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7453663 Disk drives with servo burst patterns radially offset in different radial spokes of a disk and methods of positioning based thereon  
A disk drive includes a rotatable disk, a transducer, an actuator, and a controller. The disk includes a first servo burst pattern in a first radial spoke of the disk, and a second servo burst...
7444467 Storage system having a semiconductor memory device which stores data and parity data permanently  
A storage system, coupled to a host computer, including at least one controller receiving data from the host computer, and a plurality of memory units connected to the controller. The controller...
7443626 Patterned disk medium for vertical magnetic recording, and magnetic disk drive with the medium  
A patterned disk medium includes a disk-shaped flat substrate including a first surface and a second surface located an opposite side of the first surface. First servo pattern areas including...
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...
7443622 Magnetic recording medium, magnetic recording/reproducing apparatus, and stamper for manufacturing the magnetic recording medium  
A reliable magnetic recording medium is provided which comprises a servo signal unit portions formed in a concavo-convex shape, easily produced, and resistant to tracking error. Also provided are a...
7440210 Servo writing a disk drive by writing multi-bit sync marks in spiral tracks for improved servo writing  
A method of writing spiral tracks on a disk of a disk drive is disclosed. The disk drive comprises control circuitry and a head disk assembly (HDA) comprising the disk, an actuator arm, a head...
7436611 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,...
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)...
7428116 Method for a cyclic dibit response estimation in a media system using a data set separator sequence  
A dibit response estimation generator receives a DSS sequence and a DSS readback sequence, which is a function of a channel processing of the DSS sequence by a read channel. The generator generates...
7414803 Write protected magnetic storage media and associated methods  
According to one aspect and example, a method is provided for handling write protected storage devices. The method includes generating a read signal from a portion of a magnetic storage medium and...
7412153 Information recording device and method, and information recording system  
In recording information, an SMPTE 339M-defined UMID buried in video and audio material signals to be recorded to a magnetic tape ( 30 ) or a UMID generated from information other than the material...
7408731 Track allocation method of disk drive  
Embodiments in accordance with the present invention relate to methods wherein a capacity of a disk drive is increased by partially overwriting adjacent tracks to shorten the track width and...
7405893 Data storage medium with optimized servo format  
A data storage medium and data storage system with improved efficiency of formatting are provided. One illustrative embodiment of the present invention pertains to a data storage medium. The data...
7403353 Magnetic recording and reproducing system with recording layer having predetermined convex-concave pattern  
The invention is directed to a magnetic recording/reproducing system wherein each burst pattern in discrete media is configured in a substantially trapezoidal shape (truncated quadrangular pyramid...
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...
7397630 Signal reproducing method and storage apparatus  
A signal reproducing method reproduces servo information recorded on a recording medium by use of a head. A current calculation related to a current and an observer calculation related to a...
7391583 Fault tolerant sync mark detection while servo writing a disk drive from spiral tracks  
A method of writing product servo sectors to a disk of a disk drive is disclosed. The disk comprises a plurality of spiral tracks, wherein each spiral track comprises a high frequency signal...
7388817 Method and apparatus for measuring head gap length of composite head  
After the read head of a composite head reads sector data from a disk, a read circuit detects a sync mark in the sector data. The read circuit demodulates user data subsequent to the detected sync...
7388725 Magnetic recording media, method of manufacturing the same and magnetic recording apparatus  
A magnetic recording media includes a servo region including a preamble region and a burst region and having marks of a magnetic film, and a data region having discrete tracks of the magnetic film....
7387848 Recording media with mechanically patterned landing zone  
A method of manufacturing a magnetic recording medium, comprises steps of providing a non-magnetic substrate for a magnetic medium, the substrate including at least one major surface having a...
7383411 Recording medium for storing start position information for each zone and method of managing data using the information  
A recording medium for storing start position information for each zone and a method of managing data using the information. In a disc having a plurality of zones which form a group, and a spare...
7382568 Circuit and method for detecting a servo wedge on spin-up of a data-storage disk  
A servo circuit includes a servo channel and a processor. The servo channel recovers servo data from servo wedges that identify respective data sectors on a data-storage disk. The processor detects...
7382560 Low power servo mode write driver  
A circuit ( 40 ) for use in a mass data storage device ( 10 ) has first ( 44 ) second ( 46 ) current driver circuits for providing write currents to the data transducer ( 18 ). The first and second...
7379255 Data structure, data storage apparatus and method  
Data stored on a tape in a plurality of data recording sessions employs tape drive apparatus programmed to record the data in accordance with a format specifying a log of tape-usage information....
