Class / Patent application number | Description | Number of patent applications / Date published |
360730010 | Speed | 65 |
20080304174 | OPTIMIZING TAPE SPEED FOR A SYNC OPERATION - Provided are techniques for determining a tape speed for a next sync operation. A sync command is received. An average transaction size and an average host transfer rate of a set of previous sync operations are calculated. The tape speed for the next sync operation is determined using the average transaction size, the average host transfer rate, and a backhitch time. Data is written to a tape cartridge using the determined tape speed. | 12-11-2008 |
20090097150 | INTERPOLATED JUST-IN-TIME SEEK TRAJECTORIES - Methods and apparatus of the present invention allow for interpolated Just in Time (iJIT) seek command control of hard drive actuators. | 04-16-2009 |
20090231751 | METHOD AND APPARATUS FOR SERVO CONTROL ASSOCIATED WITH ROTATIONAL SPEED OF DISK IN DISK DRIVE - According to one embodiment, a disk drive is disclosed to which a plurality of disk rotational speed modes can be set. The disk drive is configured such that input of servo data from servo sectors is thinned out by thinning out an output of an interrupt request to a CPU in a high-speed rotation mode. At the time, a disk controller obtains servo data reproduced from all the servo sectors at timing of servo gates and stores it to a register. | 09-17-2009 |
20090303632 | SCHEDULING SPIN-UP OPERATIONS FOR A SET OF HARD DISK DRIVES - Some embodiments of the present invention provide a system for scheduling spin-up operations for a set of hard disk drives (HDDs) in a computer system. During operation, the system determines an available power of the computer system. Next, one or more HDDs are selected from the set of HDDs to be spun-up based on the available power and the power required to spin up each HDD. Then, spin-up operations are scheduled for the selected HDDs. | 12-10-2009 |
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 |
20110051280 | OVERHEAD CALCULATION IN WRITING SYNCHRONIZED DATA TO MAGNETIC TAPE - Various embodiments for writing received synchronized data to magnetic tape having a plurality of wraps using a magnetic tape drive adapted for performing the writing according to an available plurality of predefined tape speeds are provided. In one such embodiment, for each of the available plurality of predefined tape speeds, an average overhead per synchronized command for performing a recursively accumulated backhitchless flush (RABF) cycle is calculated. One of the available plurality of predefined tape speeds having a lowest calculated average overhead is selected. The RABF cycle is performed using the selected one of the available plurality of predefined tape speeds. | 03-03-2011 |
20110181981 | Method and system for rotational control of data storage devices - Embodiments of methods and systems for controlling access to information stored on memory or data storage devices are disclosed. In various embodiments, fluid-mediated modification of information or access to information is utilized. According to various embodiments, data storage devices designed for rotating access are described which include rotation-activated fluid control mechanisms. | 07-28-2011 |
20120140355 | Reliability-Aware Disk Power Management - A token value is maintained based on an allowable number of low power transitions of a hard disk drive without adversely affecting reliability, compared to an actual number of low power transitions of said hard disk drive. The allowable number of low power transitions increases over the hard disk drive's lifetime. Before the hard disk drive performs a low power transition, the token is evaluated to determine if the hard disk drive is allowed to perform a low power transition. Low power transitions discussed include parking the head and spinning-down the hard disk drive. | 06-07-2012 |
20130027805 | INFORMATION PROCESSING APPARATUS AND DISK DEVICE CONTROL METHOD - According to one embodiment, an information processing apparatus includes: a main unit; a first disk device provided in the main unit; a second disk device provided in the main unit; an acceleration sensor provided in the main unit and detecting an acceleration; a setting module for setting whether to execute a disk protection processing for at least one of the first disk device and the second disk device or not; and a controller for executing the processing on the disk device for which the execution of the processing is set by the setting module, when an acceleration is detected by the acceleration sensor. | 01-31-2013 |
20130141815 | ADJUSTING ROTATIONAL SPEED BASED ON AMBIENT TEMPERATURE IN A HDD - A HDD including a temperature sensor for sensing ambient temperature in the HDD, a spindle motor comprising a fluid dynamic bearing; and a controller configured for adjusting a rotational speed of the spindle motor based on the measured ambient temperature while a rigidity of the fluid dynamic bearing is maintained, and reducing power consumption of the HDD based on the adjusting the rotational speed of the spindle motor. | 06-06-2013 |
