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7639448 |
Differential timing based servo pattern for magnetic-based storage media
A magnetic storage media includes a magnetic first-pole polarity initialized servo track segment and a magnetic second-pole polarity differential timing based servo pattern recorded on the magnetic...
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7626778 |
Tape drive apparatus
One embodiment of a tape drive apparatus has a non-volatile memory for storing an identifier. Data that is written by the tape drive apparatus to a loaded tape media is tagged using the identifier....
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7623318 |
Noise reduction in same-gap servo in frequency-based servo tape systems
Noise in a same-gap, frequency-based servo tape system is reduced by applying correlated noise factors, generated during calibration, to filtered data write signals. The resulting noise values are...
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7623310 |
Magnetic recording medium, servo signal write head unit, and servo writer
Disclosed is a magnetic recording medium which enables a magnetic head to be accurately positioned even if higher-density recording of magnetic recording media is reinforced. The magnetic recording...
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7605995 |
Servo writer, signal output control method and manufacturing method of magnetic tape using the signal output control method
A recording current to be supplied to a magnetic head is regulated by a signal output control unit. A peak value (either of positive-going peak value and a negative-going peak value) is detected in...
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7602578 |
Servo writer and servo writing process
A servo writer according to the present invention is a servo writer which writes a servo signal on a servo band of a magnetic tape. It comprises a magnetic tape driving system in which a magnetic...
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7600709 |
Tape tension sensor
A tension sensor within a tape drive for measuring tension of a magnetic tape medium is provided. The tension sensor comprises a guide pin connected to a top plate for guiding the magnetic tape...
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7602579 |
Methods for enabling functionality in multi-modal data storage systems
A method for enabling different modes on a multi-modal data storage system such as a tape-based data storage system includes enabling a data storage system to operate in at least one of two modes,...
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7593177 |
Recording/reproducing method of magnetic tape
In a recording/reproducing method of a magnetic tape in a tracking servo system, a recording density of each data track is increased while inhibiting occurrence of a recording/reproducing error...
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7589927 |
Dynamically adapting a read channel equalizer
Provided is a read channel incorporated in a storage device to process signals read from a storage medium. The read channel includes an equalizer equalizing input read signals to produce equalizer...
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7573665 |
Magnetic tape read channel signal values developed employing intermediate bits of the path memory of a PRML Viterbi detector
Magnetic tape read channel signal values are developed employing intermediate bits of the path memory of a PRML Viterbi detector. Identification logic identifies a most likely path memory state of...
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7573664 |
Integrated multiple channel data reliability testing for a magnetic tape drive
Data reliability testing for a magnetic tape drive is conducted separately for the channels of a magnetic tape drive which write and read tracks of a multiple track magnetic tape. Memory stores...
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7561372 |
System and method for writing data to magnetic tape
A system and method for writing data to a magnetic tape that may provide improved data writing and throughput is provided. First data accumulated in the buffer is written to a temporary recording...
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7558018 |
Head position detector with optical slit pattern
Disclosed are systems and methods for positioning a head. An exemplary system includes a light source; a detector configured to receive signals from the light source; a transducer that reads...
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7551378 |
Tri-state servowriter driver with slow return to zero
A method and apparatus for writing timing-based magnetic servo band patterns on magnetic storage media. The apparatus includes a magnetic head and a tri-state driver. The driver is adapted to...
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7548395 |
Progressive track width head and method
A method according to one embodiment comprises reading servo information from a tape; and positioning a head relative to the tape so that readers in an array are about aligned with selected data...
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7545597 |
Recording/reproducing method of magnetic tape
In a recording/reproducing method of a magnetic tape in a tracking servo system, a recording density of each data track is increased while inhibiting occurrence of a recording/reproducing error...
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7538969 |
Servo pattern with encoded data
Data storage tape comprises one or more data tracks and a servo band. The servo band stores a plurality of servo patterns within a servo frame to facilitate head positioning relative to the data...
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7538966 |
Read/write head azimuth determination via servo band signal information
The present invention, in particular embodiments, provides methods, apparatuses and systems directed to calculating azimuth of a read/write head via signals transduced from a servo read pattern of...
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7535664 |
Performance enhancement for tape write immediate operations
A method for writing data in a tape drive is provided by the present invention. The present invention provides a method for writing data in a tape drive. The invention include allocating a blank...
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7535668 |
Modulated timing based servo pattern strings for magnetic-based storage media
A magnetic storage media has a servo track segment and a timing based servo band recorded on the servo track segment. The timing based servo band includes a modulated timing based servo pattern...
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7529060 |
Read and write head element arrangement
In one embodiment, an arrangement of elements on a head includes a first group of data element spanning a first distance on the head and a second group of data elements spanning a second spanning...
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7529061 |
Tape drive for maintaining lateral position utilizing longitudinally shifted servo pattern with increased sampling rate
A tape drive and a method of using a tape drive is provided. The tape drive includes a head assembly including at least a first and a second servo read element configured to detect transition...
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7522372 |
Servo track having periodic frames of tone field and embedded synchronization marks
Methods and systems for sensing a position of a transducer head with respect to a storage medium. One method includes generating a read signal from a servo track stored on a magnetic storage...
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7515374 |
Magnetic tape and manufacturing method thereof, and servo writer
A magnetic tape is characterized in that a servo signal for performing tracking control of a magnetic head is written on a data band, data is recorded on the data band, and the servo signal is...
