Abstract: An apparatus includes an absorption circuit, a control circuit and a hot plug line; an input end of the absorption circuit is connected to an input end of the hot plug line, an input end of the control circuit is connected to the input end of the hot plug line, output ends of the absorption circuit and the control circuit are grounded, an output end of the hot plug line is connected to an input end of a sub-node mainboard, and the input end of the hot plug line is connected to a power supply end of a whole cabinet; the absorption circuit includes a first capacitor; in response to the hot plug line being connected to the power supply end of the whole cabinet, the first capacitor is not powered on; in response to the sub-node mainboard being powered on, the first capacitor is powered on.

Abstract: A data storage device includes a disc, an actuator arm assembly, a servo clock, and a feedback and control system. The disc includes a top and bottom surfaces and a servo wedge. The servo wedge includes a top surface boundary and a bottom surface boundary. The actuator arm assembly supports a head pair configured for interaction with the top and bottom surfaces. The servo clock is configured to determine a top time at which the head pair encounters the top surface boundary and a bottom time at which the head pair encounters the bottom surface boundary during a disc read/write interaction. The feedback and control system is configured to determine an operation time difference; compare the operation time difference to a certification time difference correlating to a target vertical position of the actuator arm assembly relative to the disc; and move the actuator arm assembly to the target vertical position.

Abstract: A protection system for abnormal power down of a child node in a rack-scale server includes a logic control module and a plugging/unplugging trigger module. The plugging/unplugging trigger module is configured to detect a contact state, at a second plugging depth, between a power supplying clamp of the child node and the power supplying copper bar through a metal probe, generate a detection signal by conversion, and send the detection signal to the logic control module; the logic control module is configured to successively turn off a main power supply and a standby power supply of the child node after determining that the power supplying clamp is disengaged from the second plugging depth of the power supplying copper bar and before the power supplying clamp is disengaged from the third plugging depth of the power supplying copper bar, so as to execute power down logic of normal power off.

Abstract: A data storage device includes a disc, an actuator arm assembly, a servo clock, and a feedback and control system. The disc includes a top and bottom surfaces and a servo wedge. The servo wedge includes a top surface boundary and a bottom surface boundary. The actuator arm assembly supports a head pair configured for interaction with the top and bottom surfaces. The servo clock is configured to determine a top time at which the head pair encounters the top surface boundary and a bottom time at which the head pair encounters the bottom surface boundary during a disc read/write interaction. The feedback and control system is configured to determine an operation time difference; compare the operation time difference to a certification time difference correlating to a target vertical position of the actuator arm assembly relative to the disc; and move the actuator arm assembly to the target vertical position.

Abstract: A data storage device includes a stack of discs mounted on a spindle and a pivot block rotatably mounted around a shaft. The data storage device also includes an arm having first and second ends, with the first end supporting a head and the second end movably attached to the pivot block. The data storage device further includes an ultrasonic piezoelectric actuator that moves the arm along the pivot block to enable the head to interact with data storage surfaces of the discs.

Abstract: A data storage device includes a stack of data storage disks mounted on a spindle, a first arm and a second arm. The stack comprises a first plurality of upper disks and second plurality of lower disks. The first arm is movably attached to an actuator shaft, the first arm having a first head end that supports a first head, the first arm configured to move along a first portion of the actuator shaft to enable the first head to interact with data storage surfaces of the first plurality of upper disks. The second arm has a second head end that supports a second head, the second arm attached to and configured to move along a second portion of the actuator shaft, independently of the first arm, to enable the second head to interact with data storage surfaces of the second plurality of lower disks.

Abstract: Disclosed in the present invention are a 2-(1,2,4-triazolyl)benzoyl arylamine active compound for inhibiting a wheat take-all pathogen, and a preparation method therefor. The active compound has a structure as shown in formula I. R1, R3, and R4 are —H, —F, —Cl, —Br, —I, —CN, —NO2, —CF3, —CHO, —C1-C4 alkyl groups, or —C1-C4 haloalkyl groups, or —O—R5; R2 is —H, —F, —Cl, —Br, —I, —CN, —CF3, —CHO, —C1-C4 alkyl groups, or —C1-C4 haloalkyl groups, or —O—R5; X is —F, —Cl, —Br, —I, —CN, —NO2, —CF3, or —COOR6; Y is —H, —F, —Cl, —Br, —I, —CN, —NO2, —CF3, or —COOR6; R5 is —C1-C4 alkyl groups, or —C1-C4 haloalkyl groups; R6 is —C1-C4 alkyl groups, or —C1-C4 haloalkyl groups. The compound I has an excellent inhibition effect on the wheat take-all pathogen and can be applied to prevention and treatment of wheat take-all.

