33results about "Record carrier types" patented technology

To provide a disk device capable of suppressing contamination.SOLUTION: A disk device includes a magnetic disk, a magnetic head, a flexible printed circuit board, electronic components, and a wall. The flexible printed circuit board is electrically connected to the magnetic head. The electronic components are mounted on the flexible printed circuit board. The wall has higher rigidity than the flexible printed circuit board and is mounted on the flexible printed circuit board. The flexible printed circuit board has a first surface facing the electronic component through a space and a second surface positioned on an opposite side of the first surface and facing the wall, and is provided with a first through hole opened on the first surface and the second surface and communicating with the space. The wall is provided with a second through hole penetrating the wall and communicating with the first through hole.SELECTED DRAWING: Figure 4

To accurately detect read errors in postcodes. [Solution] The magnetic disk device of the embodiment comprises a magnetic disk having a plurality of tracks, a magnetic head for reading and writing data to the magnetic disk, a plurality of servo regions provided on each of the plurality of tracks and including at least a portion of a first physical pattern which is the physical pattern after writing of a first data pattern including position information for each of the plurality of tracks, and a control unit for controlling the magnetic head. Each of the plurality of servo regions includes either a first servo region including the first physical pattern, or a second servo region including a second physical pattern which is the physical pattern after writing of a second data pattern different from the first data pattern, for each of the plurality of tracks, and the control unit determines whether the third servo region among the plurality of servo regions of the plurality of tracks has the first or the second physical pattern.

According to one embodiment, a magnetic disk device includes a rotatable disk-shaped recording medium including a plurality of concentric recording tracks, a magnetic head including a write element which writes data to the recording tracks, a heating element, and a sensor which detects a surface condition of the recording medium, and a controller including an inspection circuit which detects, based on an sensor output of the sensor, presence or absence of a bump on a surface of the recording medium, a height and a width of the bump, and a memory which records the detected height and width of the bump.

According to one embodiment, a magnetic disk device includes a rotatable disk-shaped recording medium including a plurality of concentric recording tracks, a magnetic head including a write element which writes data to the recording tracks, a heating element, and a sensor which detects a surface condition of the recording medium, and a controller including an inspection circuit which detects, based on an sensor output of the sensor, presence or absence of a bump on a surface of the recording medium, a height and a width of the bump, and a memory which records the detected height and width of the bump.

A method of manufacturing a magnetic disk device of an embodiment includes: adjusting relative heights of a spindle and a plurality of ramps, the spindle being allowed to rotate in a state in which center axes of a plurality of magnetic disks having ends deviating from a geometrical plane with a center point as a reference are aligned, the plurality of ramps being arranged at end positions of the plurality of magnetic disks; and assembling the plurality of magnetic disks along an axial direction of the spindle in a state in which directions of deviations of the ends from the center point are aligned.

The computer-implemented method and the computing device for partitioning video data between multiple discs are disclosed. An evidence data and / or a list of evidence data comprising multiple items, wherein at least some items are grouped in events, is received. An event for allocation is selected and allocated by assigning each item of the event to a disc according to a predefined criteria.

A display device includes circuitry configured to transmit, to a reproduction device, display-capability information representing performance characteristics of the display device. The circuitry receives video data from the reproduction device that includes brightness-characteristic information and information of a master video when the display-capability information represents a display performance of the video data. The circuitry displays an image of the received video data in accordance with brightness designated by the received information, and adjusts the image brightness based on the display device's performance. When the master video is high-dynamic-range (HDR) video data, the circuitry recognizes the HDR content and displays the image in accordance with brightness characteristics of the master video.

An embodiment of the present invention provides a disk device capable of suppressing peeling of a flexible printed circuit board. A disk device of one embodiment has a magnetic disk, a magnetic head, a first flexible printed circuit board, and a second flexible printed circuit board. The first flexible printed circuit board has a plurality of first terminals. The second flexible printed circuit board has a surface, a plurality of second terminals provided on the surface and joined to the plurality of first terminals by a joining body, and a first planar ground layer covering at least one of the plurality of second terminals in a direction orthogonal to the surface. The plurality of second terminals include a first read terminal. The first planar ground layer is separated from at least a portion of the first read terminal in a direction along the surface.

