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7443624 Method for recording data freshness degrees by a tape drive  
A method for recording data freshness degrees by a tape drive is disclosed. During the recording of a set of data and a data freshness degree associated with the set of data a tape recording...
7440212 Method and systems for a highly error tolerant tape format  
Described herein are media drives for writing information to a media (e.g., a tape media), systems for storing information on a storage medium, and methods of writing information to a media. The...
7440211 Apparatus and/or method of controlling timing of servo pulses and disk drive using the method  
Provided is a method and apparatus for adaptively controlling the timing of servo pulses in a disk drive in consideration of the amount of spindle jitter generated when a disk rotation speed is...
7436610 Disk drive employing different zone boundaries across disk surfaces  
A disk drive is disclosed comprising a plurality of disk surfaces, including first and second disk surfaces. A first physical zone on a first disk surface has a physical zone boundary at a first...
7433143 Adjusting track density by changing slope of spiral tracks used to servo write a disk drive  
A method and apparatus is disclosed for adjusting the track density by changing the slope of spiral tracks used to servo write a disk drive. A target track density is established for a disk...
7433141 Data randomization for rewriting in recording/reproduction apparatus  
A data recording/recovery device ( 20 ) comprises a packet generator ( 34 ) for including recordable information into a packet ( 44 ), the packet initially having a nominal run length limited (RLL)...
7433140 Recording and playback apparatus, recording controlling method, and recording medium  
A recording and playback apparatus includes a recording and playback unit recording a signal on a storage medium and playing back the signal recorded on the storage medium, the recording and...
7426086 Off track write protection for data storage device  
Embodiments of the invention prevent offtrack write that will be caused due to a head vibration in a storage device. In one embodiment, a hard disk drive (HDD) judges approval/disapproval of write...
7423828 Off-track write error recovery  
Method and apparatus for off-track write error recovery. A storage medium is provided with at least first and second tracks, and a write protected status is assigned to the second track to inhibit...
7423827 Systems and methods for accessing data from a variable polarity head assembly  
Various systems and methods for accessing data via a variable polarity head assembly are disclosed herein. As one example, a method for accessing data is disclosed that includes receiving a data...
7417816 Surface analysis test with mixed ECC symbol  
Embodiments of the present invention provide an inspection method for detecting a physical defect of a magnetic disk with high sensitivity without increasing the length of inspection time. In a...
7417814 Magnetic recording device  
A magnetic recording device comprising a magnetic recording medium, a read-write channel for modulating write data, writing it on the magnetic recording medium, reading data from the magnetic...
7415636 Method and apparatus for replacement processing  
A recording-medium controlling apparatus that performs a read-access and a write-access of a recording medium in response to access request from a higher-level apparatus, detects a read error that...
7401250 Recording medium for storing start position information for each zone and method and apparatus of managing data using the information  
A recording medium for storing start position information for each zone, a method of managing data using the information, and an apparatus for recording the information and controlling recording...
7398006 Disc access processor processing a result of accessing a disc and method thereof  
Prior to recording, a difference between a disc's temporal, maximum recordable length and a temporal length having been consumed by recording data is calculated. A scale is determined to allow a...
RE40413 Method and apparatus for developing a dynamic servo signal from data  
Apparatus using information about the extent of errors in sensed data for performing as a control function at least one of adjusting the position of a magnetic head to improve alignment relative to...
7394606 Information storage device and write control circuit  
On writing information to an information recording medium including multiple recording areas having logical addresses assigned thereto, each of the recording areas having information recorded...
7388938 Method for bit-byte synchronization in sampling a data string  
Bit and byte synchronization for sampling and decoding a data string is provided a single data field u. The data string x has pre-pended to it a short string of 1s (ones), followed by u to yield a...
7388525 Decoding device and method, program recording medium, and program using modulation code encoded in accordance with a variable length table  
The present invention relates to a decoding apparatus and method, a program storage medium, and a program, which allow high-performance decoding of a modulation code encoded in accordance with a...
7382559 Recovery processing method for device specific information of medium storage device and medium storage device  
A medium storage device reads device specific information from a medium to a memory and performs read/write operation to the medium, which allows receiving commands from a host even if a read error...
7379256 System and method of rewriting data tracks  
The present disclosure is directed to systems and methods of rewriting defective tracks in a data storage device. In a particular embodiment, the method includes writing a servo pattern on a data...
7376861 Recording medium for storing start position information for each zone and method and apparatus of managing data using the information  
A recording medium for storing start position information for each zone, a method of managing data using the information, and an apparatus for recording the information and controlling recording...
7372652 Correcting errors in disk drive read back signals by iterating with the Reed-Solomon decoder  
A read channel includes a signal receiver that receives a read back signal and a signal detector to detect symbols in the read back signal. The signal detector includes a first detector that...
7372651 Introducing a noise signal into a read-back signal when data is written to a removable data storage medium  
In one exemplary embodiment, a noise signal is introduced into a read-back signal when data is written to a removable data storage medium. While writing the data to the removable data storage...
7369351 Magnetic disk drive and read/write method to reduce read error rate  
Embodiments of the invention reduce the error rate of a read error that is caused by a spacing interval between a write head and a read head, which are formed on a slider. In one embodiment, a...
