417 results about "Hard disc drive" patented technology

The invention relates to the technical field of solid state disk energy consumption analysis, in particular to a solid state disk energy consumption prediction method and system based on deep learning. The method comprises the following steps: obtaining a solid state disk drive running log; performing hard disk energy consumption comprehensive evaluation on the running log of the solid-state hard disk driver to generate solid-state hard disk energy consumption data; obtaining a plurality of user request behavior data based on the solid state disk driver running log, and performing read-write energy consumption calculation according to the energy consumption data of the solid state disk so as to obtain energy consumption data of each hard disk read-write operation behavior; performing multi-period hard disk read-write operation identification on the plurality of user request behavior data, and performing read-write logic implicit association learning to generate user read-write logic association features; time window division is carried out on the solid state disk drive operation logs based on the user read-write logic association features, and a plurality of potential behavior prediction scenes are constructed. According to the method, accurate and efficient energy consumption prediction of the solid state disk is realized.

The present invention comprises Magnetic Tunnel Junctions and Bit-Patterned Media with a warped geometry with the purpose of attaining large thermal stability factors and dramatically increasing the scalability of the magnetic bits while still allowing the reduction of switching current density and switching magnetic field, and also increasing switching speed. The warped shape allows providing thermal stability to the bits through dynamic exchange energy barrier and also by providing additional net magnetic anisotropy through shape-induced reduction of the demagnetization field. The dynamic exchange energy barrier in turn allows engineering the damping torque and the free-layer's magnetic parameters to a much larger extent than the current planar technology. It also allows much faster magnetic-field-induced switching of patterned bits than it is possible with current hard disk drive technology, through the use of precession torque instead of conventional damping torque.

A motor includes a stator core including a stacked body of electromagnetic steel plates, a surface of the stacked body is covered with a coating film, and the coating film is an epoxy resin-containing electrodeposition coating film subjected to overbaking.

The invention discloses an expansion card repairing method, system and device and a computer readable storage medium, and relates to the technical field of storage, and the method comprises the steps: detecting whether hardware fault information of an expansion card is read or not in response to the situation that a driver cannot read configuration space information of the expansion card; if the hardware fault information of the expansion card is read, detecting whether a reinitialization operation is executed on the expansion card; if the reinitialization operation is executed on the expansion card, performing power-on and power-off operation on the expansion card; if the reinitialization operation is not executed on the expansion card, carrying out the reinitialization operation on the expansion card; if the hardware fault information of the expansion card is not read, repairing the driver; the expansion card comprises an interface card connected between a server mainboard and a hard disk drive. According to the method, the expansion card fault and the driving fault are distinguished through the hardware fault information of the expansion card, so that the fault condition of the expansion card is accurately identified, and the corresponding repair operation is executed to accurately perform fault repair on the expansion card.

An apparatus includes a linear actuator assembly with a rail, a carriage, and a piezoelectric actuator. The carriage is coupled to the rail such that the carriage is movable with respect to the rail, and the piezoelectric actuator is configured and arranged to cause the carriage to move linearly between ends of the rail.

A head gimbal assembly (HGA) for a hard disk drive includes a carriage arm having a swaging hole, first and second suspensions, and respective first and second swage plates to which the first and second suspensions are respectively coupled. Each swage plate includes a respective series of intermittent swage boss structures extending from a baseplate, where the swage boss structures of each swage plate are relatively positioned, extending from a respective side of the arm into the swaging hole, such each of the one series of swage boss structures interposes with the other series of swage boss structures. With both series of interposed swage boss structures occupying the same swaging hole height, the height of each swage boss can be effectively doubled and a higher retention torque of the swage coupling is enabled even in view of a thinner arm tip and shorter corresponding swaging hole.

A hard disk drive includes multiple disk media mounted on a spindle, where the outer diameter of each disk medium is offset from the inner diameter of the disk medium in a same direction along an axis of rotation of the spindle, and a load / unload ramp positioned, based on the offset, to align in correspondence with the outer diameters of the disk media. Thus, the curvature of irregular disk media, such as that associated with thinner and thinner disks, is mitigated by grouping similarly-characterized irregular disks together on a given spindle and compensating the ramp accordingly.

