Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Application No. | Application Title | Issue Date |
| 20120033321 | TAPE LAYOUT DESIGN FOR RELIABLE ECC DECODING A method for physically laying out data on tape is disclosed herein. In one embodiment, such a method includes receiving a data set, wherein the data set includes S sub data sets (SDSs) of fixed size and each SDS includes N codeword interleaves (CWIs). The method furthe... | 02/09/2012 |
| 20120002317 | WRITING DATA TO TAPE MEDIUM In a controller of a tape drive, a CM input-output unit recognizes a tape format; a tape variable acquisition unit acquires tape variables; a setting variable acquisition unit acquires setting variables; and a minimum number calculator calculates a minimum number m of s... | 01/05/2012 |
| 20110317304 | MAGNETIC RECORDING/REPRODUCTION DEVICE AND MAGNETIC RECORDING MEDIUM Disclosed is a magnetic recording/reproduction device 2 including: a recording/reproduction head 7; and a recording/reproduction head 7 for detecting a leakage magnetic field of each of the plurality of magnetic recording cells 1 so as to rep... | 12/29/2011 |
| 20110304936 | DATA DEMODULATING DEVICE, DATA DEMODULATING METHOD, AND PROGRAM A data demodulating device which converts an RLL code string obtained by converting a data string in which information bits including a special bit having a value representing the content of a signal process at the time of demodulating data within a target section inclu... | 12/15/2011 |
| 20110304935 | FLOATING GUARD BAND FOR SHINGLE MAGNETIC RECORDING A hard disk drive that includes a disk with data written onto a plurality of tracks, a spindle motor that rotates the disk, and a head that is coupled to the disk. The disk drive also includes a circuit that writes data onto a first writable shingle band of tracks if th... | 12/15/2011 |
| 20110181977 | METHOD OF WRITING SERVO PATTERN TO DISK OF A HARD DISK DRIVE AND HARD DISK DRIVE CONFIGURED TO PERFORM THE METHOD A method of writing a servo pattern of a hard disk drive includes measuring the speed of a head of the hard disk drive by reading a basic servo pattern written to only select ones of the data tracks of the disk, realizing a feedforward current profile when the differenc... | 07/28/2011 |
| 20110176237 | MAGNETIC TAPE SERVO FORMAT ALLOWING FOR INCREASED LINEAR TAPE DENSITY AND SYSTEMS THEREOF According to one embodiment, a magnetic recording tape includes a plurality of servo tracks, each servo track comprising a series of magnetically defined bars having an average height of between about 80 microns and about 120 microns, wherein an average stripe angle of ... | 07/21/2011 |
| 20110170213 | MAGNETIC RECORDING MEDIUM, MAGNETIC RECORDING APPARATUS EQUIPPED WITH THE MAGNETIC RECORDING MEDIUM, AND TRANSFER MASTER CARRIER A burst included in a burst pattern of a magnetic recording medium is a rectangular region. The rectangular region is constituted by a first signal region formed across a plurality of data tracks and is of a shape in which the length in the down track direction graduall... | 07/14/2011 |
| 20110116183 | Recording control device and recording control method A recording control device includes a recording unit, and generates a conversion rule by determining the number of divisions into which the total number of sectors is to be divided, an area to which data is to be moved, and a start position of a sector, based on a key r... | 05/19/2011 |
| 20110096430 | Converting Timing Errors into Symbol Errors to Handle Write Mis-Synchronization in Bit-Patterned Media Recording Systems A method includes writing data to a bit-patterned media at times determined by a clock having a period that is offset from a bit island period by a fixed offset to create one insertion or one deletion approximately within a predetermined number of bit islands, reading t... | 04/28/2011 |
| 20110090583 | MAGNETIC RECORDING APPARATUS AND MAGNETIC RECORDING MEDIUM According to one embodiment, a magnetic recording apparatus includes: an information recording module configured to record a predetermined number of lines of information with a predetermined length in an information recording region of a magnetic recording medium, each ... | 04/21/2011 |
| 20110085259 | METHOD FOR SETTING ZONE FORMAT OF A DISK FOR STORING DATA AND DISK DRIVE A method for dividing a data area on a disk into a plurality of concentric zones and determining a format for each zone so that data tracks in the zone have the same number of data sectors. The method includes dividing a data area into a plurality of zones with provisio... | 04/14/2011 |
| 20110080668 | CLOSELY COUPLED VECTOR SEQUENCERS FOR A READ CHANNEL PIPELINE A system and method involving a read channel pipeline having a plurality of vector sequencers that may be used to control the processing blocks. In one embodiment, a read channel pipeline may include processing blocks that may be controlled a command word provided by ve... | 04/07/2011 |