20130176642 | SELECTIVELY LOWERING RESISTANCE OF A CONSTANTLY USED PROTION OF MOTOR WINDINGS IN DISK DRIVE - Dynamic reconfiguration-switching of motor windings in a disk drive is optimized between winding-configurations by selectively lowering resistance of a constantly used portion of one of the motor windings. Acceleration is traded off in favor of higher velocity upon detecting the electric motor in the electric vehicle is at an optimal angular-velocity for switching to an optimal lower torque constant and voltage constant. The total back electromotive force (BEMF) is prohibited from inhibiting further acceleration to a higher angular-velocity. | 07-11-2013 |
360730020 | Control of relative speed between carriers | 3 |
20140029132 | METHOD AND SYSTEM FOR GOVERNING AN ENTERPRISE LEVEL GREEN STORAGE SYSTEM DRIVE TECHNIQUE - A method and system for manipulating a spin state of each disk in a drive array is disclosed. In one embodiment, a method includes monitoring input/output (I/O) requests to each disk drive in a disk array and identifying any disk drive as an inactive disk drive based on a number of I/O requests directed to said any disk drive for a given time interval. The method further includes moving data from the inactive disk drive to an active disk drive having a free disk space to store the data and updating metadata associated with the data using a log-structured file system for the disk array. Further, the method includes manipulating a spin state of the inactive disk drive by spinning down the inactive disk drive to conserve power. Furthermore, the method includes redirecting subsequent I/O requests for the inactive disk drive to the active disk drive by accessing the metadata of the log-structured file system. | 01-30-2014 |
20140268402 | METHODS AND SYSTEMS FOR OPTIMIZED STAGGERED DISK DRIVE SPINUP - An array may comprise a plurality of disk drives and a controller coupled to the plurality of drives. The controller may be configured to initiate spin-up of one or more first disk drives of the array; determine when each of the first disk drive(s) of the array for which spin-up was initiated reaches a predetermined spin rate that is less than a target spin rate at which the disk drive is ready to process data access commands; and initiate spin-up of one or more second disk drives of the array as the first disk drive(s) is determined to have reached the predetermined spin rate. | 09-18-2014 |
20150015987 | Prioritized Spin-Up of Drives - A data storage system controller designates critical drives for staggered spin up and other, non-critical drives for spin up only when the controller notifies the appropriate expander. Each expander in the data storage system maintains configuration information for each PHY of the expander and reports completion of spin up when all of the drives designated “staggered spin up” have been spun up. Alternatively, an expander maintains PHY configuration data, designating each PHY as “staggered spin up,” “host notify” or “disabled.” At boot time, only devices connected to PHYs designated “staggered spin up” are spun up in cycles before reporting spin up completion to a host device. | 01-15-2015 |
360730030 | Rotary carrier | 25 |
20080218894 | SPINDLE MOTOR, AND RECORDING AND REPRODUCING APPARATUS EQUIPPED WITH THE SAME - It is an object of the present invention to make it possible to suppress, to the maximum extent possible, deformation of the recording medium caused by clamping in a spindle motor having a medium-carrying surface. | 09-11-2008 |
20080278841 | SELECTIVELY INHIBITING TRANSDUCER OUTPUT RESPONSIVE TO DETECTED JERK - Various embodiments relate to selectively inhibiting output from a transducer in response to the rate of change of acceleration that is experienced by the transducer. The rate of change of an acceleration signal, which is indicative of transducer's acceleration, is detected. Output of a signal through the transducer is selectively inhibited in response to the detected rate of change of the acceleration signal. | 11-13-2008 |
20090015960 | Magnetic disk drive and magnetic disk medium - Embodiments of the invention increase the convenience of a magnetic disk drive for portable use by shortening a period of time required to record a large amount of data, and by increasing the reproduction time, in the magnetic disk drive. In one embodiment, an area between servo data parts is interpolated by servo data parts, each of which stores a burst signal, so that the allocation density of a burst signal is made k times. At the time of write operation in which data is written, only the servo data parts are made use of to perform the servo control while a disk is driven at high rotational speed so as to reduce the recording time. At the time of read operation in which data is reproduced, the servo data parts are made use of to ensure the required precision of the servo control at low rotational speed that is 1/k of the rotational speed at the time of write operation. The reproduction at low rotational speed enables the reduction in power consumption. | 01-15-2009 |