A voice coil motor (VCM) in a hard disk drive is operated in a discontinuous mode with an alternation of on and off times. A drive current to the VCM is facilitated and countered with a variable voltage across the during the on-times and off-times. The intensity of the drive current is controlled as a function of a Back ElectroMotive Force (BEMF) of the VCM. A method includes sampling during the alternation of on-times and off-times first and second values of the voltage across the VCM. The first value is sampled at a first time in response to the end of the off-time. The second value is sampled at a second time in response to the drive current of the VCM zeroing following the supply of drive current to the VCM being countered during the off-time. The BEMF is calculated as a function of first and second values.

A carrier for carrying a hard drive comprises a shell, a sliding bracket, and a spring. The sliding bracket is placed in the shell and is slidable relative to the shell, and the sliding bracket is configured for holding the hard drive. The spring is connected to the shell and the sliding bracket, and the spring is configured for pushing the sliding bracket. When the carrier is inserted into a cabinet, the spring pushes the sliding bracket to a connector of the cabinet to connect the hard drive to the connector. A cabinet comprises a chassis, a shelf, and a plurality of the carriers. The chassis is used for accommodating a circuit board with connectors. The shelf is placed in the chassis. Each connector is used for connecting the hard drive held in each carrier. A server with the carrier is also disclosed.

Systems and methods are disclosed for harvesting electrical energy from mechanical components of hard disk drives (HDDs) in a data storage system and propagating the electrical energy to devices outside of the HDDs. A power distribution board (PDB) may be coupled to a plurality of HDDs and used to detect a voltage drop on a connection between the PDB and the HDDs indicative of a power loss condition, and, in response, enable the flow of electrical energy from the HDDs to the PDB. The electrical energy from the HDDs may be converted for use by the PDB and / or distribution to other components of the data storage system.

An idle sweep routine for a hard disk drive involves a series of servo-controlled one-Nth (1 / N) equivalent sub-band random seeks in one radial direction, followed by another series of servo-controlled one-Nth equivalent sub-band random seeks in the other radial direction, where a complete band refers to the complete set of user-data tracks and a one-Nth sub-band refers to a contiguous 1 / N portion of the complete band. For example, a first series of ⅕ sub-band random seeks may be in the disk outer diameter (OD) to inner diameter (ID) direction, followed by a second set of ⅕ sub-band random seeks in the ID to OD direction. Based on disk scratch and Si smear robustness, ⅕ sub-band random seeks are found effective in moving the sider over a significant number of tracks during each seek to likely inhibit disk lubrication degradation and avoid thermal asperities during such an idle sweep routine.

A server includes a chassis and a plurality of hard disk drive modules. The chassis includes a body, a partition, a cover plate, and at least one sound deadening structure. The body includes an opening and an accommodating space. The partition is disposed at the opening. The partition includes a first side surface, a second side surface opposite to the first side surface, and at least one flow channel. The first side surface faces the accommodating space, and the flow channel penetrates the first and the second side surfaces. The cover plate is disposed at the opening. The cover plate includes a plurality of ventilation holes. The sound deadening structure is disposed between the second side surface of the partition and the cover plate. The sound deadening structure includes a sound absorbing element and a reflecting element. The hard disk drive modules are accommodated in the accommodating space.

A self-healing Hard Disk Drive (HDD) system includes a chassis housing an HDD device self-healing subsystem coupled to an HDD data storage system that includes a plurality of HDD data storage resources. The HDD device self-healing subsystem prevents data from being stored on a first HDD data storage resource that is included in the plurality of HDD data storage resources included in the HDD data storage system. When the HDD device self-healing subsystem determines that data storage operations using a second HDD data storage resource that is included in the plurality of HDD data storage resources will be subsequently unavailable, it remaps logical addresses associated with the second HDD data storage resource to the first HDD data storage resource, and provides the data that was stored using the second HDD data storage resource on the first HDD data storage resource.

