Patent application number | Description | Published |
20090021855 | Tape drive position control - 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 code, a drive assembly to induce relative motion between the tape and the tape drive, a servo system to control a rate of relative motion between the tape and the tape drive, wherein the servo system comprises a sampling module to sample servo code from the tape media and the sampling module implements a dithered sampling routine centered around a design sampling frequency. | 01-22-2009 |
20100177433 | 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 code, a drive assembly to induce relative motion between the tape and the tape drive, a servo system to control the lateral and longitudinal motion between the tape and the tape head, the servo system comprising a sampling circuit assembly to sample servo data from the tape media, wherein the sampling circuit assembly samples both positive readback waveforms and negative readback waveforms generated by servo code on the tape, a pulse time demodulator circuit module to generate timestamped, digital signals from signals generated by the sampling circuit assembly, and a position signal processor to calculate a position signal using the servo data from the pulse time demodulator circuit module. | 07-15-2010 |
20100177434 | 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 code, a drive assembly to induce relative motion between the tape and the tape drive, a servo system to control the lateral and longitudinal motion between the tape and the tape head, the servo system comprising a sampling module to sample servo data from the tape media, and a position signal processor to calculate a position signal using the servo data from the sampling module, wherein the position signal processor calculates a position signal based on each adjacent servo element set. | 07-15-2010 |
20120019948 | ARRANGEMENT AND PROCESSING OF LONGITUDINAL POSITION INFORMATION ON A DATA STORAGE MEDIUM - There is described apparatus ( | 01-26-2012 |
20120154950 | TAPE DRIVE - A tape drive comprising a head configured to read data from a tape and to write data to the tape, a pair of flanged guide rollers arranged one on either side of the head to guide the tape longitudinally over the head, and a flangeless inertial roller arranged between a flanged guide roller and the head to add inertia to the tape so as to limit speed and movement of the tape as it passes over the head. | 06-21-2012 |
Patent application number | Description | Published |
20100079897 | Storage Device With Pulsed Motor Torque - A system and method for overcoming adhesion between media and a surface of a storage device in contact with the media. A storage device comprises a media velocity detector and a media drive motor controller. The media velocity detector detects storage media velocity as torque is applied to a storage media. The media drive motor controller causes a media drive motor to apply acceleration torque to the storage media. If the media velocity detector detects no increase in media velocity as acceleration torque is applied to the storage media, then the media drive motor controller causes the media drive motor to apply a torque pulse to the storage media. | 04-01-2010 |
20100079905 | Method And Apparatus For Determining Position Of A Storage Medium - A system and method for determining the value of a longitudinal position (“LPOS”) bit of a storage medium. A system comprises a selector that selects a value for a longitudinal position (“LPOS”) bit from a plurality of possible values derived from LPOS information read from a storage medium. A quality determiner that determines a quality value for each of a plurality of LPOS values derived from the LPOS information. The selection of the value for the LPOS bit is based, at least in part, on the quality values. | 04-01-2010 |
20100091411 | NON-RADIAL BEARING PRELOAD - A system and method for reducing resonance in a data transfer system are herein disclosed. A data transfer system comprises a bearing and a guide member. The bearing further comprises an outer ring. The guide member is arranged relative to the bearing so as to guide the outer ring for movement relative to the guide member, and to induce an axial preload in the bearing assembly. | 04-15-2010 |
20100328802 | Servo Write Head Gap Width Correction - Embodiments include methods, apparatus, and systems for servo write head gap width correction. One method includes measuring a pulse mismatch for servo stripes on magnetic tape written with a servo write head having servo head gaps with different physical sizes, and separately energizing the servo head gaps to correct the pulse mismatch so servo stripes written on the magnetic tape are within a predefined tolerance. | 12-30-2010 |
20110063752 | SENSOR POSITION ADJUSTMENT WITH MEDIA VELOCITY RELATIVE SAMPLE TIMING - A system and method for positioning a sensor relative to a storage medium. A system includes a first sensor and a second sensor arranged so that a point of a storage medium traverses each sensor at a different time. A processor is coupled to the sensors. The processor varies the timing of a sample representing a noise signal received from the sensors in accordance with medium velocity. The processor adjusts the position of the sensors based on the sample. | 03-17-2011 |
20110255195 | 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 carrier structure to carry the head module, and an actuator to move the head element block relative to the at least one media bearer element. Tape drive apparatus having actuator apparatus to cause relative displacement between head element blocks is also disclosed. A transducer head module and a method of making a transducer head assembly are also disclosed. | 10-20-2011 |
20120008232 | CONTROLLING POSITIONS OF STORAGE MEDIA HEADS - Controlling positions of storage media heads is disclosed. An example storage media head position controller includes a position error filter to filter a media head position error based on a target position for a storage media head relative to a storage medium and a present media head position to generate a position signal, and a media speed monitor to modify an integration factor in the position error filter based on a media speed to adjust a phase margin of the position control loop. | 01-12-2012 |
20120243124 | ACTUATOR WITH NON-MOVING MASS - An actuator for a tape drive is disclosed. The actuator has a moving mass and a non-moving mass. The non-moving mass is at least 107 grams. | 09-27-2012 |
20120281309 | REDUCING A NOISE COMPONENT ASSOCIATED WITH MOVEMENT OF A MOVEABLE PART - An output is generated in response to an indication associated with movement of a moveable part in a storage device. The output is for reducing a noise component associated with the movement of the moveable part. | 11-08-2012 |
20130182346 | TAPE HEAD LENGTH ADJUSTMENT - A tape drive is disclosed. The tape drive determines a current tape width and adjusts the length of a tape head to more closely match the current tape width. The tape drive adjusts the length of the tape head by controlling the power to a heating element coupled to the tape head. | 07-18-2013 |
20130188271 | TAPE WIDTH MEASUREMENTS - A tape drive is disclosed. The tape drive determines a current tape width and writes data to the tape as well as the current tape width. The tape width written to the tape is associated with the data. When reading data from a tape the tape drive reads the stored tape width and adjusts the current tape width to match the stored tape width before reading the data associated with the stored tape width. | 07-25-2013 |
20130222938 | SERVO PATTERN READ-BACK SIGNAL PROCESSING FOR STORAGE DEVICES - Servo pattern read-back signal processing for storage devices is described. In an example, a method of processing a read-back signal derived from a servo pattern on a storage medium in a storage device includes differentiating the read-back signal in an analog domain to produce a differentiated signal; and converting the differentiated signal into digital samples. | 08-29-2013 |
20140040655 | TAPE DRIVE RETRY - The present disclosure provides techniques for operating a tape drive. A method of operating a tape drive includes monitoring a parameter of the tape drive during a data access operation. The method also includes detecting an access failure. The method further includes selecting a treatment based on the parameter, applying the treatment, and performing a retry. | 02-06-2014 |