20090168221 | METHOD AND SYSTEM FOR DETECTING A CHANGE IN A ROTATIONAL VELOCITY OF A MAGNETIC DISK OR A SPINDLE COUPLED TO THE MAGNETIC DISK - A method according to one embodiment comprises detecting a change in a rotational velocity of a magnetic disk or a spindle coupled to the magnetic disk, the change being caused by head-disk contact. A method for detecting head-disk contact according to another embodiment comprises measuring a rotational velocity of a magnetic disk or a spindle coupled to the magnetic disk; detecting a change in the rotational velocity, the change being caused by head-disk contact; and correlating the change in rotational velocity with the head-disk contact. | 07-02-2009 |
20090190248 | Dynamic System Control Method - Techniques are provided herein for reducing vibrations in various modes of a dynamic system. One such technique comprises incorporating vibration limiting and sensitivity constraints into a partial fraction expansion equation model of the system so as to reduce vibrations to specific levels. Another technique comprises shaping a command determined using the partial fraction expansion equation model to produce a desired output. The entire command may be shaped or only selected portions thereof which produce vibrations. Another technique involves commanding in current to produce saturation in voltage. By doing this it is possible to command voltage switches. The times at which the switches occur can be set to reduce system vibrations. Other techniques are also provided. These include varying transient portions at the beginning, middle and/or end of a move and using Posicast inputs, among others. | 07-30-2009 |
20100053795 | MAGNETIC RECORDING AND REPRODUCING APPARATUS HAVING A MAGNETIC READ HEAD WITH A SPIN-TORQUE OSCILLATOR - A magnetic recording and reproducing apparatus includes a magnetic head that has a spin-torque oscillator and a magnetic disk and the spin-torque oscillator detects a magnetic field from the magnetic disk and outputs a signal. A criterion used to determine the rotational speed of the magnetic disk, the frequency shift of the spin-torque oscillator produced by a magnetic field from the magnetic disk, a characteristic oscillation frequency of the spin-torque oscillator and the full-width at half maximum of an oscillation spectrum is given in order for a read signal output from the spin-torque oscillator to satisfy a desired signal-to-noise ratio and a magnetic recording and reproducing apparatus is configured based on the criterion. | 03-04-2010 |
20100157463 | DISK DRIVE SPIN CONTROL - A disk drive configured to control spindle spin is provided. The disk drive includes a spindle motor for spinning a disk configured for storing data, a nonvolatile memory comprising instructions associated with a first process for spin-up of the spindle motor from a power-on mode and the nonvolatile memory comprising instructions associated with a second process for spin-up of the spindle motor from a power save mode, a controller for determining which of the first or the second process for spin-up of the spindle motor to implement in accordance with the instructions stored in the nonvolatile memory and a motor driver for spinning up the spindle motor according to the first process or according to the second process for spin-up of the spindle motor. | 06-24-2010 |
20100195243 | Variable Spindle Speed Control for Data Storage Devices - In a particular embodiment, a system is disclosed that includes a solid-state data storage medium, a disc data storage medium, and a controller adapted to selectively adjust a spindle speed associated with the disc data storage medium and a buffer size associated with the solid-state data storage medium responsive to a trigger. | 08-05-2010 |
20100238583 | DISK DEVICE - According to one embodiment, a disk device rotates a disk information storage medium to record and reproduce information on the information storage medium by use of a head that slides in contact with a lubricant coated on the information storage medium, wherein a sliding speed U, area A and normal force N are set to cause U×A/N to fall within a monotonously increasing region in which a coefficient of friction associated with a frictional force occurring in a contact area of the head that faces the information storage medium monotonously increases as U×A/N increases, where the sliding speed U represents a sliding speed at a sliding time of the head, the area A represents the contact area of the head, and the normal force N represents a normal force applied to the contact area of the head. | 09-23-2010 |
20110122524 | STORAGE DEVICE - The present invention makes is possible to appropriately set the power saving control of the storage device from the management device of the storage device. In addition, the storage device executes control of the power saving for the magnetic disk device after ensuring consistency between an instruction from the administrator and the operating state of the magnetic disk device in the storage device. | 05-26-2011 |
20120014015 | HARD DISK DRIVE HAVING REGIONS CORRESPONDING TO DIFFERENT SPEEDS AT WHICH STORAGE SURFACE ROTATES - A hard disk drive includes a storage surface, a motor, a read/write had, and a number of regions into which the storage surface is divisible. Data is writable to and data is readable from the storage surface. The motor is to rotate the storage surface at a variable speed. The read/write head is to write data to and read data from the storage surface while the storage surface is rotated by the motor. Each region corresponds to a different speed at which the storage surface is rotated for the read/write head to write data to and read data from the region. | 01-19-2012 |
