Match Document Document Title
9019653 High density timing based servo format for use with tilted transducer arrays  
A product, according to one embodiment, includes a magnetic recording tape having opposite ends, a longitudinal axis of the magnetic recording tape being defined between the ends. The magnetic...
9013827 Coarse actuator positioning algorithm  
Various embodiments include positioning a coarse actuator based, at least in part on lateral motion of a magnetic tape. In one general embodiment, a method includes receiving a value (IntegRevAve)...
9013826 Tape dimension compensation  
In response to determining that a first write operation is to be performed on a portion of tape, writing data to a data track with a tape head element spacing at a nominal value. A tape width of...
9007709 Optimum tape layout selection for improved error correction capability  
According to one embodiment, a system for selecting an optimum tape layout to store data on a tape medium may include a processor and logic integrated with and/or executable by the processor, the...
9001455 Magnetic recording medium, servo signal recording apparatus and method of producing magnetic recording medium  
There is provided a magnetic recording medium including a magnetic layer. The magnetic layer has a servo signal recorded thereon by magnetizing a part of the magnetic layer in a first direction....
8988817 Tape storage medium  
A tape storage medium comprises at least one data band and the data band comprises a set of data sub-bands adjacent to each other. Each data sub-band contains a set of data tracks along a...
8982493 Closed loop control of tape media positioning within tape drive using position error signal feedback  
A control system for a tape drive that uses position error signals (PESs) generated by a tape head assembly of the tape drive during longitudinal movement of a tape through the drive to...
8982500 Controlling the transport of a tape within a tape transport system  
A control device for controlling tape transport within a tape transport system is disclosed. The control device includes a determination unit, which includes at least a first servo channel and a...
8976479 Writing data to tape storage medium  
A method for writing data to a tape storage medium includes: writing first user data to a first physical region (11) of the tape storage medium (1) in a first write mode, writing second user data...
8976482 Servo control  
A tape head includes a set of one or more segments, wherein each segment of the set is individually movable with respect to a frame; each segment of the set comprising at least one of a write...
8958170 Management of tape drive quality using discrete fourier transform analysis  
Embodiments of the present disclosure relates to a method, system, and computer program product for determining an error contribution from a roller bearing in a tape drive. The method includes...
8953268 Methods for formatting and using linear recording media having a reduced servo band width  
Methods for formatting and using a linear magnetic recording medium. The medium in one embodiment has a servo band having a width b that is less than or equal to about 1.2 B/N, where N is an...
8941940 Utilizing stored write environment conditions for read error recovery  
Described herein are embodiments for utilizing stored write environment conditions for read error recovery. A tape drive measures read environment conditions as a result of receiving a read...
8937786 Tape servo track write compensation  
Setting a servo write head spacing for writing servo tracks on a magnetic tape in a manufacturing environment. One or more processors receive one or more environmental condition measurements of...
8929014 Tape header protection scheme for use in a tape storage subsystem  
In one embodiment, a system for integrating data and header protection in tape recording includes a processor and logic adapted to: provide a data array organized in rows and columns, each row of...
8913340 Systems and methods for writing servo patterns  
A method for writing a servo track according to one embodiment comprises monitoring a lateral position of a magnetic tape passing over a servo writing head during a servo track writing operation;...
8902531 Dynamically controlling tape velocity  
A maximum velocity is dynamically determined during a tape drive operation to obtain a statistical standard deviation of a position error signal (PES) that yields an amount of stopwrite (SW)...
8902537 High density timing based servo format  
A product having a magnetic recording tape with at least one servo track, the at least one servo track having a plurality of first magnetic bars and a plurality of second magnetic bars. The first...
8896948 Customizing a range of acceptable tape dimensional stability write conditions  
Described are embodiments of an invention for customizing the range of acceptable write conditions to a tape of a tape cartridge that contracts or expands laterally based on environmental...
8896960 Timing-based servo for determining lateral head velocity  
A servo track has servo pattern frames including two pairs of parallel transitions, the transitions of each pair spaced apart an equal distance, the first pair at an azimuth angle, the second pair...
8891198 Method and apparatus for operating a tape storage device  
In a method for operating a tape storage device comprising a tape head for reading and/or writing data from/to a tape in the tape storage device, a first tape skew value concerning a skew of the...
8891197 Adjustment of tape writing mechanism, based on tape dimensional stability and positional error signal distribution  
A determination is made in a tape drive of a potential deviation in tape dimensional stability of a tape, based on a current environmental condition and environmental conditions in which the tape...
8891199 Robust metric computation of longitudinal position (LPOS) data symbol detection  
An apparatus according to one embodiment includes a digital correlator configured to compute a correlation signal between a sequence of samples of a readback servo signal and a reference waveform....
8879195 Logical block protection for tape interchange  
A two part process is used for modifying records to be written and retrieved from tape devices. A record is appended with a cyclic redundancy check and a string of zeros. Submitting the entire...
8873192 Magnetic tape heads  
Techniques for operating tape heads are provided. In an example, a method includes detecting a potential at a sensor region, determining a target potential using a transfer function, and applying...
8861121 Closed loop control of tape media positioning within tape drive using position error signal feedback  
A control system for a tape drive that uses position error signals (PESs) generated by a tape head assembly of the tape drive during longitudinal movement of a tape through the drive to...
