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| Number | Title | Issue Date |
| 8184394 | Transducer head assemblies and modules In one embodiment a transducer head assembly is disclosed having a head module. The head module comprises at least one media bearer element providing a media bearer surface, and a head element block having an array of head elements. The assembly further comprises a ... | 05/22/2012 |
| 8169736 | Method and apparatus to position a head module comprising servo elements and a plurality of data elements A method to position a head module, where the head module comprises at least one servo element and a plurality of data elements, where the servo element and each of the plurality of data elements can detect a servo signal, wherein the method includes moving a sequen... | 05/01/2012 |
| 8139312 | Timing alternative intervals within a timing based servo band An alternative time interval is taken of a timing based servo band to determine lateral position of a servo read head. The servo band is arranged in a sequence bursts with non-parallel servo stripes in sequentially adjacent sub-frames of a linear tape. The timing in... | 03/20/2012 |
| 8139311 | Apparatus, method and program for controlling writing of data by tape recording apparatus A technique for improving the performance of head alignment during reading of data from and writing data to a tape medium. An apparatus controls writing of data by a tape drive that drives a tape medium in both forward and reverse directions to record data. The appa... | 03/20/2012 |
| 8130464 | Method and system for compensating for tape deformation A method for compensating for tape deformation in a tape drive includes determining location of deformation on a tape; processing the tape in a first manner before and after the deformation; and processing the tape proximate the deformation in a second manner differ... | 03/06/2012 |
| 8111477 | Recording medium, recording apparatus, reproducing apparatus, and reproducing method Provided is a recording medium onto which a plurality of tracks that constitute a unit as one unit of signal processing for reproducing data are recorded, each of the plurality of tracks being recorded with at least data and, as a preamble necessary for controlling ... | 02/07/2012 |
| 8094406 | Apparatus and method to adjust the positions of a write element and read element disposed on a read/write head A method to adjust the positions of a write element and read element disposed on a read/write head comprising a first assembly independently moveable along a first axis and comprising a first servo element, a second servo element, and the write element disposed betw... | 01/10/2012 |
| 8094407 | Servomechanism with adjustable predictor filter A digital control system, and in particular a tape drive system having a track-following servomechanism with a predictor (also referred to herein as a predictor filter), is described. In certain embodiments, the servomechanism includes an actuator, a servo channel, ... | 01/10/2012 |
| 8068308 | Servo signal recording apparatus, information recording apparatus, and tracking servo method In the apparatus and method of the invention, a servo signal reproduction unit generates a PES from a servo signal reproduced from a magnetic tape, and a frequency conversion unit performs FFT processing of the PES to generate frequency component information. Then, ... | 11/29/2011 |
| 8059362 | Positioning a coarse actuator of compound actuator tape servo system at midpoint of maximum peaks of lateral tape movement Where a tape is subject to lateral shift excursions from one side of a head to another, a coarse actuator is positioned laterally to enable a fine actuator to follow lateral motion of a longitudinal tape having at least one longitudinal defined servo track. A positi... | 11/15/2011 |
| 8059361 | Position signal processor In one embodiment a tape drive system comprises a reel adapted to engage a tape cartridge, the tape cartridge comprising a tape media having a servo code written along a length of the tape media, a tape head comprising at least one servo element to detect the servo ... | 11/15/2011 |
| 8054576 | Skew actuator to servo track zero reference A servo detection system for detecting servo tracks of a longitudinal tape. In a read/write head, two servo read heads are spaced laterally on a first head module, and a servo read head is on a second head module spaced longitudinally from the first module. A method... | 11/08/2011 |
| 8054575 | Position signal processor In one embodiment a tape drive system comprises a reel adapted to engage a tape cartridge, the tape cartridge comprising a tape media having a servo code written along a length of the tape media, a tape head comprising at least one servo element to detect the servo ... | 11/08/2011 |
| 8027120 | Magnetic tape device and data recording method A magnetic tape device comprises a plurality of magnetic heads for recording or reproducing data to a magnetic tape including a data recording area, a tape running mechanism for making the magnetic tape run on the magnetic heads, and a controller for controlling a r... | 09/27/2011 |
| 8027121 | Positioning coarse servo actuator of tape servo system to allow fine servo actuator to follow tape shift excursions Methods, servo systems, and data storage drives follow the lateral shift excursions of longitudinal tape, for example, from flangeless tape guides. A servo sensor is configured to sense lateral position of a tape head with respect to longitudinal servo tracks of the... | 09/27/2011 |
| 8023223 | Combining information from parallel servo channels A weighted combining scheme exploits information from two servo channels operating in parallel. A timing-based servo module comprises two synchronous servo channels coupled respectively to receive two digital servo signals read from a data tape. Both channels have o... | 09/20/2011 |
| 8004789 | Detection and acquisition of a servo pattern subject to lateral motion A method, a servo system and a tape drive are provided to acquire lock on a servo signal. The servo signals of at least one servo element are monitored to detect a valid servo signal. If a valid servo signal is not detected than the fine actuator is moved in a first... | 08/23/2011 |
| 8000056 | Apparatus and method to rotate a read/write head A method is presented to rotate a read/write head rotatable along a first axis and comprising a first assembly having a first servo element and a second servo element. The method moves a sequential information storage medium adjacent to the read/write head along a s... | 08/16/2011 |
| 8000057 | Combining information from parallel servo channels A weighted combining scheme exploits information from two servo channels operating in parallel. A timing-based servo module comprises two synchronous servo channels coupled respectively to receive two digital servo signals read from a data tape. Both channels have o... | 08/16/2011 |