20120105998 | METHOD OF DETECTING TOUCHDOWN OF MAGNETIC HEAD USING TIMESTAMPS, AND MAGNETIC DISK DRIVE TO WHICH THE METHOD IS APPLIED - According to one embodiment, a method of detecting contact of a magnetic head with a magnetic disk by changing the dynamic flying height of the magnetic head in a magnetic disk drive is disclosed. The method can change control of a spindle motor configured to rotate the magnetic disk, from feedback control to open loop control. The method can detect a change in rotational speed of the magnetic disk during the open loop control. The method can detect contact of the magnetic head with the magnetic disk based on the detected change in the rotational speed. | 05-03-2012 |
20120127600 | STORAGE CONTROL DEVICE AND ROTATION SPEED CONTROL METHOD FOR STORAGE DEVICE - To provide a storage control device capable of changing the rotation speed of storage devices. | 05-24-2012 |
20120250179 | STORAGE SYSTEM, STORAGE CONTROL APPARATUS, AND STORAGE CONTROL METHOD - In a storage system, when power supply to HDDs is instantaneously interrupted, a spin up controller of a magnetic disk apparatus spins up the HDDs. On the other hand, based on a response for an access to the HDDs in the magnetic disk apparatus, when detecting that the HDDs as an access destination are spun down, a spin up controller of a control apparatus spins up the HDDs. When a certain number of the HDDs or more are spun down, a separate controller does not permit the magnetic disk apparatus to be used for a given length of time. While the magnetic disk apparatus is not permitted to be used, the HDDs are spun up by using the spin up controller of the magnetic disk apparatus. | 10-04-2012 |
20130070363 | SYSTEMS AND METHODS FOR DATA THROTTLING DURING DISK DRIVE POWER DOWN - Some embodiments of the invention are directed to a data storage system that includes a disk and solid-state non-volatile memory (NVM). During a power failure, the data storage system may use back EMF (BEMF) voltage from the spindle motor of the disk to park the heads of the disk and/or store data in the NVM. In one embodiment, a demand regulation circuit regulates loads that use voltage generated from the BEMF. The demand regulation circuit may be used to selectively cause a controller to adjust the rate of programming to the NVM in order to reduce the load. For example, the demand regulation circuit may assert a throttle signal to the controller upon detecting that the voltage generated from the BEMF is below a certain threshold. Programming rate may be throttled, programming cycles may be staggered, and/or programming time may be lengthened. Throttling may enable the use of smaller circuitry. | 03-21-2013 |
20140078610 | MOTOR DRIVE DEVICE, MAGNETIC DISK STORAGE DEVICE, AND ELECTRONIC APPLIANCE - A motor drive device has: a power supply line to which a power supply voltage is applied; a ground line to which a ground voltage is applied; and a first motor driver that, when the power supply voltage is normal, rotates an N-phase first motor (where N is an integer of 2 or more) by using the supply voltage and, when the power supply voltage is abnormal, generates a rectified voltage from phase voltages of different phases appearing while the first motor is idling to regenerate the rectified voltage to the power supply line. The first motor driver, when generating the rectified voltage, boosts the rectified voltage by periodically repeating a brake cycle to make all the terminals of the different phases of the first motor conduct to the ground line and a boost cycle to rectify the phase voltages of the different phases synchronously while making at least one of the terminals of the different phases conduct to the power supply line. | 03-20-2014 |
20140078611 | Method and System for Preventing Unreliable Data Operations at Cold Temperatures - Systems and methods for reducing problems and disadvantages associated with protecting data during cold excursions are provided. A method for preventing unreliable data operations at cold temperatures may include determining whether a first internal temperature of a hard disk drive (HDD) is below a threshold temperature. The method may also include initiating an artificial seek operation if the first internal temperature is below the threshold temperature. | 03-20-2014 |
20140313611 | CONTROL CIRCUIT FOR HARD DISK DRIVE - A control circuit for a hard disk drive (HDD) includes a control chip, a connector connected between the control chip and a motherboard, and a function transform circuit connected between the control chip and the connector. A status pin of the control chip is connected to a status receiving pin of the connector through the function transform circuit, to send a working state signal of the hard disk drive to the status receiving pin of the connector. The status receiving pin shows a normal operation of the HDD through a light emitting diode connected to the status receiving pin. The function transform circuit provides a high level signal to a staggered spin-up pin of the control chip, to make the control chip control the hard disk drive to execute staggered spin-up function. | 10-23-2014 |