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7511907 |
Stepped time based servo pattern and head
The present invention relates to apparatuses and methods used in manufacturing magnetic tape. More specifically, the present invention relates to a method of writing a servo pattern on magnetic...
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7499820 |
Method for generating a performance metric for a tensilized tape
A method for generating an anti-shrink to delta creep amplitude performance metric for a tensilized tape. The method may include the steps of determining a zero point of the tensilized tape,...
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7499235 |
Auto-servo tape system and associated recording head
A recording head comprises a first tape-head contact area including a first write element and a first read element, which itself may include an MR sensor element. The first read element is...
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7495859 |
Interleaved servo pattern
In general, the invention is directed to servo techniques that utilize servo patterns to facilitate head positioning relative to the data tracks. For example, the servo techniques may include a...
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7495861 |
Control apparatus, control method, and computer product for magnetic tape device
A header data storage unit stores therein header data that identifies each file. A header data reader reads the stored header data, from the header data of the first file written to a magnetic tape...
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7486464 |
Ultra high track density adaptive head core track pitch control
Apparatuses and methods for adjusting the track pitches of the tracks on a data storage tape. In one variation, the method comprises adjusting the observed pitch between the tracks by applying...
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7480117 |
High areal density tape head
A tape head designed for transducing data on a magnetic recording tape that is subject to tape dimensional changes. The tape head includes two or more arrays of transducer elements having different...
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7477474 |
Servo writing and decoding position error signal for linear tape drives
The present invention, in particular embodiments, is directed to methods, apparatuses and systems that facilitate recording of servo signals on a recording medium such as magnetic tape with high...
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7466510 |
Distributed servo patterns for data storage media
The invention is directed to a data storage medium that includes a plurality of servo bands distributed across the data storage medium and a plurality of data tracks positioned between each of the...
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7453663 |
Disk drives with servo burst patterns radially offset in different radial spokes of a disk and methods of positioning based thereon
A disk drive includes a rotatable disk, a transducer, an actuator, and a controller. The disk includes a first servo burst pattern in a first radial spoke of the disk, and a second servo burst...
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7450341 |
Intergrated thin film subgap subpole structure for arbitrary gap pattern magnetic recording heads and method of making the same
An arbitrary gap thin film magnetic recording head is fabricated by forming a substrate based on traditional vertical planar thin film head wafer technology which is designed to produce an...
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7443623 |
Peak detection for magnetic tape timing based servo
Selection of servo signals for peak detection of timing based servo tracks of magnetic tape for lateral positioning of heads relative to the magnetic tape. Servo signals from magneto-resistive...
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7436621 |
Azimuth compensation using combination bump pes detection
An example embodiment provides for an apparatus and method, for use in a tape drive system, that supplies tape azimuth error information transduced from servo read elements that are located on...
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7436622 |
Concurrent servo and data track writing
The invention is directed to techniques for storing information on a linear data storage medium, such as magnetic tape. According to the invention, a write head array concurrently writes a...
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7428117 |
Servo signal inspecting device and method for inspecting servo signal
A servo signal inspection device and a method for detecting servo signal are provided which can measure and evaluate quality of the servo signal on a magnetic tape with a sufficient resolution. The...
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7420758 |
Head system, recording and reproduction system, and magnetic recording method
Disclosed is a head system including a plurality of recording heads for azimuth recording. The system includes a first recording head having a plurality of magnetic gaps having a first azimuth...
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7414803 |
Write protected magnetic storage media and associated methods
According to one aspect and example, a method is provided for handling write protected storage devices. The method includes generating a read signal from a portion of a magnetic storage medium and...
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7411759 |
Detection and measurement of position error signal linearity in timing based servo patterns using differential nonlinearity
Systems, computer implemented methodology, and computer readable media for measuring position error signal differential nonlinearity in timing based servo patterns. A set of two or more reading...
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7403350 |
Multiple servo sensor configuration for magnetic tape timing based servo
Multiple servo sensors are laterally displaced over a distance less than the transverse width of timing based servo track laterally extending transitions. The servo sensors are configured to sense...
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7388724 |
Pulse-slimming for a tape servo system using non-linear gain
Pulses generated from servo stripes of a servo tape system are narrowed by using non-linear gain enabling precise position of the read head. Non-linear gain based on the amplitude of each pulse is...
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7379254 |
Mixed frequency amplitude-based servo pattern
The invention is directed to a servo frame that includes servo windows written with different frequencies to provide redundant positioning information. The servo frame includes a set of first servo...
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7379261 |
Apparatus and method for reproducing recorded signal
In an apparatus and a method for reproducing recorded signal related to this invention, a dynamic tracking head having two gaps, which deviate from each other traces a single track. Optimum dynamic...
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7362525 |
PRML based magnetic servo position demodulator
Apparatuses and methods for detecting reference marks on magnetic data storage mediums are described herein. In one variation, the apparatus comprises a magnetic servo position demodulator operable...
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7355805 |
Magnetic tape and method of manufacturing magnetic tape, servo writer, and method of and apparatus for specifying servo band
Data for specifying servo bands SB 1 to SB 5 is embedded in each servo signal S 1 to S 5 that is written on a plurality of servo bands SB 1 to SB 5 formed on a magnetic tape MT.
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7342738 |
Positioning head assembly for data storage system with multiple degrees of freedom
The Invention Provides a Positioning System for a Linear Data Storage Medium, Such as magnetic tape or other data storage medium in which data is stored on parallel data tracks that extend along a...
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