A hard disk drive (HDD) includes a heat-assisted magnetic recording (HAMR) head. The HAMR head includes one or more features comprising a laser device that is a heterogeneous integrated epitaxial grown GaAS laser. The laser device couples directly with a waveguide that transfers the electromagnetic radiation generated by the laser device to a near field transducer. The device includes an N-doped layer for coupling the output of the GaAs active layer to the waveguide.

Provided is a dielectric thin film including a metal oxide. The metal oxide includes bismuth, sodium, barium, and titanium, at least a part of the metal oxide is a tetragonal crystal having a perovskite structure, and a (100) plane of at least a part of the tetragonal crystal is oriented in a normal direction of a surface of the dielectric thin film.

Systems and methods for providing security services during a power management mode are disclosed. In some embodiments, a method comprises detecting with a mobile security system a wake event on a mobile device, providing from the mobile security system a wake signal, the providing being in response to the wake event to wake a mobile device from a power management mode, and managing with the mobile security system security services of the mobile device. Managing security services may comprise scanning a hard drive of the mobile devices for viruses and / or other malware. Managing security services may also comprise updating security applications or scanning the mobile device for unauthorized data.

A flexible printed circuit (FPC) for a hard disk drive includes a first preamplifier electrically connected to first read-write transducers and a second preamplifier electrically connected to second read-write transducers, where all transducers are driven via a single primary actuator, with a top FPC section including electrical traces between a fine actuator corresponding to one of the first transducers and a corresponding controller and a bottom FPC section including traces between a fine actuator corresponding to one of the second transducers and a corresponding controller. To inhibit potential crosstalk between the fine actuator traces and read traces and / or voice coil motor (VCM) traces, the fine actuator traces may be positioned not-adjacent to read traces, such as between write traces adjacent the read traces and serial input / output (SIO) traces adjacent VCM traces, and / or at least five trace-widths away from the VCM traces.

The disclosure relates to a voice coil motor (VCM) in a hard disk drive during a retract phase, wherein read-and-write heads of the hard disk drive are retracted by the VCM from a disk surface towards an end-of-travel parking condition with the heads climbing over a ramp starting from a ramp edge adjacent the disk surface. During the retract phase, the VCM is operated in a discontinuous mode comprising an alternation of on-times of duration TON and off-times of duration TOFF wherein supply of a drive current to the VCM is facilitated and countered, respectively. The duration TOFF of the off-times is varied to have a lower bound value at the ramp edge and to increase towards an upper bound value as the heads climb over the ramp towards the end-of-travel parking condition.

A hard disk drive suspension includes first piezoelectric elements provided at a first position, and second piezoelectric elements provided at a second position. A conductor is connected to the first piezoelectric elements. Conductors are connected to the second piezoelectric elements, respectively. A measurement device includes a vibration signal generation unit which supplies vibration signals to the second piezoelectric elements, a vibration measurement unit which detects vibration generated at the suspension, and a ground connection unit. The conductor electrically connected to the first piezoelectric elements is connected to a ground via a resistor of a ground connection unit.

A voice coil motor (VCM) in a hard disk drive is operated in a discontinuous mode with an alternation of on and off times. A drive current to the VCM is facilitated and countered with a variable voltage across the during the on-times and off-times. The intensity of the drive current is controlled as a function of a Back ElectroMotive Force (BEMF) of the VCM. A method includes sampling during the alternation of on-times and off-times first and second values of the voltage across the VCM. The first value is sampled at a first time in response to the end of the off-time. The second value is sampled at a second time in response to the drive current of the VCM zeroing following the supply of drive current to the VCM being countered during the off-time. The BEMF is calculated as a function of first and second values.

The invention provides a power failure protection method and device, electronic equipment and a storage medium. Relates to the technical field of computers. The method comprises the following steps: acquiring target data in a cache device included in a system; monitoring the working state of the system; responding to the power failure state of the system, and transmitting the target data to a persistent memory area of at least one hard disk drive in the system; the persistent memory area is started when the system is in a power-down state; the persistent memory area can perform data storage when the system is in a power-down state. According to the invention, the overall deployment cost of the system can be reduced, and the operation efficiency of power failure protection is improved.

