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9042045 Disk drive adjusting a defect threshold when scanning for defective sectors  
A disk drive is disclosed including a disk having a plurality of sectors, and a head actuated over the disk. A defect threshold is initialized, and a first sector is read to generate a first read...
9036284 Isolated shingled bands of fractional tracks  
Systems and methods are disclosed for isolated bands of fractional tracks in data storage devices, particularly devices employing shingled magnetic recording. In one embodiment, a device may...
9030771 Compressed data verification  
A media drive includes drive side circuitry that, in response to a request to validate compressed data read from media, validates packets of the compressed data while compressed and, in response...
9030772 Variable data density for data storage  
Disclosed herein are methods and apparatuses that provide for variable data density on a disc data storage medium, where the variable data density may have a circumferential definition and a...
9025264 Methods for measuring media performance associated with adjacent track interference  
Methods for measuring media performance associated with adjacent track interference are provided. One such method includes iteratively writing data to a target track for each of a plurality of n...
9025267 Data storage device using branch metric from adjacent track to compensate for inter-track interference  
A data storage device is disclosed comprising a disk comprising a plurality of data tracks, and a head comprising a first read element and a second read element. A first data track is read using...
9019640 Read channel throughput management  
An implementation of a system disclosed herein provides a method of deferring decoding of a data sector received at a read channel of a storage device, in response to determining that a data...
9019639 Hierarchical control of tiered error recovery for storage devices  
A computer program product includes a computer readable storage medium having computer readable program code embodied therewith, the computer readable program code being executable by a processing...
9013820 Method of reducing thermal stress within a magnetic head  
Devices and methods for reducing thermal stress within a head of a storage device are disclosed. In one or more embodiments, a method includes writing a selected pattern to a storage medium of a...
9007709 Optimum tape layout selection for improved error correction capability  
According to one embodiment, a system for selecting an optimum tape layout to store data on a tape medium may include a processor and logic integrated with and/or executable by the processor, the...
9007711 Sequential-access of storage media  
The present disclosure describes apparatuses and techniques of improved sequential-access of storage media. In some aspects an indication that a storage media interface failed to access a block of...
9001445 Multiple sync mark storage system  
A data processing system includes a number of analog to digital converters operable to sample analog signals obtained from a magnetic storage medium to yield digital signals, multiple sync mark...
8995074 Read channel optimization using evolutionary algorithms  
The present disclosure includes systems and techniques relating to the use of evolutionary algorithms for tuning the performance of read channels. Instructions encoded on a medium are performed by...
8988799 Magnetic disk device and control method of magnetic disk  
According to one embodiment, any of a first process to perform a write retry to a write target track, a second process to perform the write retry and perform reading for data verification to an...
8988807 Disk drive with different data sector integrated preambles in adjacent data tracks  
A hard disk drive has disks with data sector preambles that allow for inter-track interference. The same data sector preamble is used for all data sectors in a track but the preamble in each track...
8988810 Track measurement for data storage device  
Track placement on a disk of a Data Storage Device (DSD) including writing test data in a plurality of sectors in a test track on the disk. An adjacent track on the disk is written offset from the...
8976477 System and method for generating soft-orthogonal syncmarks  
The disclosure is directed to a system and method of generating soft-orthogonal syncmarks for at least a first set of tracks and a second set of tracks. Random pairs of sync patterns are searched...
8976478 Band rewrites based on error scan counts  
Systems and methods are disclosed for performing band rewrites on shingled storage media based on error scan counts. In one embodiment, a device may comprise a data storage medium including a...
8970976 Systems and methods for data dependent inter-track interference cancellation  
Systems, methods, devices, circuits for data processing, and more particularly to systems and methods for reducing inter-track interference in relation to processing data retrieved from a storage...
8947815 Disk storage apparatus and data storage method  
According to one embodiment, a disk storage apparatus includes a disk, a detector, and a controller. The disk includes a first recording area for recording with a first track density, and a second...
8947812 Data storage device comprising equalizer filter and inter-track interference filter  
A data storage device is disclosed comprising a head actuated over a disk. A read signal from the head is sampled to generate signal samples, and the signal samples are filtered with an equalizer...
8941935 System and method for initiating refresh operations  
A magnetic storage system includes a magnetic storage medium, a random-access memory (RAM), and a controller. The controller interfaces with both the magnetic storage medium and the RAM, and...
8937780 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...
8934185 Storage device head instability recovery by heating from head heater  
Technologies are described herein for recovering an instable head in a storage device using an internal head heater. An instability in the reader head may be detected, and, in response to...
8929014 Tape header protection scheme for use in a tape storage subsystem  
In one embodiment, a system for integrating data and header protection in tape recording includes a processor and logic adapted to: provide a data array organized in rows and columns, each row of...
