Class / Patent application number | Description | Number of patent applications / Date published |
360061000 | Signal switching | 19 |
20080239543 | METHODS AND APPARATUS FOR GENERATING A HARD DRIVE WRITE SIGNAL - Methods and apparatus for generating a hard drive write signal are here in disclosed. A disclosed method comprises generating a hard drive write signal on an output of a switch based on an edge of the first control signal and reducing the hard drive write signal based on an edge of a second control signal via a second switch. | 10-02-2008 |
20090097149 | METHOD AND APPARATUS FOR CONTROLLING DATA RATE OF A TAPE DRIVE - A method for controlling data rate of a tape drive is disclosed. The tape drive is connected to a computer system. The tape drive stores data by dividing the data into multiple codeword quads (CQs). A local memory within the tape drive includes drive to iteratively monitor data rate during write operations. If a number of CQ skips exceeds a pre-defined threshold value, the drive code reduces a maximum allowable data rate of the tape drive. | 04-16-2009 |
20110216436 | INFORMATION RECORDING DEVICE - Excellent magnetization switching of a magnetic recording medium is promoted in microwave assisted magnetic recording to provide a highly-reliable high-density information recording device. A receded section from an air bearing surface is arranged at an end section in a write track width direction on an FGL laminate film for generating a high-frequency field. Alternatively, a cross section of the FGL laminate film (plane perpendicular to the direction of the flow of the electric current) has an inverted trapezoid shape or has a structure in which the area of the cross section increases with distance from the main pole. Since an excellent recording pattern is formed on the recording medium, areal recording density in the information recording device can be increased, and the reliability can be improved at the same time. As a result, the cost can be reduced. | 09-08-2011 |
20120014014 | DATA RECORDING AND READING DEVICE AND METHOD - Provided is a method for recording data to a tape medium in such a manner as to achieve the easy management of mutually related multiple data pieces. First data and second data continuously received as a file from a higher level apparatus are accumulated in multiple buffer segments in the form of multiple successive data sets. A data structure is determined for each of the accumulated data sets. Management information indicating a result of the determination is added to the data sets, and the data sets and the management information thereof are stored into the tape medium. | 01-19-2012 |
20120206830 | TRANSDUCER HEAD WITH MULTIPLE READ SENSORS - In order to improve a consistent data track during writing to a storage medium, a plurality of read sensors are affixed to a transducer head. In one implementation, the transducer head includes multiple read sensors placed up-track of the write pole. In another implementation, the transducer head includes at least one read sensor placed up-track of the write pole and at least one read sensor placed down-track of the write pole. Each position of the multiple read sensors relative to the write pole may be unique. One or more read signals of selected read sensors are used to determine the read location and therefore the write pole location relative to the storage medium. | 08-16-2012 |
20130027804 | WRITE DATA SWITCHING FOR MAGNETIC DISK DRIVES - One embodiment of the invention includes a system for writing data onto a magnetic disk. An output driver provides a first write current through a first output transistor in a first state and provides a second write current through a second output transistor in a second state. The first and second write currents can be provided to a disk write head to store opposing binary values, respectively. A bias current generator switches a first bias current between an intermediate voltage node in the second state and a first control node in the first state, and switches a second bias current between the intermediate voltage node in the first state and a second control node in the second state. The first and second bias currents can be provided to set a bias voltage at the first and second control nodes to bias the first and second output transistors, respectively. | 01-31-2013 |
20130314816 | TRANSDUCER HEAD WITH MULTIPLE READ SENSORS - In order to improve a consistent data track during writing to a storage medium, a plurality of read sensors are affixed to a transducer head. In one implementation, the transducer head includes multiple read sensors placed up-track of the write pole. In another implementation, the transducer head includes at least one read sensor placed up-track of the write pole and at least one read sensor placed down-track of the write pole. Each position of the multiple read sensors relative to the write pole may be unique. One or more read signals of selected read sensors are used to determine the read location and therefore the write pole location relative to the storage medium. | 11-28-2013 |
20160042750 | METHODS OF USING PRODUCTS WITH TAPE FORMATS HAVING ONE OR MORE SPARE AREAS - A tape drive-implemented method according to one embodiment includes determining, by a tape drive, a format of a magnetic recording tape, and reading from and/or writing to the magnetic recording tape, by the tape drive, according to the format. The format specifies a number of active channels and a contiguous spare area on the magnetic recording tape. The format also specifies compatibility with a second format. The second format specifies a different number of active channels than the number of active channels specified by the format. | 02-11-2016 |
20160171993 | MAGNETIC HEAD WITH PLURAL READ ELEMENTS HAVING PINNED LAYERS MAGNETIC DISK DEVICE COMPRISING THE SAME AND READING METHOD USING MAGNETIC HEAD | 06-16-2016 |
20170236534 | Write Current Switching in a Data Storage Device | 08-17-2017 |
360062000 | Record-reproduce | 3 |
20090067079 | DATA STORAGE DEVICE WITH SECURITY FEATURE - A data storage device is disclosed with at least two partitions and a set of switches to separately enable and disable read and write operations to each of the partitions, wherein read and/or write operations for at least one of the partitions is disabled when the data storage device is accessible by one or more potentially malicious processes. In one embodiment, there are five partitions for (1) operating systems and trusted applications, (2) applications from non-trusted sources, (3) confidential data, (4) non-confidential data, and (5) all other data. A mode switch can be used to enable and disable reading and writing for each of the partitions according to a predetermined set of rules that effectively prevent viruses and other malware from altering or accessing programs and data. | 03-12-2009 |
