Patent application number | Description | Published |
20090168227 | Distributed track identifier on a hard disk drive - A magnetic disk for a hard disk drive comprising a distributed track identifier is described. The disk includes a first portion of a track identifier physically located at a first location on a disk sector and a second portion of the track identifier physically located at a second location on the disk sector wherein the first portion and the second portion of the track identifier are discontinuous on the sector. | 07-02-2009 |
20100050053 | ERROR CONTROL IN A FLASH MEMORY DEVICE - Flash memory devices and associated methods are described for controlling data errors in the devices through various forms of decoding, error correction, and wear concentration. To this end, a flash memory device may be partitioned into a plurality of sectors. Data may then be received from, for example, a host processor for storage within the flash memory device. Storage durations of the data are then estimated and the data is stored in the data sectors based on those estimated storage durations. | 02-25-2010 |
20100235718 | Decoding Techniques for Correcting Errors Using Soft Information - Two levels of error correction decoding are performed using first and second level decoders. A composite code formed by combining an inner component code and an outer component code can be used to decode the data and correct any errors. Performing two level decoding using a composite code allows the size of the inner parity block to be reduced to a single Reed-Solomon symbol while keeping a good code rate. The first level decoder generates soft information. The soft information can indicate a most likely error event for each possible syndrome value of the inner component code. The soft information can also include error metric values for each of the most likely error events. The second level decoder generates corrected syndrome values based on the soft information using the outer component code. The most likely trellis path that corresponds to the corrected syndrome values is then selected. | 09-16-2010 |
20130254619 | Systems and Methods for Mis-Correction Correction 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 mis-correction detection and correction in a data processing system. | 09-26-2013 |
20140022664 | Systems and Methods for Channel Target Based CBD Estimation - Various approaches, methods, systems, circuits and devices for channel bit density estimation. | 01-23-2014 |
20140068358 | Systems and Methods for Non-Zero Syndrome Based Processing - The present invention is related to systems and methods for harmonizing testing and using a storage media. | 03-06-2014 |
20140129890 | Test Pattern Optimization for LDPC Based Flawscan - A method for producing a LDPC encoded test pattern for media in a LDPC based drive system includes adding error detection code data to a predominantly zero bit test pattern and adding additional zero bits to produce a test pattern of a desirable length. The test pattern may then be scrambled to produce a desirable flaw detection test pattern. The flaw detection test pattern may then be encoding with an LDPC code, or other error correction code with minimal disturbance to the run length constraints of the data pattern, and written to a storage medium. | 05-08-2014 |
20140153126 | Systems and Methods for Old Data Inter-track Interference Compensation - Systems and methods for data processing, and more particularly to estimating or calculating interference between tracks on a storage medium. | 06-05-2014 |
20140200849 | DIVERSITY LOOP DETECTOR WITH COMPONENT DETECTOR SWITCHING - Aspects of the disclosure pertain to a system and method for providing component detector switching for a diversity loop detector. Switching between component detectors is performed via one of: a periodic state likelihood reset process, a slope-based switching process, or a cross-over connection process. The joint decision circuit switches among component detectors to promote improved performance with present of constant or transition phase offset. | 07-17-2014 |
20140244926 | Dedicated Memory Structure for Sector Spreading Interleaving - The present disclosure is directed to a method for managing a memory. The method includes the step of receiving data, the data including a plurality of sectors. The method also includes the step of dividing each sector of the plurality of sectors into a plurality of data units. A further step of the method involves interleaving the plurality of data units to yield a plurality of interleaved data units. The method also includes the step of writing the plurality of interleaved data units to a disk. An additional step of the method is to de-spread the plurality of interleaved data units to yield at least one sector of the plurality of sectors. | 08-28-2014 |
20140254041 | Servo Marginalization - Servo channel noise limits are defined through Viterbi decisions based on servo gate signals. Y values are used to produce a first Viterbi decision at each servo gate. Viterbi decisions and Y values are used to produce ideal Y values. Y values and ideal Y values are used to produce an error value which is adjusted by a noise factor based on estimated channel characteristics. The noise value is combined with Y values and used to produce a second Viterbi decision at each servo gate. | 09-11-2014 |
20150055249 | Systems and Methods for Multi-Resolution Data Sensing - Systems and methods relating generally to sensing information, and more particularly to systems and methods for utilizing multiple readers to sense information. | 02-26-2015 |
20150058693 | Systems and Methods for Enhanced Data Encoding and Decoding - Systems and method relating generally to data processing, and more particularly to systems and methods for encoding and decoding information. | 02-26-2015 |
20150062731 | Systems and Methods for Channel Target Based CBD Estimation - Various approaches, methods, systems, circuits and devices for channel bit density estimation. | 03-05-2015 |
20150062732 | Systems and Methods for Two Stage Tone Reduction - Systems and method relating generally to data processing, and more particularly to systems and methods for tone reduction in relation to data transmission. | 03-05-2015 |