A system 100 for the erasure of data from a tape cartridge 110 has a data tape 112, a cartridge memory (CM) chip and a controller 102 in communication with a magnetic head 108, a tape driver 106 and a

This invention provides a data storage device that controls the torsional mode of a coil and reduces the power consumption of an actuator. [Solution] A voice coil motor assembly (VCMA) 400 for hard disk drives and the like includes a low-density voice coil 407 and a high-density coil reinforcement 408 positioned inside the wire coil. The low-density voice coil, utilizing copper-clad aluminum or aluminum wire, increases the second coil torsion mode frequency of the VCMA, thereby bringing it closer to the second torsion mode frequency of the actuator arm 402. In addition, the high-density reinforcement, utilizing steel, copper, or zinc, increases the mass of the VCMA with respect to the center of mass of the VCMA around the rotation axis of the VCMA, compensating for the lower-density wire. With respect to the position error signal (PES) under customer box vibration conditions, significant peaks in the PES spectrum are largely eliminated, and the power of the PES is reduced by approximately half.

A module including first and second variable inductances. The first variable inductance is electrically connected to a pair of nodes in a first half-circuit. One of the nodes in the first half-circuit is a first connection terminal. The second variable inductance is electrically connected to a pair of nodes in a second half-circuit. One of the nodes in the second half-circuit is a second connection terminal. The first half-circuit receives a flow of current in response to the second half-circuit supplying the current to the load in a flow direction from a load through the first connection terminal. The second half-circuit is configured to receive the flow of the current in response to the first half-circuit supplying the current to the load in a direction opposite to the flow direction from the load through the second connection terminal.

The present invention provides a system for the erasure of data from a tape cartridge having a data tape and a CM chip, the device comprising: a controller in communication with: a magnetic head; a tape driver; and an antenna, wherein, when a data cartridge is detected by the controller, the controller is operable to signal to the antenna to determine the CM chip identification data; and, the controller is operable in dependence on the received CM chip identification data to instruct the antenna to overwrite at least a portion of the non-protected memory of the CM chip.

The present invention provides a system for the erasure of data from a tape cartridge having a data tape and a CM chip, the device comprising: a controller in communication with: a magnetic head; a tape driver; and an antenna, wherein, when a data cartridge is detected by the controller, the controller is operable to signal to the antenna to determine the CM chip identification data; and, the controller is operable in dependence on the received CM chip identification data to instruct the antenna to overwrite at least a portion of the non-protected memory of the CM chip.

To provide a disk device capable of improving the degree of freedom of design.SOLUTION: A disk device according to one embodiment includes a plurality of magnetic disks, a spindle motor, a housing, a first substrate, and a first connector. The magnetic disks are arranged in an axial direction along a first rotation axis. The spindle motor rotates the magnetic disk. The housing has a first wall provided therein with a space housing the magnetic disk and the spindle motor, to which the spindle motor is attached, and a second wall projecting from the first wall and surrounding the space. The first substrate is attached to the outer surface of the second wall facing the outside of the space. The first connector is attached to the first substrate. The diameter of the magnetic disk is 80 mm or more and 100 mm or less. The maximum dimension of the housing in the axial direction is 26.2 mm or more.SELECTED DRAWING: Figure 1

The present technology relates to a reproduction device, a reproduction method, and a recording medium that enable content having a wide dynamic range of brightness to be displayed with an appropriate brightness. A recording medium, on which the reproduction device of one aspect of the present technology performs reproduction, records coded data of an extended video that is a video having a second brightness range that is wider than a first brightness range, brightness characteristic information that represents a brightness characteristic of the extended video, and brightness conversion definition information used when performing a brightness conversion of the extended video to a standard video that is a video having the first brightness range. The reproduction device decodes the coded data and converts the extended video obtained by decoding the coded data to the standard video on the basis of the brightness conversion definition information.

A voice coil motor assembly (VCMA), such as for a hard disk drive, includes a low density voice coil and a high density coil reinforcement disposed inside the wire coil. The low density voice coil utilizes copper clad aluminum or an aluminum wire configured to increase a second coil torsional mode frequency of the VCMA so as to be closer to a second torsional mode frequency of the actuator arm. At the same time, the high density reinforcement utilizes steel or copper or zinc configured to increase the mass of the VCMA about the center of mass of the VCMA about its axis of rotation to compensate for the lower density wire. When viewed under client chassis vibration conditions, and according to a position error signal (PES), non-trivial peaks in the PES spectrum due to the second coil torsional modality are greatly eliminated, and the power of the PES is reduced to about half.