| 20110075289 | HIGH-RATE TRANSITION CONTROL CODE FOR MAGNETIC RECORDING CHANNELS A method and apparatus for reducing noise in a communication signal is provided. The method includes converting raw channel data from the communication signal to a sequence of transition code symbols, each symbol having a plurality of bits, each bit having a position wi... | 03/31/2011 |
| 20110051275 | COMPUTER SYSTEM, DISK STORAGE DEVICE AND METHOD OF CONTROLLING THE SAME A computer system, a disk storage device and a method of controlling the same reads data by a reading size from a disk storage unit in which the data is stored according to a request of an application for reading data. The data is divided from the reading size into a si... | 03/03/2011 |
| 20110038072 | BPM RECORDING WITH MORE THAN ONE DOT PER BIT Data storage systems are provided. Data storage systems illustratively include a recording head having a writing element and a bit patterned medium having a plurality of media dots. In some embodiments, the plurality of media dots pass the recording head at a media dot ... | 02/17/2011 |
| 20110026155 | PATTERNED-MEDIA MAGNETIC RECORDING DISK WITH CRYPTOGRAPHICALLY SCRAMBLED PATTERNS AND DISK DRIVE OPERABLE WITH THE DISK Patterned-media magnetic recording disks are made from a master template that has nondata regions that contain a pattern of one or more discrete nondata islands and discrete gaps, with the pattern representing a scrambled number. All disks made from the master template,... | 02/03/2011 |
| 20110007415 | METHOD AND APPARATUS FOR DETECTING SYNC DATA OF READ DATA IN A DISK DRIVE According to one embodiment, a disk drive is provided, which starts reading data at the head thereof, when a sync mark is detected. The disk drive has a read channel that generates a forced SM detection signal if the sync mark cannot be detected because of the occurrenc... | 01/13/2011 |
| 20100271727 | METHOD AND APPARATUS FOR PRESERVING DATA OF A HARD DISK DRIVE A method is disclosed for preserving data in a hard disk drive, in which data loss due to adjacent track erase (ATE) phenomenon can be minimized by relocating data, which is written in a zone where the ATE phenomenon is likely to occur since frequency of use is high, to... | 10/28/2010 |
| 20100265612 | LATERAL PARTITIONING FOR A SHINGLED TAPE FORMAT Various embodiments for writing data in a tape medium having wraps by a tape drive are provided. The tape drive allocates the wraps in a shingled data band between two or more data partitions. A set of contiguous wraps is allocated to one data partition of the two or mo... | 10/21/2010 |
| 20100232047 | DATA INTERLEAVING IN TAPE DRIVES Methods and apparatus for interleaving data in a multitrack tape drive and for writing data on a multitrack tape in the tape drive. One method includes: partitioning the data into m(2n+k) data blocks, where each data block has a logical array of rows and colu... | 09/16/2010 |
| 20100232048 | DISK STORAGE DEVICE According to one embodiment, a disk storage device includes: a controller configured to write data pieces stored in a buffer memory to a disk medium by a physical sector size which is an integer multiple of a unit logical block, wherein the controller is configured to d... | 09/16/2010 |
| 20100208377 | Systems and Methods for Inter-Location Control of Storage Access Various embodiments of the present invention provide systems and methods for controlling access to a magnetic storage medium. As one example, a method for controlling access to a magnetic storage medium is disclosed that includes providing a location count indicating a ... | 08/19/2010 |
| 20100195237 | MAGNETIC RECORDING MEDIUM, RECORDING/REPRODUCING APPARATUS, AND STAMPER A magnetic recording medium has data track patterns formed by concave/convex patterns in data recording regions on at least one surface of a substrate and servo patterns formed by concave/convex patterns in servo pattern regions between the data recording regions. The c... | 08/05/2010 |
| 20100177424 | RECORDING MULTIPLE CODEWORD SETS DURING LATENCY PERIOD Writing data to magnetic tape is performed by receiving data from a host, establishing sub data sets, computing C1 and C2 ECC, forming Codeword Quad sets, writing a beginning Data Set Separator to a magnetic tape, writing a plurality of contiguous instance... | 07/15/2010 |
| 20100177425 | MAGNETIC RECORDING MEDIUM, MANUFACTURING METHOD THEREOF, AND MAGNETIC RECORDING/REPRODUCING APPARATUS A magnetic recording medium has a RAM region and a ROM region. The RAM region includes a plurality of first tracks each having a first magnetic portion. The first magnetic portions in adjacent tracks are separated from each other. The ROM region includes a plurality of ... | 07/15/2010 |
| 20100172048 | Servo patterns for patterned media Servo patterns for patterned media. The servo pattern includes specification of cylinder/track ID with and without a Gray code. The servo pattern space is minimized by the optimum usage of the islands. This is achieved by island allocation rules to take advantage of non... | 07/08/2010 |