20140320998 | DISK DRIVE WITH IMPROVED SPIN-UP CONTROL - A disk drive is disclosed comprising a head actuated over a disk, and a spindle motor operable to rotate the disk. The spindle motor operates according to a plurality of electrical cycles over a single revolution of the spindle motor, where each electrical cycle spans a cycle period. A plurality of the cycle periods are measured, at least two of the cycle periods are combined, and a rotation speed of the spindle motor is measured based on the combined cycle periods. | 10-30-2014 |
20140340783 | BACK ELECTROMOTIVE FORCE MONITORING CIRCUIT, MOTOR DRIVE DEVICE, MAGNETIC DISK STORAGE DEVICE, AND ELECTRONIC APPLIANCE - A back electromotive force monitoring circuit has a speed detection voltage generator which biases a back electromotive force generated by a voice coil motor with a predetermined reference voltage to generate a speed detection voltage, and a calculator which generates a motor control signal in accordance with the speed detection voltage. The calculator includes a subtracter which subtracts the reference voltage from the speed detection voltage prior to generation of the motor control signal. | 11-20-2014 |
20140376125 | CONTROL SYSTEM FOR HARD DISKS - A control system for a group of hard disks includes a power supply and a connecting module. The power supply supplies power for the group of hard disks. The connecting module couples the power supply to the group of hard disks. The group of hard disks has a number of hard disks. When the connecting module is coupled between the power supply and the group of hard disks, a staggering spin-up function of the plurality of hard disks is activated. | 12-25-2014 |
20150364156 | CURRENT-BASED ENVIRONMENT DETERMINATION - Provided is an apparatus including a motor configured to rotate a rotating member at a rotational speed based on an applied current; and a controller configured to modify one or more operating parameters in response to determining whether a change in an environment has occurred based on the applied current. | 12-17-2015 |
20150380045 | DISK DRIVE WITH IMPROVED SPIN-UP CONTROL - A disk drive is disclosed comprising a head actuated over a disk, and a spindle motor configured to rotate the disk. The disk drive further comprises control circuitry configured to measure a rotation speed of the spindle motor, generate a feed-forward control based on the measured rotation speed, and spin-up the spindle motor based on the feed-forward control. | 12-31-2015 |
20160012845 | DATA STORAGE DEVICE EMPLOYING SLIDING MODE CONTROL OF SPINDLE MOTOR | 01-14-2016 |
20160148640 | PERFORMANCE PACING FOR HARD DISK DRIVES - To provide enhanced operation of data storage devices and systems, various systems, apparatuses, methods, and software are provided herein. In a first example, a data storage device is provided. The data storage device includes one or more rotating storage media configured to rotate at a first rotation rate. The data storage device also includes a processing system configured to enter a performance pacing mode for the data storage device and alter performance of the data storage device based on at least a second rotation rate. | 05-26-2016 |
360730040 | Linear carrier | 26 |
20090219643 | DETERMINING ANGULAR POSITION OF A TAPE REEL USING TIMING BASED SERVO FORMAT - Provided are techniques for determining an angular position of a tape reel. A first edge of a hall sensor is identified. A number of format transitions on a timing based servo formatted tape are counted until detecting a predetermined edge of the hall sensor. A reel circumference is determined. A radius is determined using the determined reel circumference. A new circumference of a next revolution is determined using the determined radius and a tape thickness. A current angular position is determined using the determined new circumference and the counted format transitions. | 09-03-2009 |
20090219644 | DETERMINING A REEL MOTOR ANGLE USING AN ESTIMATED INTERVAL TO DEGREES TRANSLATION FACTOR - Provided are techniques for determining a reel motor angle. An estimate of an interval to degrees translation factor that represents a measurement angle interval divided by a first pulse count is calculated, wherein the first pulse count represents format transitions counted during an angular measurement interval. A reel motor angle is determined using the estimate by: receiving an indication that a rotating reference point has crossed a stationary reference point, wherein the indication is recognized as indicating that an angle between a motor rotor and a motor stator is a reference angle; determining a second pulse count, wherein the second pulse count represents format transitions counted since the indication was received to a given point in time; and at the given point in time, multiplying the second pulse count by the estimate to generate a first value and adding the reference angle to the first value to generate the reel motor angle. | 09-03-2009 |
