284 results about "Hard disc drive" patented technology

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 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.

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

A storage system including a plurality of HDDs, a cooling system, and a system controller is provided. Each of the plurality of HDDs includes a disk, a write head configured to write data to the disk, a microphone, an HDD controller configured to process a signal from the microphone determine noise detected by the microphone, and a housing that houses the disk, the write head, the microphone, and the HDD controller. The cooling system is configured to cool the plurality of the HDDs. The system controller is configured to receive data corresponding to the determined noise detected by the microphones of each of the plurality of HDD, and control a cooling level of the cooling system based on the received data and acoustic noise information associated with each of the plurality of HDDs. A method for operating the storage system is also provided.

This invention provides an information processing device that enables normal operation even when the ambient temperature is outside the operating temperature specifications of the electronic devices that constitute the information processing device. [Solution] The information processing device of this embodiment includes a hard disk drive storing an operating system. This information processing device includes a temperature sensor positioned to detect the ambient temperature around the hard disk drive, a temperature acquisition unit that acquires the temperature detected by the temperature sensor in response to power-on, and a temperature determination unit that determines whether the detected temperature is above a predetermined threshold, starts the operating system if the detected temperature is above the threshold, and does not start the operating system if the detected temperature is below the threshold, and repeats the determination at regular time intervals.

Improve non-repetitive runout (NRRO) associated with the system's structural dynamics and operating vibrations. [Solution] A data storage device such as a hard disk drive (HDD) includes a rotary pivot bearing assembly of a rotary actuator configured with a bearing span smaller than the maximum available bearing span, thereby reducing the rotary pivot tilt (PT) gain of the corresponding acoustic transfer function relative to the rotational pivot tilt (PT) gain of the original acoustic transfer function corresponding to the maximum available bearing span. To counteract the resulting decrease in coil torsion and rotational pivot tilt frequency, the voice coil is thickened vertically to increase the coil torsion (CT) frequency and rotational pivot tilt frequency, bringing them closer to their values ​​in the original acoustic transfer function. Combining a relatively short bearing span with a relatively thick voice coil ensures and improves performance by maintaining relatively high CT and PT frequencies while guaranteeing a relatively low PT gain.

The present embodiments can generally provide a magnetic write head structure with optimized gap current distribution to maximize the current-assisted areal density capacity (ADC) gain in hard-disk-drive storage devices. In a first example embodiment, a non-dual-write-shield (nDWS) write head can include a main pole (MP), a trailing shield (TS), and a write gap (WG) disposed between the MP and the TS. The write head can also include a side shield (SS), a leading shield (LS), and a write shield (WS). The write head can include a side gap (SG) between the MP and the SS on both sides of the MP tip, and a leading gap (LG) between the MP and the LS. The write head can also include a coil wrapped around the MP through a PP3 shield that is configured to direct a time-dependent write current to saturate magnetization of the MP.

A hard disk drive enclosure base includes a main base composed of a first material and having at least one bottom opening therethrough, a base insert composed of a second material having a higher Young's modulus than the first material and inserted into a corresponding opening of the main base, and a friction stir weld (FSW) coupling the base insert to the main base. The base may further include a thin film sealing material between a base insert flange and the main base, which is heated by way of the FSW process and further hermetically seals the interface between the base insert and the main base. Such a base insert may be used to support with additional stiffness the spindle motor assembly and / or the actuator assembly, and provides for increasing the number of disks while maintaining sufficient rigidity in a standard form factor drive while maintaining a hermetically-sealed enclosure.

Magnetic moments can be increased in hard disk drive (HDD) shields and ferromagnetic layers to minimize magnetic saturation while still maintaining low magnetic coercivity (Hc) and high saturated magnetic flux (Bs). A textured layer can be used to induce nucleation and growth of an interfacial nature such that body centered cubic (BCC) ferromagnetic materials with high Bs and low Hc are obtained while also increasing the magnetic moment. The textured layer will cause the ferromagnetic material to grow with low Hc regardless of the crystallographic orientation.

