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7577786 |
Restore accelerator for serial media backup systems
A method for accelerating a tape backup system restore process receives a list of files that are to be restored and searches a tape catalogue to find tape volume and file sequence numbers for each...
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7561367 |
Bi-directional debris sweeping profile
A bidirectional disc sweep routine accelerates the transducer in a storage device from a first predefined radius toward the inner radius to a second predefined radius, and accelerates the...
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7512865 |
Method for controlling read velocity in a disk device
A method for controlling read velocity in a disk device is provided. When reading data on the disc, the method first reads each SYNC of blocks to form an ECC code, read data to decode, and checks...
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7496696 |
Method and apparatus for evaluating performance on host data transfer within a tape drive
A method for evaluating data transfer performance within a data recording apparatus is disclosed. The data recording apparatus includes a buffer and a recording medium. Initially, a Pause time P...
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7453221 |
System for controlling rotation of a disk drive
A disk drive system is set forth that comprises a rotatable storage medium adapted to store data, a spindle motor disposed to rotate the rotatable storage medium, and a spindle motor control...
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7433146 |
Method for reducing occurrences of tape stick conditions in magnetic tape
Disclosed is a method for reducing occurrences of tape stick conditions in magnetic tape, the method including stopping functional rotation of each of two bi-directionally rotatable reels of a...
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7372657 |
Mechanism for minimizing unload times in a tape drive system
In one embodiment, a method and apparatus for minimizing unload times in a tape drive system is disclosed. The method includes: writing to a tape in serpentine format; reaching a comparison point...
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7291996 |
Optical disc drive and brake control method thereof
An optical disc drive 1 includes a spindle motor 11 for rotating the optical disc 2 and a spindle driver for driving the spindle motor 11 equipped with a rotation number counter 232 for...
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7253582 |
Disk drive estimating angular position of spindle motor during spin-up by computing differences in winding current rise times
A disk drive is disclosed comprising a spindle motor having a plurality of windings including at least a first winding, a second winding, and a third winding. During a spin-up operation, a voltage...
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7218468 |
Writing synchronized data to magnetic tape
Synchronized data is written to magnetic tape while reducing the number of backhitches. A controller detects a pattern of synchronizing events for received data records to be written to tape;...
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7158329 |
Disk drive employing active braking using inductive sense
A disk drive is disclosed comprising a disk, a head actuated over the disk, and a spindle motor for rotating the disk, the spindle motor comprising a plurality of windings. Disk control circuitry...
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7116508 |
Apparatus for locking a moveable part of a magnetic disk apparatus
A magnetic disk apparatus has: a magnetic disk having a magnetic film formed on a substrate; a spindle motor for rotating the magnetic disk; a magnetic head for writing/reading information on/from...
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7085091 |
Reducing tape media damage in data regions
A method and apparatus for reducing tape media edge damage in data regions. The present invention controls where popped strand occur by shifting the wrap turn around/stream points in the tape media...
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7064916 |
Magnetic tape apparatus with cleaning medium and method of controlling same
A magnetic tape apparatus for controlling a running of magnetic tape, and being able to control a cleaning medium to clean a magnetic head. The apparatus including a feed reel shaft and a take-up...
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6992847 |
Linear sliding tape scanner and method for using same
An apparatus for helical scan recording/playback of preselected tacks on a flexible tape medium comprising a linear slide structure capable of movement transversely relative to a longitudinal...
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6963467 |
Method and apparatus for compensating for media shift due to tape guide
A method and apparatus for compensating for media shift due to spiral groove roller tape guide is disclosed. The lateral tape shift is measured. Then the control of the coarse actuator is adjusted...
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6937416 |
Process for controlling the capstan in a video tape recorder (VTR)
In a video tape recorder (VTR), the capstan draws the tape from which the video signal is reproduced in a forward direction. The following steps are used to control the capstan, applying a torque...
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6934101 |
Method and apparatus using reverse disk rotation to achieve slider contact with a disk surface
A method for burnishing a slider in a disk drive in which the disk is rotated in the opposite or reverse direction from that used to develop the air-bearing and to read and write data is described....
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6850381 |
Apparatus and method for reducing data loss in tape media due to media edge damage on thrown wraps
A data storage magnetic tape uses a volume control region (VCR) that contains all of the control information for the tape. There is a large span of blank tape after the VCR region before the actual...
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6819072 |
Disk drive servo arm retract and spindle brake circuit
A spindle motor control circuit for controlling a motor; including a control circuit to control the motor during at least a low state, a pulse state and a high state, the motor braking during said...
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6801378 |
Data recording apparatus and method and data playback apparatus and method
To make the most of the storage capacity of a recording medium for data recording and reproduction, data is provisionally stored in a memory at a second data rate DL 2, then data is read from the...
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6801383 |
Method for calibrating a tape media using staggered calibration tracks
A staggered calibration track comprising a plurality of calibration tracks for use positioning a tape drive tape head for reading and writing data to and from multiple data tracks. The staggered...
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6798599 |
Disc storage system employing non-volatile magnetoresistive random access memory
An apparatus and method for caching data in a disc storage system are provided. The disc storage system includes a host computer interface adapted to couple to a host computer, a disc storage...
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6785076 |
Alternate tape repositioning method during data recovery
A method of alternate tape repositioning during data recovery which takes advantage of the reverse half of the tape forward/reverse cycle to perform an error recovery procedure invoking, thereby...
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6775087 |
Method and apparatus to read past EOD marker
A data storage device having a read-past-EOD marker flag is described herein. The read-past-EOD marker flag may be stored in a non-volatile memory, such as EEPROM, coupled to the data storage...
