112 cites·16 claims
- 2297US7839591B1Disk drive comprising index spiral track identified by change in sync markWESTERN DIGITAL TECH INC·Filed 2008·Granted Nov 23, 2010·124 cites·25 claims
- 2397US7688539B1Disk drive self servo writing spiral tracks by propagating burstsWESTERN DIGITAL TECH INC·Filed 2008·Granted Mar 30, 2010·110 cites·22 claims
- 2497US7602575B1Disk drive adjusting estimated reader/writer offset to achieve target burst crossing signal amplitude when propagating servo sectorsWESTERN DIGITAL TECH INC·Filed 2008·Granted Oct 13, 2009·118 cites·20 claims
- 2597US7499236B1Calibrating correlation between PES and off-track displacement by processing high frequency signal in spiral trackWESTERN DIGITAL TECH INC·Filed 2005·Granted Mar 3, 2009·116 cites·16 claims
- 2697US7433143B1Adjusting track density by changing slope of spiral tracks used to servo write a disk driveWESTERN DIGITAL TECH INC·Filed 2004·Granted Oct 7, 2008·125 cites·4 claims
- 2797US7333280B1Servo writing a disk drive by synchronizing a servo write clock to a reference pattern on the disk and compensating for repeatable phase errorWESTERN DIGITAL TECH INC·Filed 2004·Granted Feb 19, 2008·160 cites·16 claims
- 2897US6992852B1Method for reducing disk thermal expansion effects while writing reference spiral servo patterns to a disk of a disk driveWESTERN DIGITAL TECH INC·Filed 2004·Granted Jan 31, 2006·159 cites·15 claims
- 2996US8724245B1Disk drive employing overlapping servo zones to facilitate servo zone crossingSMITH STEVEN C·Filed 2012·Granted May 13, 2014·118 cites·22 claims
- 3096US8699173B1Disk drive detecting touchdown event by evaluating frequency response of a touchdown metricKANG SOO-CHOON·Filed 2011·Granted Apr 15, 2014·99 cites·30 claims
- 3195US8786976B1Disk drive detecting when head is on rampKANG SOO-CHOON·Filed 2011·Granted Jul 22, 2014·51 cites·18 claims
- 3295US8749904B1Disk drive compensating for track squeeze by writing non-circular servo tracksLIANG JIANGANG·Filed 2012·Granted Jun 10, 2014·99 cites·22 claims
- 3389US11615811B2Split actuator drive that limits slew rate of aggressor VCM to reduce victim disturbancesTOSHIBA KK·Filed 2021·Granted Mar 28, 2023·2 cites·14 claims
- 3486US9245560B1Data storage device measuring reader/writer offset by reading spiral track and concentric servo sectorsWESTERN DIGITAL TECH INC·Filed 2015·Granted Jan 26, 2016·8 cites·14 claims
- 3584US9208810B1Data storage device attenuating interference from first spiral track when reading second spiral trackWESTERN DIGITAL TECH INC·Filed 2014·Granted Dec 8, 2015·6 cites·14 claims
- 3684US9076490B1Disk drive writing radial offset spiral servo tracks by reading spiral seed tracksWESTERN DIGITAL TECH INC·Filed 2012·Granted Jul 7, 2015·7 cites·14 claims
- 3780US8982490B1Data storage device reading first spiral track while simultaneously writing second spiral trackWESTERN DIGITAL TECH INC·Filed 2014·Granted Mar 17, 2015·4 cites·14 claims
- 3880US8902535B1Disk drive adapting feed-forward compensation using iterative learning control over segments of seek lengthWESTERN DIGITAL TECH INC·Filed 2012·Granted Dec 2, 2014·5 cites·20 claims
- 3973US8861123B1Disk drive servoing on first disk surface while erasing second disk surfaceWESTERN DIGITAL TECH INC·Filed 2012·Granted Oct 14, 2014·4 cites·20 claims
- 4072US10198188B2Disk drive that efficiently handles random mixed-R/W command-streamsTOSHIBA KK·Filed 2017·Granted Feb 5, 2019·1 cites·18 claims
- 4169US12148456B2Split actuator drive that limits slew rate of aggressor VCM to reduce victim disturbancesTOSHIBA KK·Filed 2023·Granted Nov 19, 2024·0 cites·16 claims
- 4265US9047901B1Disk drive measuring spiral track error by measuring a slope of a spiral track across a disk radiusWESTERN DIGITAL TECH INC·Filed 2013·Granted Jun 2, 2015·1 cites·22 claims
- 4365US8917474B1Disk drive calibrating a velocity profile prior to writing a spiral trackRIGNEY BRIAN P·Filed 2011·Granted Dec 23, 2014·1 cites·18 claims
- 4462US10678442B2Disk drive that efficiently handles random mixed-R/W command-streamsTOSHIBA KK·Filed 2019·Granted Jun 9, 2020·0 cites·12 claims
- 4545US8896957B1Disk drive performing spiral scan of disk surface to detect residual dataWESTERN DIGITAL TECH INC·Filed 2013·Granted Nov 25, 2014·0 cites·22 claims
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