| 7961423 | Information recording apparatus The information recording apparatus of the present invention includes N servo heads. Servo signals outputted respectively from the servo heads are delayed by a delay circuit such that the peaks of the waveforms of the servo signals coincide with each other. The dela... | 06/14/2011 |
| 7957089 | Servo pattern architecture and method using same to improve LPOS encoding efficiency A sequential data storage medium, such as for example and without limitation a magnetic tape, comprising a sequence of plurality of servo patterns encoded therein, which provide lateral position information and LPOS information. Each servo pattern comprises a first ... | 06/07/2011 |
| 7929243 | Setting edge stress signal in magnetic tape data storage cartridge memory in response to servo detection error signals Methods, magnetic tape data storage drives, data storage systems, and magnetic tape data storage cartridges. A system having at least one magnetic tape data storage drive is configured to handle a magnetic tape cartridge comprising a magnetic tape data storage media... | 04/19/2011 |
| 7920356 | Method and system for providing a longitudinally shifted servo pattern for increased sampling rate A method and a system are provided for writing a plurality of servo bands on magnetic tape. The magnetic tape is moved longitudinally relative to at least one servo write head. The servo write head is positioned to write a plurality of parallel longitudinal servo ba... | 04/05/2011 |
| 7911730 | Magnetic head and tape drive for reading multiple data formats A magnetic head is provided for reading and writing data on a data storage media. A first writer and a first reader write and read data of a first format. A second reader reads data of a second format having different read channels than the first format. A third rea... | 03/22/2011 |
| 7903368 | Tape cartridge having tape media with longitudinally shifted servo pattern for increased sampling rate A magnetic tape cartridge including magnetic tape with servo information is provided. The servo information comprises a plurality of parallel longitudinal servo bands that lie between a plurality of longitudinal data bands. The plurality of servo bands include odd s... | 03/08/2011 |
| 7898763 | Servo pattern architecture to uncouple position error determination from linear position information A sequential data storage medium, such as for example and without limitation a magnetic tape, comprising a plurality of servo patterns encoded in a non-data region, wherein each of said servo patterns comprises a first subframe comprising 10 pulses, a second subfram... | 03/01/2011 |
| 7889454 | 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 plurality of distributed servo bands. The data storage medium compris... | 02/15/2011 |
| 7881008 | Joint specification of servo format and servo reader parameters for tape drive systems A servo pattern, including stripes arranged in servo bursts for use in position error signal (PES) generation, is provided in which a stripe width is narrower than 1.7 μm and in which the stripes are oriented at an azimuth angle which in absolute value is equal to ... | 02/01/2011 |
| 7864487 | Head design for writing servo patterns on magnetic tape A servo write head is provided and is configured to simultaneously write at least two servo patterns in respective servo bands on linear magnetic tape. Centerlines of the servo patterns are substantially uniformly spaced in the lateral direction. In addition, the se... | 01/04/2011 |
| 7852600 | Apparatus and method for reading out data recorded on tape An apparatus and method for reading out data recoded on a tape with a read head is provided. A command processing unit receives a request for reading out old data behind EOD of new data. A channel input/output unit receives, data read out with a read head and a buff... | 12/14/2010 |
| 7852599 | Apparatus, system, and method for tape drive head An apparatus, system, and method are disclosed for a tape drive head. An upper servo element reads an upper servo track conforming to a specified format. A lower servo element reads a lower servo track conforming to the specified format. A mid servo element reads a ... | 12/14/2010 |
| 7839598 | Balanced linkage actuation of tape head In one embodiment, first and second levers of a tape head actuator are balanced using first and second masses carried on first and second sides, respectively, of the first and second levers. The first and second levers are linked with a link member of the first mass... | 11/23/2010 |
| 7839599 | Combining information from parallel servo channels A weighted combining scheme exploits information from two servo channels operating in parallel. A timing-based servo module comprises two synchronous servo channels coupled respectively to receive two digital servo signals read from a data tape. Both channels have o... | 11/23/2010 |
| 7835108 | Data storage tape recertification The invention is directed to techniques for erasing data storage tape for reuse. In an embodiment, an erase head module for erasing data storage tape comprises a set of erase gaps and one or more servo read elements. The set of erase gaps is configured to coincide w... | 11/16/2010 |
| 7826169 | Servo error detection and compensation utilizing virtual data tracking servo methods A method for detecting errors in a servo system of a magnetic storage drive includes writing a plurality of data tracks at a pitch, detecting a position of an edge of at least two of the data tracks under control of a servo system (e.g., an optical or magnetic servo... | 11/02/2010 |
| 7782564 | 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, a first of the modes being different than a second of the modes. In o... | 08/24/2010 |
| 7764460 | Adjusting read heads based on misregistration calculated from servo patterns Provided are a method, storage controller, and tape drive for adjusting read heads based on misregistration calculated from servo patterns. A plurality of first read heads read a plurality of servo patterns on a storage medium. A determination is made from the read ... | 07/27/2010 |
| 7742254 | Servo channel for tape drive systems Provided are techniques for synchronous servo channel for a data tape drive. A servo reader is configured to read servo bursts from a data tape. An anti-aliasing filter is operable to output a bandlimited signal and is coupled to receive a servo channel signal compr... | 06/22/2010 |
| 7738212 | 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 boundary of a first data track recorded on the storage medium is determined. ... | 06/15/2010 |
| 7724466 | Method and system for servo stripe width detection and compensation A method and system for servo stripe width detection and compensation including moving a magnetic tape in a first direction across a magnetic tape head, the magnetic tape having a servo band including a first servo pattern and a second servo pattern, the magnetic ta... | 05/25/2010 |