20110116185 | TRANSPORT SPEED ADJUSTMENT DEVICE, TRANSPORT SPEED ADJUSTMENT METHOD AND TRANSPORT SPEED ADJUSTMENT PROGRAM FOR ADJUSTING TRANSPORT SPEED OF TAPE MEDIUM - A tape drive capable of switching the transport speed of a tape medium among multilevel speeds calculates a data transfer rate from/to a host device, and selects an adjustment mode of the transport speed of the tape medium from a constant speed mode and a speed switch mode according to the calculated data transfer rate. The tape drive in the speed switch mode, pauses a data write or read operation to switch the transport speed of the tape medium while data is written at a first transport speed and when an available capacity of a buffer memory reaches a data volume to be received from the host device during switching of the transport speed and is read out at the first transport speed and when a data volume of a buffer memory reaches a data volume to be transmitted to the host device during switching of the transport speed. | 05-19-2011 |
20120206831 | TRANSPORT SPEED ADJUSTMENT DEVICE, TRANSPORT SPEED ADJUSTMENT METHOD AND TRANSPORT SPEED ADJUSTMENT PROGRAM FOR ADJUSTING TRANSPORT SPEED OF TAPE MEDIUM - A tape drive capable of switching the transport speed of a tape medium among multilevel speeds calculates a data transfer rate from/to a host device, and selects an adjustment mode of the transport speed of the tape medium from a constant speed mode and a speed switch mode according to the calculated data transfer rate. The tape drive in the speed switch mode, pauses a data write or read operation to switch the transport speed of the tape medium while data is written at a first transport speed and when an available capacity of a buffer memory reaches a data volume to be received from the host device during switching of the transport speed and is read out at the first transport speed and when a data volume of a buffer memory reaches a data volume to be transmitted to the host device during switching of the transport speed. | 08-16-2012 |
20120229931 | APPARATUS AND METHOD FOR CONTROLLING TRANSPORTATION OF TAPE MEDIUM - High performance is obtained without preventing achievement of a target read data rate. | 09-13-2012 |
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 |
20130021693 | MAGNETICALLY BIASED TILTING ROLLER BEARING TAPE GUIDANCE - A tape movement constraint for a tape drive system, comprises a tiltable tape roller bearing having a grooved surface adapted to contact and engage a surface of the tape as the roller barrel rotates, and an actuator adapted to pivot the roller bearing surface when the actuator is actuated, to control the lateral position of a tape. In operation, in one embodiment, a roller barrel of the tiltable roller bearing is biased in a first position on a pivot axis, using magnetic attraction between a movable magnet and a return path structure of magnetically permeable material. The roller barrel is pivoted on the pivot axis by conducting current through a fixed coil to generate a magnetic field which is conducted by the return path structure to interact with the magnetic field of the magnet. Other embodiments are described and claimed. | 01-24-2013 |
20130044389 | DATA FILE INFORMATION BASED SELECTION OF TAPE DRIVE TAPE SPEED - A microprocessor of a tape drive may identify a pattern associated with data files previously written to tape, predict information about a next data file to be written to the tape based on the pattern, select a tape rate based on the predicted information, and operate the tape drive at the selected tape rate. | 02-21-2013 |
20140285920 | TAPE CARTRIDGE AND TAPE DEVICE - A tape cartridge includes a drive gear that is rotatably driven by a driving device, a first reel that winds a first tape-like storage medium therearound and is rotatable by a driving force transmitted from the drive gear, a second reel that winds a second tape-like storage medium therearound and is rotatable by a driving force transmitted from the drive gear, and a blocking unit that blocks transmission of the driving force from the drive gear to the first or second reel. | 09-25-2014 |
20150036237 | CONTROLLING A TAPE SPEED TO MANAGE A TAPE DRIVE BUFFER - Provided are a storage device, method, and program for controlling a tape speed to manage a tape drive buffer. A tape speed is increased from a current tape speed to a target tape speed on a predetermined speed-change timing to control the reading or writing of data between the buffer and the tape medium. | 02-05-2015 |
20150340056 | APPARATUS AND METHOD FOR CONTROLLING TRANSPORTATION OF TAPE MEDIUM - An apparatus, computer readable medium device, and method for controlling transportation of a tape medium. A determination is made whether to execute a backhitch operation in response to writing a data set to tape from the buffer. If not, a determination is made whether a transaction size at which data is transferred from the buffer to the tape is less than a buffer size. If so, then a determination is made of a a new speed and whether a current speed is different from the determined new speed. If so, then a backhitch is initiated. | 11-26-2015 |
360730050 | Plural speed transport | 14 |