A magnetic disk device according to an embodiment includes: a magnetic disk including a plurality of tracks; a magnetic head that performs data reading and data writing on the magnetic disk; a plurality of servo regions that is provided in each of the plurality of tracks, and at least partially includes a first physical pattern, the first physical pattern being a physical pattern after writing of a first data pattern including position information of each of the plurality of tracks; and a controller that controls the magnetic head, wherein the plurality of servo regions includes one of a first servo region including the first physical pattern, and a second servo region including a second physical pattern, the second physical pattern being a physical pattern after writing of a second data pattern different from the first data pattern, for each of the plurality of tracks, and the controller performs determination as to which of the first and second physical patterns a third servo region has, the third servo region being one of a servo region among the plurality of servo regions included in the plurality of tracks.

The embodiment of the invention relates to a magnetic disk device. According to one embodiment, a magnetic disk device includes: a rotatable disk-shaped recording medium having a plurality of recording tracks; a magnetic head including a writing element that writes information on the recording track, a heating element, and a sensor that detects a surface state of the recording medium; and a controller that includes an inspection circuit that detects the presence or absence of a protrusion on the surface of the recording medium and the height and width of the protrusion on the basis of a sensor output of the sensor, and a memory that records the height and width of the detected protrusion.

To provide a disk drive capable of suppressing contamination. [Solution] A disk device according to one embodiment comprises a magnetic disk, a magnetic head, a flexible printed circuit board, electronic components, and a wall. The flexible printed circuit board is electrically connected to the magnetic head. The electronic components are mounted on the flexible printed circuit board. The wall has higher rigidity than the flexible printed circuit board and is attached to the flexible printed circuit board. The flexible printed circuit board has a first surface facing the electronic components through a gap, and a second surface located on the opposite side of the first surface and facing the wall, and is provided with a first through-hole that opens to the first surface and the second surface and communicates with the gap. The wall is provided with a second through-hole that penetrates the wall and communicates with the first through-hole.

A voice coil motor assembly (VCMA), for example for a hard disk drive, includes a low-density voice coil and a high-density coil stiffener located within the wire coil. The low-density voice coil, which uses copper-clad aluminum or aluminum wire, is configured to raise the second torsional mode frequency of the VCMA, thereby bringing it closer to the second torsional mode frequency of the actuator arms. Associated with this, the high-density stiffener, which uses steel, copper, or zinc, is configured to increase the mass of the VCMA to counterbalance the lower-density wire with respect to the VCMA's center of gravity around its axis of rotation.When considered under conditions of customer box vibration and with regard to position error signals (PES), a not insignificant peak in the PES spectrum is largely eliminated due to the second coil torsion mode, and the strength of the PES is reduced to about half.

To detect fraud of a parity generated from truck-wise data.SOLUTION: A magnetic disc device includes an HDC and an RWC. The HDC receives a plurality of data pieces from a host, performs, for each of the data pieces, generation and addition of first codes and output of the data pieces added with the first codes. The HDC calculates an exclusive logic sum for a group of first codes and outputs obtained first information. The RWC performs data conversion and exclusive logic sum calculation for the plurality of data pieces added with the first codes, and outputs the plurality of data pieces already subjected to the data conversion and a truck parity obtained by the exclusive logic sum calculation. The RWC obtains the first codes from the plurality of data pieces. The RWC calculates an exclusive logic sum for a group of second codes as the obtained first codes to obtain second information. The RWC compares first information with the second information and outputs a result of the comparison.SELECTED DRAWING: Figure 6

This invention provides a data storage device that controls the torsional mode of a coil and reduces the power consumption of an actuator. [Solution] A voice coil motor assembly (VCMA) 400 for hard disk drives and the like includes a low-density voice coil 407 and a high-density coil reinforcement 408 positioned inside the wire coil. The low-density voice coil, utilizing copper-clad aluminum or aluminum wire, increases the second coil torsion mode frequency of the VCMA, thereby bringing it closer to the second torsion mode frequency of the actuator arm 402. In addition, the high-density reinforcement, utilizing steel, copper, or zinc, increases the mass of the VCMA with respect to the center of mass of the VCMA around the rotation axis of the VCMA, compensating for the lower-density wire. With respect to the position error signal (PES) under customer box vibration conditions, significant peaks in the PES spectrum are largely eliminated, and the power of the PES is reduced by approximately half.