7379254 Mixed frequency amplitude-based servo pattern  
The invention is directed to a servo frame that includes servo windows written with different frequencies to provide redundant positioning information. The servo frame includes a set of first servo...
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...
7372650 Rotating media storage device having a calibration track with unique calibration servo synch marks  
Disclosed is a rotating media storage device (RMSD) that has at least one calibration track with unique calibration servo synch marks (SSM c s). The RMSD includes a disk that comprises a plurality...
7366887 System and method for loading programs from HDD independent of operating system  
A method for booting into computer memory a non-operating system (O.S.) program from a hard disk drive (HDD) prior to booting into memory an O.S. from the HDD. The method includes establishing a...
7365927 Eccentricity correction data recording method and recording medium having eccentricity correction data  
An eccentricity correction data recording method, a disk-shaped recording medium, a head position control method and an information recording and reproducing apparatus are disclosed for effective...
7362529 Disk drive with variable density data tracks  
A disk drive has multiple disk surfaces and corresponding heads, each disk surface includes multiple regions, and each head is for recording on and playback of information from a corresponding disk...
7362528 Magnetic recording medium  
A data track area and a servo pattern area are formed on a magnetic recording medium by embedding a nonmagnetic material inside concaves in a plurality of types of convex/concave patterns formed of...
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...
7359133 Magnetic recording medium and drive apparatus therefor  
A flexible recording medium, which has a track width in the range of approximately 1-3 μm, capable of facilitating good tracking control. A magnetic pattern bearing servo signals is provided on...
7359132 Equalization preamble region in digital data storage (DDS) format  
A magnetic tape includes plural diagonal tracks, each storing a preamble sequence close to user data such that a transducer for reading the track reads the preamble sequence immediately before...
7355810 Disk drive having a disk medium with discrete track  
According to one embodiment, a disk drive using a disk medium in which servo information is embedding-recorded by a DTR method has a structure wherein a phase-difference servo burst pattern...
7355805 Magnetic tape and method of manufacturing magnetic tape, servo writer, and method of and apparatus for specifying servo band  
Data for specifying servo bands SB 1 to SB 5 is embedded in each servo signal S 1 to S 5 that is written on a plurality of servo bands SB 1 to SB 5 formed on a magnetic tape MT.
7345838 Magnetic recording media and magnetic recording and reproducing apparatus  
The present invention relates to a magnetic recording media including servo zones having magnetic or nonmagnetic patterns which are utilized as servo signals including burst marks of a burst...
7342741 Disk drive with variable track density  
A method of manufacturing a disk drive is disclosed in which servo information is written in tracks on a disk surface, the track width performance of the associated read/write transducer is...
7339761 Method for wedge time shift calibration in a disk drive  
A method is disclosed for identifying wedge time shift zones on a magnetic disk of a disk drive. The disk drive further includes a spindle motor for rotating the disk at an operating speed in...
7336435 Method and system for collecting servo field data from programmable devices in embedded disk controllers  
A servo controller for an embedded disk controller comprises a read channel interface that includes a programmable control logic that receives a servo field detected signal from a module that...
7333290 Magnetic disk in a disk drive and method having improved null servo burst phasing  
Disclosed is a magnetic disk having servo sectors for defining data tracks. Each servo sector includes a preamble field and a null servo burst field. The preamble field is for synchronizing a...
7330417 Storage device having superset format, method and system for use therewith  
A storage device comprising a storage medium having a plurality of sectors and a superset format. Each sector includes a header, a data section and a trailer, the data section sized to contain a...
7330323 Disk drive determining a head-switch preheat period used to format a disk  
A disk drive is disclosed comprising a disk having a plurality of tracks, wherein each track comprises a plurality of data sectors. The disk drive further comprises a plurality of heads, such as a...
7330322 Utilizing a combination of physical tracks and virtual tracks to store data on a data storage medium  
A data storage system and a method for storing data in a data storage system are provided. The data storage system includes a data storage medium that has at least one physical track that stores at...
7330321 Reference magnetic signal recording device and method of manufacturing the same  
A method of simultaneously recording multiple reference magnetic signals by using a magnetic head having multiple recording portions is provided. A writing yoke formed of a ferromagnetic material...
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...
7319569 Servo writer  
A servo writer is provided, which applies DC magnetization to a zone of a magnetic tape that is in advance subjected to AC erasing and writes a servo signal onto the DC magnetized zone. The servo...
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