7369339 Failure prediction method for magnetic disk devices, and a magnetic disk device using the same  
A warning against the possible failure is accurately sent from the magnetic disk device to a host device. In one embodiment, error indices per unit time are stored discontinuously/continuously for...
7362527 Method and apparatus for retrieving data  
A method of retrieving data includes caching data stored in allocation units of a memory ( 102 ), preferably a harddisk drive system, of which retrieval incurs a performance penalty. An example of...
7359134 Data save processing method for disk storage device and disk storage system  
A disk storage device has a plurality of disk faces and a plurality of heads. The disk storage device protects the data on the disk face for a head before the defect of the head occurs. For each...
7355803 Method and apparatus for optimizing hard disc drive and/or recording medium for the same  
A method and apparatus for optimizing a hard disc drive, in which parameters of the hard disc drive are updated by periodically performing a retry of the hard disc drive when the hard disc drive is...
7352629 Systems for continued verification in non-volatile memory write operations  
Temporary lock-out is provided while programming a group of non-volatile memory cells to more accurately program the memory cells. After successfully verifying that the threshold voltage of a...
7345837 Disk drive that refreshes data on portions of a disk based on a number of write operations thereto  
A disk drive includes a rotatable data storage disk, a transducer, an actuator, and a controller. The transducer is configured to read and write data on the disk. The actuator is configured to...
7334165 Signal processing apparatus and a data recording and reproducing apparatus including local memory processor  
In a data recovery processing, the conventional overhead, primarily, latency due to a rotational recording media is removed. Secondary, in a signal processing or in a recording and reproducing...
7333281 Method and apparatus to write and inspect servo information on a disc drive  
A method and an apparatus to write and inspect servo information on a disc drive and minimize an effect on servo information written in adjacent tracks caused by a gap erase field, and write servo...
7330320 Method and apparatus to limit DC-level in coded data  
In a perpendicular magnetic recording system, the data that is being written by the write channel is fed back into the read channel. The read channel processes the data and decides if the written...
7324294 Magnetic recording disk drive with patterned media and circuit for generating timing pulses from the pattern  
A magnetic recording disk drive has a patterned magnetic recording disk with data blocks of magnetizable material separated by nonmagnetic regions, a read head for reading the magnetized data...
7317588 Storage device, data-assurance control device, and data assurance method  
A data reading unit reads inner offset data from an offset reading in an inner direction toward a center of a storage medium and outer offset data from an offset reading in an outer direction...
7307887 Continued verification in non-volatile memory write operations  
Temporary lock-out is provided while programming a group of non-volatile memory cells to more accurately program the memory cells. After successfully verifying that the threshold voltage of a...
7307809 Correlation servo for positioning recording head  
Tape heads and controllers for controlling such heads in a tape drive are described. A controller may determine a first parameter corresponding to the similarity between data read by a first pair...
7304921 Recording control device, recording control method, program and recording system  
To provide a recording control device able to control a data recording so as not to use a defective sector free from a sector test before a shipment thereof, which controls a data recording with...
7298568 Systems and methods for using worf to identify burst patterns for repair  
The misplacement of a servo burst during a servowriting or self-servowriting process can be corrected by erasing and re-writing that burst. In addition, WORF information of a track can be saved in...
7280293 Multi-level mapping of tape error recoveries  
Method and apparatus are provided for presenting various levels of detail about successful error recoveries and background hardware optimizations during the recording and retrieval of digital...
7274524 Correcting errors in disk drive read back signals by iterating with the reed-solomon decoder  
A signal detector to detect symbols in a read back signal. The signal detector includes a first detector to generate raw decisions as a function of the read back signal. A post processor identifies...
7269767 Magnetic disk apparatus, preventive maintenance detection method and program therefor  
The present invention has been made to obtain a magnetic disk apparatus and the like capable of using a patrol region in the magnetic disk to detect a location in need of maintenance in hardware...
7248424 Nonlinearity measuring method, nonlinearity measuring unit, magnetic recording/regenerating unit and LSI for magnetic recording/regenerating  
A nonlinearity measuring method capable of measuring NLTS with a higher precision while taking the state of magnetization inversion of a preceding bit string into consideration. A constitution...
7242546 Determining a location based on a cyclic bit sequence containing consecutively-placed identical bit-groups  
A location within a cycle is determined by reading a portion of a cyclic bit sequence, the bit sequence containing several interspersed bit-group sets that each contain a plurality of series that...
7230781 Information storage system, and a method of operating it  
An information storage system has structure with a head that can effect information transfers with respect to a storage medium. According to one feature, a control portion monitors a characteristic...
7230780 Method, apparatus and program storage device for providing protrusion feedback for a read/write element  
A method, apparatus and program storage device for providing protrusion feedback for a read/write element is disclosed. A slider with a heating element is provided to control the level of...
7228481 Optical disk and method of recording data to the same  
A method of recording data to an area including a defective ECC block of a DVD+RW, and an optical disk written in the recording method are provided. In the method, when data is recorded to an area...
7227708 System and method for determining long-range erasure of adjacent tracks in hard disk drive  
A method for identifying victim tracks distanced from an aggressor track in a hard disk drive that are deleteriously affected by long range fringe effects causing adjacent track interference (ATI)...
7224760 High-speed wide bandwidth data detection circuit  
A high-speed, wide bandwidth data detection circuit includes a phase detection module, a data detection module, a loop filter, and a voltage controlled oscillator. The phase detection module is...
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