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8917464 |
Utilization of disk buffer for background replication processes
Embodiments of the present invention utilize a hard disk drive buffer to minimize seek delays during background replication of a first volume and fulfillment of application input/output requests.... |
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8837074 |
Method and system for compensating for track squeeze
A storage device includes a storage medium having a plurality of tracks of data. Reading apparatus for reading a current track of data that has been subject to previous encroachment to an extent... |
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8625228 |
***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST***
Method and system for compensating for track squeeze
A storage device includes a storage medium having a plurality of tracks of data. Reading apparatus for reading a current track of data that has been subject to previous encroachment to an extent... |
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8611032 |
Directional write retry for shingled disk drive application
Embodiments described herein include systems and methods for correcting for errors caused by disturbances to disk drives, such as disturbances due to shocks or vibrations incident on the drive.... |
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8589774 |
Averaging signals to improve signal interpretation
Systems and techniques to interpret signals on a noisy channel are described. A described technique includes storing a group of signals including a filtered digital signal and one or more previous... |
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8531793 |
Disk drive with variable incremented counting of writes to the data tracks for minimizing the effect of far track erasure
A hard disk drive (HDD) minimizes the effects of far track erasure (FTE) by counting the number of writes to the data tracks and incrementing counters based on the known effect of FTE on each... |
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7881164 |
Sync mark detection with polarity uncertainty
Systems and methods for detecting a disk sync mark are provided. The systems and methods for detecting the disk sync mark rely on a detecting the disk sync mark on at least one timing interval. A... |
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7031085 |
Version tracking of disk write operations
The present invention is a disc drive storage unit incorporating novel apparatus, data structure and method for uniquely identifying data written during each write command operation of the disc... |
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6995936 |
Information recording apparatus and information recording method
An information recording apparatus for recording content information on an information recording medium includes a main information recording area on which main information to be reproduced is... |
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6980385 |
Apparatus for information recording and reproducing
In order to generate a sampling clock having a higher accuracy, a synchronous signal generating circuit is provided with a phase error detector, detecting a phase error of a read out signal... |
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6903887 |
Multiple level (ML), integrated sector format (ISF), error correction code (ECC) encoding and decoding processes for data storage or communication devices and systems
A method and an apparatus encodes and decodes blocks having a predetermined number of sectors of data bytes to detect and correct data bytes in error in each sector of a block. The method and the... |
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6683738 |
Storage device for reliably maintaining data in a reproducible state for a long period of time
A time counting device, a cache memory and a copy control circuit are added to a conventional disk drive so that recorded information is copied periodically and automatically. Alternatively, a... |
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6347353 |
Information medium having digital signals recorded thereon
An information medium having digital signals recorded therein includes a disk having first and second recording surfaces. The digital signals are in the form of a data frame including a lead-in... |
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6266201 |
Multiple channel rewrite system
In a data recording system utilizing multiple channels and data blocks wherein the data blocks are read subsequent to being written so as to check for errors, the data blocks are rewritten... |
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6154806 |
Method for recording digital signals on multiple-layered disks
A method of recording digital signals on a disk having at least a first recording surface and a second recording surface. The digital signals are in the form of a data frame including a lead-in... |
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6151580 |
Audio playback apparatus
An audio playback apparatus for an input data stream (d0) delivered by an audio data source (1) in a standardized data format (F1) is disclosed comprising an input decoder (2) for forming a first... |
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5995306 |
Handling defective frames on hard sectored magnetic tape
Method and apparatus are provided for re-recording of a frame on magnetic tape (22) when a first recording of the frame is determined to be defective. A frame whose first recording is defective is... |
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5926334 |
Noise reduction system for an audio system
An input signal from an audio system is divided into a plurality of frequency bands, and the signal in each frequency band is attenuated by an attenuator. The output signals of the attenuators are... |
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5909334 |
Verifying write operations in a magnetic disk drive
A method and apparatus for verifying that data written on magnetic disk media can be successfully recovered in subsequent read operations and ensuring that the data to be written is held by a... |
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5909329 |
High-speed video printer with tracking adjustment of slave tape
A video printer for printing a magnetic pattern of a master tape on a slave tape comprises a read head for reading a control signal printed on the slave tape, a phase shift circuit for shifting a... |
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5617264 |
Method and apparatus for rewriting data to a floppy disk by storing reproduced data in a memory
A method and apparatus of reproducing and recording data stored in a plurality of tracks of a memory. A recording and reproducing head reproduces data from at least one of a plurality of tracks of... |
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5612829 |
Data recording control method of magnetic tape
The present invention pertains to a data recording control method of a magnetic tape in which tape a data, constructed by combining a plurality of packets into physical blocks, is recorded, the... |
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5485606 |
System and method for storing and retrieving files for archival purposes
A system and method for backing-up, or storing, user-created files to a magnetic tape, or the like, and for subsequently retrieving, or restoring, selected files. Files that are backed-up... |