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6775086 |
Magnetic tape apparatus and method for controlling the running of a magnetic tape to stop at a stop position
In a magnetic tape apparatus for controlling a running of a magnetic tape to stop at a reference stop position, a control part controls the feed reel shaft and the take-up reel shaft to reel the...
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6760176 |
Method and apparatus for calibrating a tape transport servo system
A method for calibrating a tape transport servo system for a tape drive is disclosed. The tape reel motors are excited when the tape drive is not being controlled by the tape transport servo...
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6714375 |
Magnetic recording and reproducing apparatus and magnetic tape accessing method
A magnetic recording and reproducing apparatus according to the invention involves unloading a magnetic tape after the tape is positioned to one of its unloading regions which is located...
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6704155 |
Tape stopping mechanism
In a high-speed tape winding operation of a magnetic recording and reproducing apparatus, stable tape-stopping operation without generating any damages of the tape. In addition to the mechanical...
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6683742 |
Magnetic tape drive having a mechanism for preventing slack in a magnetic tape
A magnetic tape drive has a brake mechanism section which can transfer the state of a reel table from a non-brake state to a brake state by using an electric power that remains after a start of a...
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6636373 |
Tape running drive device and tape recording and or reproducing device
A tape drive apparatus includes a pair of reel holder gears respectively provided in reel shafts which are respectively engaged with a pair of reels around which a tape is wound, a switching...
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6587298 |
Device for reading and writing tape recording medium, accessing method therefor, and recording medium
A device for reading and writing data to a tape recording medium divides a magnetic tape into a plurality of partitions. At boundaries between the partitions, optional device areas (ODAs) are...
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6580577 |
Magnetic tape apparatus with forced magnetic tape cleaning process
A magnetic tape apparatus prevents dirt from being deposited on a magnetic tape even when the tape is repeatedly moved in a short interval. An operation monitoring unit calculates tape position...
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6580578 |
Method and apparatus for presenting both sides of a media to a read/write head in a storage device
A method and apparatus in a data storage system for accessing a tape storage media, wherein the tape storage media has a first side and a second side for storing data. The tape storage media is...
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6532128 |
Data set to recording media registration and synchronization
A system and method for precisely registering and synchronizing data sets on a recording media having a prerecorded servo pattern. The recording media is subject to continuing movement for reading...
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6496318 |
Magnetic disk storage device control method, disk array system control method and disk array system
A method and system which prevents starting-up problems in plural magnetic disk storage devices included in a disk array system during restart following halt of the magnetic disk storage devices...
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6466390 |
Recording and/or reproducing device for magnetic tape
A recording and/or reproducing apparatus for a magnetic tape includes a supply side reel gear a takeup side reel gear, a tape guide drum about which the magnetic tape pulled out from a tape...
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6426842 |
Tape travel controlling apparatus for use with data recorder
A tape controlling apparatus for use with a data recorder for recording and/or reproducing digital data on and/or from a tape-shaped recording medium. A target position signal for representing a...
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6417978 |
Recording medium searching method and recording medium processing device using the same method
When a program PA (0) is searched, the tape position for search starting is identified. A detection area is set based on the tape position and the record position of the program PA (0). The tape is...
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6373208 |
System for voltage regulation of a voice coil motor
A method is disclosed for controlling the voltage applied to a voice coil motor coil during the retract operations of a mass storage device, comprising a combination of three different voltage...
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6305628 |
Controlled tape stopping with feed forward during power loss
A reel-to-reel tape system stops movement of the tape during a power loss situation without overrun by one of the tape reels and without causing undue stress upon the tape itself. If rotational...
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6239937 |
Adaptive last-track positioning scheme for hard-disk drive formatting
A disk drive manufacturing system and process which includes head to disk interference equipment, servo writing equipment, formatting and controlling firmware. The system servo writes a varying...
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6198590 |
Disk drive employing method of spinning down its spindle motor to reduce the time required for subsequently spinning it up
A disk drive employs a method of operating a spindle motor to respond to a spin-down command to reduce the time required for subsequently responding to a spin-up command. After receiving the...
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6175464 |
Autoreverse mechanism
An auto reverse mechanism in a tape recorder system having a single magnetic head for forward playback (recording) and a single magnetic head for reverse playback (recording), both mounted on a...
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6157153 |
Motor driver
A motor driver has a braking control circuit. The braking control circuit shuts off the supply of an electric current to the coils included in the motor when a motor control signal shifts to a...
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6154334 |
Information recording on a multitrack record carrier
A recording apparatus for a multitrack longitudinally extending record carrier records information by moving forward and reverse along various tracks in successive sub portions of the record...
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6151440 |
Arrangement for segment-by-segment recording of information signals on an intermittently drivable magnetic tape
In an arrangement (1) for the segment-by-segment recording of information signals by at least one rotationally drivable magnetic head (4, 5) in inclined recording tracks (2) on a magnetic tape (3)...
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6145034 |
Method and apparatus for switching data rates during back-up based on computer data and speed
A tape drive method and system for backing up data files from a hard drive to a tape drive or restoring data files to a hard drive from a tape drive. The data transfer rate of the tape drive is...
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6137649 |
Magnetic recording/reproduction apparatus in which one of a reel base pair is rotated to wind a magnetic tape by a predetermined amount when an abnormality is detected
The magnetic recording/reproduction apparatus of this invention records/reproduces information on/from a magnetic tape by drawing out the magnetic tape from a tape cassette and allowing the...
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6128152 |
Method and apparatus for regulating the speed of a tape
In an operational mode in which the tape should come to a stop at predetermined positions, a braking process, which causes the stopping of a tape at an exact predetermined place, is provided. At...
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