| 20100165496 | SYSTEM, METHOD AND APPARATUS FOR SECTOR GRADING OF DEFECTIVE BIT PATTERNED MAGNETIC MEDIA IN HARD DISK DRIVES A system for grading defective bit patterned magnetic media by disk sector in hard disk drives recovers a portion of any defective sectors at a lower areal density. The invention reduces the track pitch density for sectors containing amalgamated islands while leaving th... | 07/01/2010 |
| 20100142076 | PATTERNED-MEDIA MAGNETIC RECORDING DISK WITH CRYPTOGRAPHICALLY SCRAMBLED PATTERNS AND DISK DRIVE OPERABLE WITH THE DISK Patterned-media magnetic recording disks are made from a master template that has nondata regions that contain a pattern of one or more discrete nondata islands and discrete gaps, with the pattern representing a scrambled number. All disks made from the master template,... | 06/10/2010 |
| 20100142077 | MAGNETIC RECORDING/REPRODUCING USING A PATTERNED MEDIUM To synchronize a write/read frequency with media with high precision even when a write head is positioned in a different zone in a magnetic recording/reproducing device equipped with patterned media formed with writing hit patterns and having a zoned format function, a ... | 06/10/2010 |
| 20090310240 | CODING TECHNIQUE FOR CORRECTING MEDIA DEFECT-RELATED ERRORS AND RANDOM ERRORS A method of writing data on a storage medium that takes into account a condition of the storage medium. The method includes receiving data to be written on a portion of a storage medium and encoding the data based on a condition of the portion of the storage medium. The... | 12/17/2009 |
| 20090180208 | Application specific processor based disk formatter A disk formatter in a disk drive having a main control processor for performing functions relating to transfer of data between a host and at least one disk medium, includes a processor for obtaining sector information of a target sector on the disk medium and issuing co... | 07/16/2009 |
| 20090180209 | INFORMATION RECORDING MEDIUM ACCESS DEVICE, AND DATA RECORDING METHOD When moving image data or the like is recorded into an information recording medium, such as a flash memory, in real time, an influence of locations of free recording areas upon the recording speed is suppressed to ensure the real time performance of the data recording.... | 07/16/2009 |
| 20090080100 | Disk drive device and method for determining data track format of the disk drive device Embodiments of the present invention help to improve the capacity and the performance of a disk drive device. According to one embodiment, a data track pitch is set to each recording surface. The recording surfaces are divided into bands. A hard disk drive (HDD) sequent... | 03/26/2009 |
| 20090073595 | METHOD AND APPARATUS FOR EDITING MASS MULTIMEDIA DATA A method and apparatus for editing multimedia data stored in a disk. The method generates a Block Allocation Table (BAT) in the disk, wherein the BAT records a connection relationship between each of blocks based on a connection relationship between each of data stored ... | 03/19/2009 |
| 20090067078 | BIT PATTERNED MEDIUM, READING HEAD FOR READING DATA RECORDED ON BIT PATTERNED MEDIUM, AND HARD DISK DRIVE FOR RECORDING/READING DATA ON/FROM BIT PATTERNED MEDIUM Provided are a bit patterned medium having a super track, a reading head which reads data recorded on the bit-patterned medium, and a hard disk drive (HDD) for recording/reading data on/from the bit patterned medium. The bit patterned medium includes a substrate, and a ... | 03/12/2009 |
| 20090059409 | Magnetic recording reproducing apparatus The magnetic recording and reproducing apparatus includes: a perpendicular recording magnetic recording medium including a track pattern including track portions and gap portions arranged so as to be alternately adjacent to each other in a cross-track direction, at leas... | 03/05/2009 |
| 20090046386 | DATA FORMATTING IN DATA STORAGE A method of processing data comprising arranging data into a data group comprising a plurality of sub groups each said subgroup comprising a plurality of columns; for each column, determining at least one checksum data of said column; and for each column, storing the ch... | 02/19/2009 |
| 20090040641 | METHOD AND APPARATUS FOR PHASE-SHIFT NULL-BURST-PATTERN A media includes a plurality of tracks, a preamble portion including a set of signals, a first servo burst having a first plurality of signals written substantially in phase with the preamble portion, and a second servo burst written out of phase with the preamble and t... | 02/12/2009 |
| 20090021854 | Method of servo writing for magnetic recording system, magnetic recording system In a method of servo writing of a magnetic recording system and the magnetic recording system, the signal is recorded in a dummy area with a higher recording density than the burst signal. Also, the maximum bit length of the burst area is shortened as compared with the ... | 01/22/2009 |