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5371634 |
Arrangement for obtaining prerecorded digital music cassettes
An arrangement for reading a digital audio signal from a master medium (7) and storing it in a digital storage medium (10, 90, 90') at a first bit rate in a first step, and for repeatedly reading... |
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5173815 |
Recording position compensation circuit for use in digital information recording-reproduction apparatus
A recording position compensation circuit for use in the digital information recording-reproduction apparatus of the present disclosure has a microprocessor for generating an offset signal... |
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5142422 |
Dual channel helical recorder
A dual channel helical scan recording system (30) includes a rotating dum (36) having sets of heads (W1, W2) (R1, R2) mounted on its peripheral surface (56). A set of write heads (W1, W2) is... |
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5075804 |
Management of defect areas in recording media
An improved method of managing media defects in disk drives keeps an operating list of the tracks in the disk drive, and for each track enters on the list the number of good sectors (i.e., those... |
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4935825 |
Cylinder defect management system for data storage system
A system for managing data errors and media defects on magnetically and optically encoded disks. The invention is a disk controller utilizing a cylinder-based defect management system that reduces... |
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4825306 |
Video translation system for translating a binary coded data signal into a video signal and vice-versa
The binary coded data signal is divided into data blocks in the video translation system in accordance with the invention. n copies are made of each data block. Televison synchronization signals... |
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4718074 |
Dejitterizer method and apparatus
Dejitterizer apparatus is disclosed which uses a counter to track the number of bits stored in a 64-bit FIFO buffer. The counter is incremented on a falling edge of pulses of a timing pulse... |
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4620243 |
Disk drive incremental rewrite
A transducer head on a disk drive apparatus is offset about an expected center of a data track as indicated by servo information not included in the data track. If data does not have a... |
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4559568 |
Apparatus for re-recording a digital signal on a record medium and for reproducing the same therefrom
An apparatus for re-recording a new digital signal in a track on a magnetic record medium which has a previously recorded digital signal in the track, the digital signal being arranged in data... |
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4405952 |
Apparatus for detecting faulty sectors and for allocating replacement sectors in a magnetic disc memory
Each face of a magnetic disc memory is divided into sectors of a circle and into concentric tracks on which are recorded or from which are recovered binary data transferred between a central... |
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4353129 |
Digital data transmission system
A digital data transmission system comprises a transmitter and a receiver, said transmitter comprising storage means for temporarily storing a data bit string forming a coded digital video signal,... |
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4016547 |
Mos shift register compensation system for defective tracks of drum storage system
Loss of a magnetic track on a rotating drum memory is compensated for by a erially connected shift register. Since replacement of an entire magnetic drum is a costly venture, it usually is not... |
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3945035 |
Method and means for filtering and amplifying signal components of desired frequency
A method and means for filtering and intensifying signal components of a desired predetermined period of repetition wherein a plurality of recording heads in tandem arrangement are provided,... |
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3935593 |
Multi-media production programmer
Novel equipment utilizing a single head, single gap on a single track in an audio magnetic recorder to permit control of a large variety of audio-visual devices for the pre-programming of a... |
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3890640 |
Step driven magnetic recording and reproducing apparatus
A magnetic recording and reproducing apparatus of the type in which a magnetic tape is steppingly driven by a driving system for recording information intermittently, having a first and a second... |
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3787827 |
REAL TIME DATA COMPRESSION SYSTEM
A real time data compression recording system particularly adapted for use in recording randomly-generated analog data. The system preferably comprises an endless loop tape transport system having... |
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3770903 |
IMAGE DATA RATE CONVERTER HAVING A DRUM WITH A FIXED HEAD AND A ROTATABLE HEAD
A data-rate converter is disclosed comprising a rotatable data-storing drum with at least one fixed read/record head and a rotatable read/record head. The latter is rotatable in a circular path... |
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3668665 |
APPARATUS FOR ENSURING TIMING TRACK ACCURACY
A method and apparatus for precisely checking the accuracy of the placing of timing track marks or bits on the periphery of a rotating recording member, such as a magnetic disc or drum, where the... |
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3665429 |
RECORDED SIGNAL ENHANCING APPARATUS AND METHOD
Previously recorded magnetizable spot indicia carried on a magnetic surface medium, are each repeatedly accessed for reading by a magnetic head transducer by relative motion of the surface and the... |
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3653012 |
MAGNETIC HEAD WITH GAPS SPACED AS A FUNCTION OF THE DISTANCE BETWEEN RECORDED LINES OF INFORMATION
An apparatus for the magnetic recording of gradient information wherein a magnetic gradient of given length is reproduced on a magnetic medium. A readout magnetic head is provided for sensing the... |
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3582916 |
PULSE DELAY ARRANGEMENT
A pulse or signal delay arrangement in which a number of magnetizable elements are arranged about a rotating member or drum. The magnetizable elements are situated on the surface of the member or... |
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3540022 |
ROTATING MEMORY CLOCK RECORDER
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3532834 |
SPEECH GATE
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3531787 |
AUTOMATIC MAGNETIC DRUM CLOCK TRACK RECORDER
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3480932 |
ANALOG SPECTRUM ACCUMULATOR
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3480931 |
BUFFER DATA STORAGE SYSTEM USING A CYCLICAL MEMORY
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3474427 |
DATA STORAGE SYSTEM
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