8929009 Irregular low density parity check decoder with low syndrome error handling  
A data processing system is disclosed including a data decoder circuit, an error handling circuit and a syndrome checker circuit. The data decoder circuit is operable to apply a data decode...
8917469 Disk drive correcting an error in a detected gray code  
A disk drive is disclosed comprising a head actuated over a disk comprising a plurality of tracks defined by a plurality of servo sectors. An estimated track ID is generated and a plurality of...
8917466 Systems and methods for governing in-flight data sets in a data processing system  
The present inventions are related to systems and methods for data processing, and more particularly to systems and methods for governing a data processing system.
8917467 Systems and methods for ATI mitigation  
Systems, methods, devices, circuits for data processing, and more particularly to data processing including adjacent track interference mitigation.
8908307 Systems and methods for hard disk drive region based data encoding  
Systems and method relating generally to improving usage of storage area on a disk drive, and more particularly to systems and methods for applying encoding based upon the nature of a particular...
8902530 Decision directed and non-decision directed low frequency noise cancelation in turbo detection  
A set of decisions is determined based at last in part on a set of samples. For a given sample in the set of samples, a low frequency noise estimate is estimated based at least in part on (1) at...
8902532 Write avoidance areas around bad blocks on a hard disk drive platter  
A method and computer program product identify the location of a bad block on a disk platter of a hard disk drive, determine an avoidance area extending from the bad block, and prevent data from...
8902534 Implementing track following using data characteristics for positional information  
A method, apparatus and a data storage device are provided for implementing track following and data recovery with readback of shingled data written in overlapping shingled data tracks on a...
8891191 Data storage device initializing read signal gain to detect servo seed pattern  
A data storage device is disclosed comprising a disk comprising at least one servo seed pattern, and a head actuated over the disk. An amplitude measurement is generated based on a read signal...
8891195 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...
8884795 Reception device and reception method  
A reception device and corresponding method for maintaining a high dynamic range of an AD converter circuit and preventing excessive input to the AD converter circuit is disclosed. For example, a...
8885277 Modulation coding for two-dimensional recording  
Technologies are described herein for implementing modulation coding schemes for TDMR. A data sequence is received to be stored on a first data track of a recording media. The first data sequence...
8885283 Disk drive adjusting write block size based on detected vibration  
A disk drive is disclosed comprising a head actuated over a disk having a plurality of data tracks. A vibration is detected, and a write operation is configured to write a first plurality of...
8879195 Logical block protection for tape interchange  
A two part process is used for modifying records to be written and retrieved from tape devices. A record is appended with a cyclic redundancy check and a string of zeros. Submitting the entire...
8879186 Fast flaw scan for multiple sensor systems  
A method for performing parallel flaw scans of a plurality of tracks of a storage device. The storage device includes at least one disk, at least two read sensors, at least two analog front ends,...
8873179 Bit-patterned media magnetic recording disk with two sizes of dots and imprint template made with directed self-assembly (DSA) of block copolymers  
A bit-patterned media (BPM) magnetic recording disk has two sizes of dots of magnetic material. The large and small dots are formed together in a hexagonal-close-packed (HCP) pattern. In the data...
8873182 Multi-path data processing system  
Various embodiments of the present invention provide apparatuses and methods for processing data in a multi-path data processing circuit. For example, an apparatus is disclosed that includes a...
8861107 Systems and methods for burst demodulation  
A data processing circuit with flaw robust burst field demodulation includes a burst integration circuit operable to calculate burst integration results for a servo data burst field, a comparison...
8861111 Two dimensional magnetic recording servo system phase alignment  
A servo system includes a first equalizer circuit operable to filter digital servo data samples derived from a first read head to yield first equalized data, a second equalizer circuit operable to...
8861112 Two dimensional magnetic recording system head separation estimator  
An apparatus for estimating head separation in an array reader magnetic recording system includes an array reader with multiple read heads operable to read data from a magnetic storage medium, a...
8854759 Combined soft detection/soft decoding in tape drive storage channels  
In one embodiment, a tape drive system includes a soft detector for executing a first forward loop of a detection algorithm on a first block of signal samples during a first time interval; and...
8854760 Systems and methods for preventing adjacent track erasure  
A data processing circuit includes a subtraction circuit operable to subtract an ideal version of a data pattern from a sampled version of a data pattern to yield a difference signal, an error...
8854756 Systems and methods for mitigating data interference in a contact signal  
The present inventions are related to systems and methods for determining contact between two elements, and more particularly to systems and methods for determining contact between a head assembly...
8854758 Track defect map for a disk drive data storage system  
A method and apparatus for storing a disk drive media defect table or list. Defect table entries for a subject disk track are stored on the subject track and retrieved for determining defective...
8848304 Methods and apparatus for improved detection of servo sector data using single bit error correction  
Methods and apparatus are provided for improved detection of servo sector data in a magnetic recording system using single bit error correction. Servo sector data is processed by detecting the...