20080247077 | APPARATUS, SYSTEM, AND METHOD FOR OPTIMIZING FAST ACCESS DATA STORAGE ON SEGMENTED TAPE MEDIA - An apparatus, system, and method are disclosed for optimizing fast access data storage on segmented tape media. The apparatus, in one embodiment, is configured to selectively write data to a tape storage medium. The selection module may select data for storage as one of fast access and slower access. Fast access data may be stored on the first segment, or fast access portion, of a tape storage medium to provide optimal speed for data retrieval. Slower access data may be stored on the remaining available storage space of the tape storage medium. Additionally, read requests for fast access data may be accessed more quickly than read requests for slower access data. Thus, user data may be selected and written to a tape storage medium relative to a preferred access time. | 10-09-2008 |
360730060 | Automatic change between fixed speeds | 3 |
20130003218 | DYNAMIC RECONFIGURATION-SWITCHING OF WINDINGS IN A TAPE STORAGE DRIVE - Dynamic reconfiguration-switching of motor windings is optimized between winding-configurations. Acceleration is traded off in favor of higher velocity upon detecting a tape storage drive is at an optimal angular-velocity for switching to an optimal lower torque constant and voltage constant. The total back electromotive force (BEMF) is prohibited from inhibiting further acceleration to a higher angular-velocity. | 01-03-2013 |
20140022665 | CONTROLLING A TAPE SPEED TO MANAGE A TAPE DRIVE BUFFER - Provided are a storage device, method, and program for controlling a tape speed to manage a tape drive buffer. A tape speed is increased from a current tape speed to a target tape speed on a predetermined speed-change timing to control the reading or writing of data between the buffer and the tape medium. | 01-23-2014 |
20160104506 | APPARATUS AND METHOD FOR CONTROLLING TRANSPORTATION OF TAPE MEDIUM - An apparatus, computer readable medium device, and method for controlling transportation of a tape medium. A determination is made whether to execute a backhitch operation in response to writing a data set to tape from the buffer. If not, a determination is made whether a transaction size at which data is transferred from the buffer to the tape is less than a buffer size. If so, then a determination is made of a a new speed and whether a current speed is different from the determined new speed. If so, then a backhitch is initiated. | 04-14-2016 |
360730070 | Automatic selection of carrier or track speed | 1 |
20130016439 | TAPE REWIND TO LIMIT AIR ENTRAPMENTAANM ARGUMEDO; ARMANDO J.AACI TUCSONAAST AZAACO USAAGP ARGUMEDO; ARMANDO J. TUCSON AZ USAANM BAYANG; JOSEPHINE F.AACI TUCSONAAST AZAACO USAAGP BAYANG; JOSEPHINE F. TUCSON AZ USAANM GALE; ERNEST S.AACI TUCSONAAST AZAACO USAAGP GALE; ERNEST S. TUCSON AZ USAANM HANCOCK; REED A.AACI TUCSONAAST AZAACO USAAGP HANCOCK; REED A. TUCSON AZ USAANM OGURA; EIJIAACI KANAGAWAAACO JPAAGP OGURA; EIJI KANAGAWA JP - In a tape drive having a rotatable take-up reel supporting an end of an elongate tape, a drive control system for rotating the take-up reel and for rotating a tape supply reel of a removable tape cartridge. The drive control system is arranged to tension and move the elongate tape between the reels. At rewind, the drive control system rewinds the elongate tape onto the supply reel at rewind velocity under tension; upon the rewinding approaching the end of the elongate tape, rewinds the elongate tape at a reduced velocity under tension, the reduced velocity less than 60% of the rewind velocity; and stops the reduced velocity rewinding for a period of time and maintains the elongate tape in a dwell state under tension which is greater than an operating tension during tape motion. The dwell state time period may be substantially 10 seconds. | 01-17-2013 |
360730080 | Variable speed | 9 |
20110205662 | CONTROLLING AN ELECTRIC MOTOR BY DYNAMIC SWITCHING - An apparatus for controlling an electric motor is provided. A plurality of switches is provided for controlling a direction of current through motor coils of the electric motor. A brushless motor control circuit is connected to each of the plurality of switches. Responsive to a request to adjust one of an angular velocity and an angular acceleration of the electric motor, the plurality of switches are activated to place the motor coils in a predetermined configuration to maximize torque or reduce a total back electromotive force (BEMF) from the motor coils. | 08-25-2011 |
20140063643 | TENSION TRANSIENTS SUPPRESSION DURING ACCELERATION AND/OR DECELERATION FOR STORAGE TAPE DRIVE - In one embodiment, a system includes a controller configured to: determine a reference velocity at various intervals, receive or determine a secondary velocity based at least in part on a parameter associated with a drive mechanism motor, determine a value representative of a difference between the reference velocity and secondary velocity, adjust a speed of the motor of the drive mechanism for minimizing the difference between the reference velocity and secondary velocity, receive/determine a primary velocity based on reading information encoded on a magnetic tape, at a switching point, make the reference velocity about equal to the primary velocity, after the switching point, determine the reference velocity at various intervals, after the switching point, determine a value representative of a difference between the reference velocity and primary velocity, and adjust the speed of the motor of the drive mechanism for minimizing the difference between the reference velocity and primary velocity. | 03-06-2014 |