A management system for a hard drive dismantling system automatically monitors the operation and the output of the dismantling system either remotely or onsite. In one embodiment, the number of hard drives processed by the system is determined and a contract value is determined in real-time. A distributed ledger is employed. Payments are automatically transferred between a customer and a service provider according to a contractual arrangement. The market values of various components, such as rare earth materials, are also optionally provided.

A head gimbal assembly with a gimbal having a base portion and a tongue that are connected by a neck portion, wherein the tongue includes a first lateral side and a second lateral side opposing the first lateral side, first and second struts connected to the base portion, and a distal portion extending from distal ends of the first and second struts toward the tongue. First and second aft tethers have first ends connected to the first and second lateral sides respectively, and second ends connected to the distal portion. First and second fore tethers have first ends connected to the first and second lateral sides respectively, and second ends connected to the first and second struts respectively. A circuit is mounted on the gimbal. The slider is mounted on the tongue and electrically connected to the circuit.

A shingled magnetic recording (SMR) hard disk drive (HDD) receives a read command for data associated with a range of logical block addresses (LBAs). In situations where a first portion of valid data associated with the range of LBAs is stored in an SMR region of the HDD and a second portion of valid data associated with the range of LBAs is stored in a non-SMR region of the HDD, the first portion is read from the SMR region in a single disk access and copied to a first buffer of the HDD, and the second portion is read from the non-SMR region in one or more disk accesses and copied to a second buffer of the HDD. The valid data associated with the range of LBAs stored in the second buffer are copied to the first buffer to be combined with valid data associated with the range of LBAs stored in the first buffer, and the combined valid data is then transferred to the host to complete execution of the read command.

The present disclosure provides systems and methods for improved laser mode jump detection for hard disk drive applications. A solution for providing laser mode jump detection in a hard disk drive may include a first circuit for providing a signal having a step voltage, an amplitude of which may be adjusted according to a first control signal. The solution may include a second circuit that delays the signal for a period of time that may be adjusted according to a second control signal to produce a delayed signal. The solution may include a filter to receive the delayed signal as an input and provide an offset signal corresponding to a frequency response of a sensor as an output. The system may subtract the offset signal from a sensor signal of a sensor to provide an output.

The present embodiments relate to a near-field transducer (NFT) for a hard disk drive write head with a parabolic waveguide blocker. The waveguide blocker can include a parabolic curved surface in a center portion of a first side of the waveguide blocker and a first side comprising a slope angle of between 10-90 degrees. The waveguide blocker can be configured to reduce electromagnetic radiation from the waveguide core and recycle a scattering field emitting from the NFT to mitigate a thermal background in a recording medium and improve a thermal gradient to increase an area density capacity (ADC) of the hard disk drive write head.

Disks for use in hard disk drives (HDD) or other magnetic recording apparatus. The disks are configured based on a finding that internal stress within a disk can make the disk more resistant to shock forces. In one example, a disk is provided that has a substrate with a thickness of no more than 0.5 millimeters and an internal stress no less than 300 megapascals. The relatively high internal stress within the substrate of the disk serves to reduce the magnitude of deflections caused by mechanical shocks to an HDD in which the disk is installed, as compared to other disks of equal thickness but with relatively less internal stress. Multi-platter stacks of the disks are described. Methods are also described for fabricating such disks and for rejecting disks that do not meet certain internal stress-based criteria. Substrates are also described.

To improve a thermal gradient of a near-field transducer (NFT) and increase an areal density capacity of a HAMR head.SOLUTION: An NFT includes a main pole (MP) 302, a two-layer transducer 304 positioned adjacent to the MP, a waveguide core 306, and a parabolic waveguide blocker 308 positioned adjacent to the waveguide core, wherein the parabolic waveguide blocker includes a parabolic shape having a surface exposed to an air-bearing surface (ABS) of a write head. The parabolic waveguide blocker reduces electromagnetic radiation from the waveguide core, recycles a scattering field emitted from the NFT to mitigate a thermal background in a recording medium, improves a thermal gradient, and increases an areal density capacity (ADC) of a hard disk drive write head.SELECTED DRAWING: Figure 3A