To provide a method and a storage device for writing repetitive run-out data, which presents a repetitive contribution to position error, to a rotating constant density magnetic storage medium.SOLUTION: A method includes the steps for: repeating for each track at each radius of a constant density magnetic storage medium; determining the frequency of each track pattern based on a track position and desired data density; identifying the position in each servo wedge on each track based on servo synchronization mark detection; writing repetitive run-out data with constant time delay from the identification of the position in each servo wedge to each servo wadge in order to achieve a prescribed offset, and in which the time delay is inversely proportional to each radius; and repeating the step for determining for each servo wedge on each track of the constant density magnetic storage medium, the step for identifying the position, and the step for writing.SELECTED DRAWING: Figure 11

Data storage devices that include one or more crash stops that include cured, silicone rubber. Related articles (e.g., shock-absorbing member) that include cured, silicone rubber for crash stops and methods of making shock-absorbing members that include cured, silicone rubber.

A disk drive device capable of improving reliability is provided. The disk drive device according to this embodiment includes: a disk having tracks including a first servo sector and a second servo sector different from the first servo sector; a head for writing data to the disk and reading data from the disk; and a controller that records first signal strength recording data associated with the signal strength obtained from reading first target servo data, and normalizes the first signal strength data associated with the signal strength obtained from reading the first target servo data when reading the first target servo data, wherein the first target servo data is the target servo data of the first servo sector.

A digital content package includes first content comprising a video feature such as a motion picture or the like, and a user-selectable application configured to operate as follows. When activated using an icon off of a menu screen, the application records an identifier for scenes (discrete portions) of the first content that are selected by a user to generate a playlist. The user may select the scenes by indicating a start and end of each scene. The application saves the playlist locally, then uploads to a server. Via a user account at the server, a user may publish the playlist to a user-created distribution list, webpage, or other electronic publication, and modify the playlist by deleting or reordering scenes.

To provide a high-precision hard disk drive suspension assembly for a surface density increase.SOLUTION: A suspension assembly 300 includes a carriage from which multiple arms extend, where the arms include an outer arm 302 at each end of the carriage; and inner arms between the outer arms, such that each inner arm carries two suspension assemblies and each outer arm carries only one suspension assembly coupled with an inner side of the outer arm, with each suspension assembly including a corresponding fine actuator 310 and a counter-suspension assembly coupled to an outer side of each outer arm, where each counter-suspension assembly includes a structurally flexible dummy load beam having a mass distribution and a stiffness distribution configured to mitigate multiple structural dynamics modes of the operating suspension assembly coupled to the inner side of the outer arm.SELECTED DRAWING: Figure 3A

To provide a magnetic disk device capable of suppressing performance deterioration caused by minute projections on a recording medium.SOLUTION: According to an embodiment, a magnetic disk device includes a magnetic head including a rotatable disk-shaped recording medium having a plurality of recording tracks, a write element which writes information to the recording tracks, a heating element, and a sensor which detects a surface state of the recording medium, and a controller including an inspection circuit which detects presence or absence of a bump on a surface of the recording medium and a height and a width of the bump based on a sensor output of the sensor, and a memory which records the detected height and width of the bump.SELECTED DRAWING: Figure 1

A multiple-actuator hard disk drive includes a first actuator associated with a first logical unit and configured to operate on a first set of disk surfaces, a second actuator associated with a second logical unit and configured to operate on a second set of disk surfaces greater than the first set, and a controller accessing a mapping of logical memory addresses to physical memory locations. The mapping maps the first logical unit to the physical memory locations of the first set of surfaces and a parasitic portion of the second set of surfaces, and maps the second logical unit to the physical memory locations of the second set of surfaces exclusive of the parasitic portion of the second set of surfaces. Thus, data transfer commands performed on the parasitic portion are executed by one actuator while credit is given to the logical unit associated with the other actuator.