20140126079 | ERROR RECOVERY PROCEDURE (ERP) USING ESTIMATED BEST SETTING IN FIRST RUN - In one embodiment, an apparatus includes logic configured to count each data set read and/or write access that used error recovery procedure (ERP) and each data set read and/or write access that did not use ERP, and logic configured to access subsequent data sets to read from and/or write to a data storage medium, wherein any subsequent data set read and/or write access that uses ERP is accessed using an initial ERP step characterized by a first speed of the data storage medium, and wherein the first speed is selected at least partially based on the count. Other systems and methods for ERP data access are described according to more embodiments. | 05-08-2014 |
20140126080 | TENSION TRANSIENTS SUPPRESSION DURING ACCELERATION AND/OR DECELERATION FOR STORAGE TAPE DRIVE - A method according to one embodiment includes receiving or determining primary velocity based on at least c of reading information encoded on a magnetic tape and a parameter associated with a motor of a drive mechanism. At a switching point, a reference velocity is made about equal to the primary velocity. After the switching point, the reference velocity is determined at various intervals. Also after the switching point, a value representative of a difference between the reference velocity and the primary velocity is determined, and a speed of the motor of the drive mechanism is adjusted for minimizing the difference between the reference velocity and the primary velocity. A system according to one embodiment includes a controller for controlling a drive mechanism, the controller being configured to perform the foregoing method. | 05-08-2014 |
20140268403 | TAPE FRICTION MEASUREMENT - According to one embodiment, a method includes determining whether a primary velocity is valid and/or in a steady state; averaging a velocity error over a predetermined time period upon determining the primary velocity is valid and/or in a steady state; and calculating a new friction value based on the averaged velocity error. | 09-18-2014 |
20150015988 | TAPE STORAGE DEVICE - A method, and apparatus configured to perform such method, according to various embodiments, includes writing data stored in a buffer onto a recording medium using a write head in a first round of writing. An interval marker is written on the recording medium in the first round of writing when the buffer is empty. Next data is written onto the recording medium after the interval marker in the first round of writing. Data is written in an area of the interval marker in a second round of writing performed subsequent to the first round. | 01-15-2015 |
20150124349 | APPARATUS AND METHOD FOR CONTROLLING TRANSPORTATION OF TAPE MEDIUM - An apparatus, computer readable medium device, and method for controlling transportation of a tape medium. A determination is made whether to execute a backhitch operation in response to writing a data set to tape from the buffer. If not, a determination is made whether a transaction size at which data is transferred from the buffer to the tape is less than a buffer size. If so, then a determination is made of a a new speed and whether a current speed is different from the determined new speed. If so, then a backhitch is initiated. | 05-07-2015 |
20160086629 | 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) operations that avoids backhitching. The tape velocity is adjusted to the maximum velocity. | 03-24-2016 |
20160125909 | TENSION FEEDBACK FOR TAPE TENSION - A tension feedback signal is generated to reduce tension variation on a tape occurring at a reel frequency. Tension variation information may be obtained and used to generate the tension feedback signal. The tension feedback signal may be combined with a constant tension preset signal. The combined signal may be used to drive a tape reel at a tape reel speed adjusted according to the combined signal. | 05-05-2016 |
360730090 | Constant speed | 1 |
360730120 | By reproduced control signal | 1 |
20090219645 | APPARATUS AND METHOD TO DECODE LINEAR POSITION INFORMATION ENCODED IN A SEQUENTIAL INFORMATION STORAGE MEDIUM - A method to decode linear position (“LPOS”) information encoded in a sequential information storage medium, by detecting each of one or a plurality of sequential first LPOS servo patterns encoded in a first servo band using a first servo sensor in communication with a first servo channel. While detecting that one or a plurality of first LPOS servo patterns, the method fails to detect (n) second LPOS servo patterns encoded in a second servo band. The method determines a value for (n), and then syncs the first servo channel with the second servo channel using that value of (n). | 09-03-2009 |