8824083 Calibration system for limiting tape head assembly positioning errors during data writing and reading of tape in tape drive  
Systems and methods (e.g., “utilities”) of measuring errors in the positioning of tape head assembly data write and read elements of a tape drive and utilizing obtained calibration data to...
8817415 Erasure of magnetic storage media having perpendicular anisotropy  
Magnetic storage tape and techniques for erasing and writing to magnetic storage tape having a perpendicular squareness greater than 50 percent and a longitudinal squareness less than 50 percent...
8810956 Technique for optimizing skew in the presence of tape motion  
A method for accurately adjusting skew in the presence of tape motion includes performing a calibration run of magnetic tape in a tape drive. During the calibration run, the method records skew...
8804276 Continuous biasing and servowriting of magnetic storage media having perpendicular anisotropy  
Magnetic storage tape and techniques for erasing and writing to magnetic storage tape having a perpendicular squareness greater than 50 percent and a longitudinal squareness less than 50 percent...
8804262 Compensation for writer crosstalk in a multi-channel tape recording head  
In at least one embodiment, a data storage system is provided. The system includes a controller that is configured to determine a direction of current flow to a first write element to write first...
8797674 Servo mark length matched to write head gap for magnetic storage media  
Magnetic storage tape and techniques for erasing and writing to magnetic storage tape having a perpendicular squareness greater than 50 percent and a longitudinal squareness less than 50 percent...
8797681 Servo write head having plural spaced front blocks coupled by magnetic posts to a back bar  
An assembly comprises a plurality of laterally spaced front blocks, a magnetic post coupling each of the front blocks to a common back bar, and a common front bar magnetically coupled to the back...
8780481 Fast recovery to a write state  
Aspects of the present invention relate to an apparatus and corresponding method that includes transitioning from a monitor state to a stop write state when a determined position error is greater...
8780474 Writing data to tape medium  
In a controller of a tape drive, a CM input-output unit recognizes a tape format; a tape variable acquisition unit acquires tape variables; a setting variable acquisition unit acquires setting...
8780471 Linking errors to particular tapes or particular tape drives  
Techniques to determine particular bad tapes or tape drives. All tape and tape drive combinations within a system may be obtained. A read error or a write error that occurs with each tape and tape...
8773805 Tape media life  
Tape media life is increased by dynamically controlling a turn around point (TAP) on the tape media for either an end of a tape wrap or a directional change from a first longitudinal position tape...
8773800 Adaptive disturbance compensation with multi-rate synchronized sampling  
An apparatus and method for providing adaptive disturbance compensation with multi-rate synchronized sampling is disclosed herein. The dynamic disturbance occurring in a media drive during...
8773810 Adjustable span recording head  
In one general embodiment, a system includes a module having multiple transducers; and a sizing mechanism for actively applying a force to at least one lateral side of the module for selectively...
8767342 Erasure and servowriting of magnetic storage media having perpendicular anistropy  
Magnetic storage tape and techniques for erasing and writing to magnetic storage tape having a perpendicular squareness greater than 50 percent and a longitudinal squareness less than 50 percent...
8760788 System and computer program product for fast recovery to a write state  
In one embodiment, a tape drive system includes a magnetic head having at least one servo sensor for track-following at least one defined servo track of a longitudinal tape, a tape motion...
8760786 Lateral tape motion detector  
A tape edge sensor system for detecting lateral movement of a storage tape includes a first photo-emitter, a first photo-detector positioned to receive a first light signal from the first...
8760795 Linear recording tape with a reduced servo band width, and system and method for using the same  
In one embodiment, a linear magnetic recording tape includes at least one servo band having a servo pattern readable by a servo reader of a magnetic head for positioning thereof, wherein the servo...
8749912 Method and apparatus for bipolar servo marks writing with self DC-erase  
A method and apparatus for bipolar and self DC-erase write of servo marks. The method includes providing a servo write head having first and second write gaps; and applying a varying current to...
8724246 System for fast center calibration of a tape drive for a flangeless tape path  
A servo system according to one embodiment includes a servo control configured to: determine position error between a magnetic head and a desired position related to at least one defined servo...
8711501 Customizing a range of acceptable tape dimensional stability write conditions  
Described are embodiments of an invention for customizing the range of acceptable write conditions to a tape of a tape cartridge that contracts or expands laterally based on environmental...
8705199 Methods, systems and apparatus for reducing the effects of tape dimensional stability  
A method, system, apparatus, and computer readable medium storing instructions for recording data tracks and a method and system for reading data tracks. For recording data tracks, virtual...
8699174 Control system for tape drive to compensate for system disturbances without use of feed-forward sensor  
A tape drive (232) that receives a tape cartridge (42) having a tape (256) comprises a tape head (280) and a control system (270). The tape head (280) transfers data between the tape drive (232)...
8693128 Apparatus and method for writing data to tape medium  
In a controller of a tape drive, a command processing unit receives a request to write new data, an offset determination unit determines whether old data is not partially overwritten with new...
8687314 Methods for fast center calibration of a tape drive for a flangeless tape path  
According to one embodiment, a method includes sensing a first servo sensor while a longitudinal tape is moved in a first direction; determining position error between the magnetic head and a...