20120099219 | SECURE DATA STORAGE DEVICE - A data storage device is disclosed with at least two partitions and a set of switches to separately enable and disable read and write operations to each of the partitions, wherein read and/or write operations for at least one of the partitions is disabled when the data storage device is accessible by one or more potentially malicious processes. In one embodiment, there are five partitions for (1) operating systems and trusted applications, (2) applications from non-trusted sources, (3) confidential data, (4) non-confidential data, and (5) all other data. A mode switch can be used to enable and disable reading and writing for each of the partitions according to a predetermined set of rules that effectively prevent viruses and other malware from altering or accessing programs and data. | 04-26-2012 |
20150098148 | LINEAR RECORDING DEVICE FOR EXECUTING OPTIMUM WRITING UPON RECEIPT OF SERIES OF COMMANDS INCLUDING MIXED READ AND WRITE COMMANDS AND METHOD AND PROGRAM FOR EXECUTING THE SAME - A method is provided according to one embodiment, which executes an optimum writing method even when overwrite is intervened between mixed read and write operations. In response to receiving an overwrite command while executing the mixed operations, which writes to a predetermined tape position, when a tape position to overwrite on is encountered before the append-written data ending position of the tape (tape EOD), the overwritten tape position is regarded as the append-written data ending position of the tape (tape EOD) to update the tape EOD by the overwritten tape position. When a tape position to overwrite is encountered after the append-written data ending position of the tape (tape EOD), the overwritten tape position is updated by the append-written data ending position of a non-volatile memory (non-volatile EOD). The updating the EODs enhances the performance of the mixed read and write operations even when an overwrite command is intervening. | 04-09-2015 |
360063000 | Between plural stationary heads | 3 |
20140320997 | MULTIPLE WRITERS WITH REDUCED CROSSTALK - A system according to one embodiment includes at least two write transducers for writing to a magnetic medium; and a low reluctance path from a first pole of a first of the write transducers to a second pole of a second of the write transducers. | 10-30-2014 |
20150092294 | READING FROM A TAPE STORAGE MEDIUM - In a method for operating a tape storage system, readback signals are simultaneously received from a set of data readers reading from data tracks of a set of adjacent data tracks extending along a longitudinal extension of a tape storage medium, wherein each data track of the set has a width and each data reader of the set has a width equal to or less than the width of a data track. Simultaneously to receiving the readback signals from the set of data readers readback signals are received from a servo reader arrangement containing at least one servo reader arranged laterally offset from one of the data readers by less than the width of a data track. At least one of lateral position, velocity, gain and timing information is determined dependent on the readback signals of each servo reader in the servo reader arrangement. | 04-02-2015 |
20150092295 | READING FROM A TAPE STORAGE MEDIUM - A method for operating a tape storage system includes simultaneously receiving readback signals from a set of data readers reading from data tracks of a set of adjacent data tracks extending along a longitudinal extension of a tape storage medium. Each data track has a width and each data reader has a width that exceeds the width of a data track. In the readback signal, of one of the data readers of the set a simultaneous presence of two defined waveforms is detected stemming from two different servo patterns arranged in servo sections of adjacent data tracks of the set. At least one of lateral position, velocity, gain and timing information is derived from a measure of the energy of the two defined waveforms detected in the readback signal of the data reader and applying this information in the operation of the tape storage system. | 04-02-2015 |
360064000 | Between heads in alternate engagement with medium | 3 |
20100118432 | MAGNETIC STORAGE APPARATUS - According to one embodiment, a magnetic storage apparatus includes a magnetic storage medium that includes a servo pattern in which magnetic bodies magnetized to one of an S-pole and an N-pole are discretely arranged in a non-magnetic substance at least in a recording track line direction, an electromagnetic conversion element configured to output a reproduction signal according to a magnetic field leaking from the magnetic bodies; a rectifier circuit configured to receive the reproduction signal swinging from positive to negative and vice versa corresponding to a magnetic pole, and generate a reproduction signal swinging to either a positive or negative direction according to the reproduction signal; and a control circuit configured to cause the electromagnetic conversion element to be positioned to a single recording track on the magnetic storage medium according to the reproduction signal generated in the rectifier circuit. | 05-13-2010 |
20150380032 | SYSTEMS AND METHODS FOR WRITING DATA TO BOTH SIDES OF SEQUENTIAL STORAGE MEDIA - In accordance with embodiments of the present disclosure, a sequential storage media system for writing to both sides of a sequential storage medium, may include a first head and a second head. The first head may be configured to maintain contact with a first side of the sequential storage medium and read data from and/or write data to the first side as the sequential storage medium is wound between reels for winding the sequential storage medium. The second head may be configured to maintain contact with a second side of the sequential storage medium and read data from and/or write data to the second side as the sequential storage medium is wound between reels for winding the sequential storage medium. | 12-31-2015 |
20160148629 | DUAL WRITER HEAD DESIGN - A storage device includes a transducer head with multiple write elements having write poles of different sizes. For example, the transducer head may include two write poles of different width configured to write to a same surface of a storage medium. A controller of the storage device is configured to selectively engage one of the multiple write elements to write data to the storage medium. | 05-26-2016 |