Controlling a shingled magnetic recording (SMR) hard drive involves attempting a sequential write to a first sector of a sequence of sectors and, responsive to encountering a write inhibit boundary corresponding to the first sector, continuing the write to the next available sector in the sequence of sectors for the write. Thus, instead of that write inhibit triggering a hard error, the data is adaptively written to the next down-track physical sector possible, i.e., “sliding” to the next sector. This does not require an additional disk revolution thus there is negligible performance penalty. The write may be continued to the next track if necessary, and may continue through the entire zone, to maintain all the data in sequential form for performance and large block protection purposes.

An air guide and noise reduction device and a server are provided. The air guide and noise reduction device includes: an air guide tunnel, the air guide tunnel has an air inlet and an air outlet, and an area of the air inlet is less than an area of the air outlet; and a resonant cavity, wherein the resonant cavity is communicated to the air guide tunnel through a plurality of first openings, so that the resonant cavity absorbs noise propagated along the air guide tunnel through the plurality of first openings and resonates with the noise. By using this device, sound waves propagated from a fan to a surface of a hard disk drive may be filtered out and eliminated, the impact of the sound waves on performance of the hard disk drive may be reduced.

A head gimbal assembly (HGA), such as for a hard disk drive (HDD), includes a load beam formed with a platform and a side rail extending away from each lateral edge of the platform in a direction away from a corresponding flexure, where each side rail portion includes a limiter structure, and a limiter structure extending from the side rail in a direction toward the flexure, the limiter structure including a hooking portion positioned on a distal side of the flexure for limiting displacement of the flexure in a direction away from the load beam. As a component of the load beam, the limiter does not adversely affect the dynamic performance of an existing universal joint designed to achieve high surface density (HDD).

A gimbal head assembly (HGA), such as that used in a hard disk drive (HDD), comprises a load beam formed with proximal openings and a bend coupled to the load beam. The bend includes a tongue section to which a fine actuator is coupled, and the tongue section includes corner sections proximal to the fine actuator. Each opening of the load beam is shaped and positioned to overlap the corner section of the bend, preventing contact between the load beam and the corner section in response to shock events. This creates a gimbal clearance of the bend relative to the load beam, protecting the integrity of the piezoelectric fine actuator elements from, for example, non-operational shock events.

The present application discloses a data processing method, device, storage medium and electronic device. The method includes: obtaining each data input from each data node; mapping each data into a corresponding data slice according to a mapping relationship; determining the priority of the storage area, wherein the storage area includes: a solid-state drive and a hard disk drive; preferentially inputting the data stored in the data slice into multiple buffer areas in the solid-state drive, and after the occupancy rate of the buffer area of ​​the solid-state drive reaches a preset threshold, writing the remaining data to the hard disk drive. The present application solves the technical problem of serious skew in storage data caused by the access data skew phenomenon generated by multi-user, multi-task and multi-priority access flows of big data in the process of cloud computing, as well as causing hot data competition and waste of cold data storage resources.

One aspect of an information processing device according to the present invention comprises: a hard disk drive; a processing device that accesses the hard disk drive; a plurality of fan devices that cool the processing device; and a control device that controls the plurality of fan devices. The control device acquires an error rate of the hard disk drive while changing the number of rotations of the plurality of fan devices under a condition in which the average air volume of the plurality of fan devices is a first air volume, and controls the number of rotations of the plurality of fan devices on the basis of a first combination which, among combinations of the number of rotations of the plurality of fan devices, makes the error rate equal to or less than a threshold value.

Methods and systems for the extraction of magnetic material from magnet containing material, and for extraction of rare earth elements (REEs) from the magnetic material are disclosed. An exemplary system includes a milling / washing unit for magnet containing material such as end-of-life motors, hard drives, partially deconstructed motors, magnet-containing end-of-life product, or parts thereof, and outputting magnetic components by exploiting magnetic properties of ferromagnetic and paramagnetic materials in the presence and absence of electromagnetic fields in conjunction with other physical properties such as size and density. The system also includes a chemical processing unit for receiving the magnetic components to extract rare earth elements in the material. Chemical processes are disclosed for separating rare earth elements from magnetic components.

A hard disk drive comprises multiple disk media mounted on a spindle, with the outer diameter of each disk media offset relative to its inner diameter in the same direction along a rotational axis of the spindle, and a load / unload ramp positioned based on this offset to align with the outer diameters of the disk media. This mitigates the curvature of irregular disk media, such as that associated with increasingly thinner disks, by grouping similarly characterized irregular disks on a given spindle and compensating the ramp accordingly.