Abstract: An exemplary data storage device includes an actuator arm assembly, a top guide rail, a bottom guide rail, and a first ball bearing. The actuator arm assembly includes a first post defining a pivot axis that is inclined between about 5 degrees and about 25 degrees from a horizontal plane defined by a data storage disk surface. The top guide rail includes a first rolling surface that is parallel to the pivot axis. The bottom guide rail is spaced from the top guide rail and includes a second rolling surface that is parallel to the first rolling surface. The first ball bearing includes a first inner race and a first outer race, the first inner race surrounding the first post, and the first outer race in contact with the first rolling surface or the second rolling surface. An exemplary method of assembling a data storage device is also described.

Abstract: A data storage device includes a base, a data storage disk, an actuator arm, a suspension, and a piezoelectric actuator. The data storage disk is attached to the base and has a read/write surface defining an x-y plane. The actuator arm is attached to the base at a first pivot point to rotate parallel to the x-y plane. The suspension is attached to the actuator arm at a second pivot point, the suspension having a first end comprising a curved edge surface, and a second end supporting a head that is configured to interact with the read/write surface. The piezoelectric actuator is disposed on the actuator arm and comprises a biasing finger configured to contact the curved edge surface to rotate the suspension parallel to the x-y plane about the second pivot point. An actuator arm assembly and a method of use are also described.

Abstract: A data storage device includes a stack of data storage disks mounted on a spindle, a first arm and a second arm. The stack comprises a first plurality of upper disks and second plurality of lower disks. The first arm is movably attached to an actuator shaft, the first arm having a first head end that supports a first head, the first arm configured to move along a first portion of the actuator shaft to enable the first head to interact with data storage surfaces of the first plurality of upper disks. The second arm has a second head end that supports a second head, the second arm attached to and configured to move along a second portion of the actuator shaft, independently of the first arm, to enable the second head to interact with data storage surfaces of the second plurality of lower disks.

Abstract: A data storage device includes a ferromagnetic center pole, a drive coil for an actuator arm assembly, and a magnetic assembly surrounding the drive coil. The drive coil surrounds the center pole and has a top, a bottom, and first and second sides; the first side is attached to the actuator arm assembly. The magnetic assembly includes a top magnet disposed above and spaced from the center pole, a bottom magnet disposed below and spaced from the center pole, and a side magnet disposed proximate the second side of the coil and spaced from the center pole. In another embodiment, a linear actuator comprises a ferromagnetic center pole, a drive coil supported for linear motion on a rail, and a magnetic assembly. A method including linearly moving a drive coil along a center pole by a magnetic field is also described.

Abstract: A load/unload ramp includes a body with ramps, load/unload surfaces, and a vertical wall. The ramps include outer grooves positioned between the ramps. The load/unload surfaces extend from the respective ramps. The vertical wall includes channels extending through the vertical wall. In embodiments, the channels are positioned between the load/unload surfaces.

Abstract: A load/unload ramp includes a body with ramps, load/unload surfaces, and a vertical wall. The ramps include outer grooves positioned between the ramps. The load/unload surfaces extend from the respective ramps. The vertical wall includes channels extending through the vertical wall. In embodiments, the channels are positioned between the load/unload surfaces.

Abstract: Described are enclosures for electronic devices; the enclosures include a cover, a base, and a snap-fit engagement between the cover and the base; also described are methods of preparing the devices.

Abstract: A hard disk drive includes a base deck and a load/unload ramp component. The base deck includes a floor and sidewalls. The load/unload ramp component is coupled to the floor of the base deck. At least one of the sidewalls includes an arcuate extension portion that extends to contact the load/unload ramp component.

Abstract: A hard disk drive includes a base deck and a load/unload ramp component. The base deck includes a floor and sidewalls. The load/unload ramp component is coupled to the floor of the base deck. At least one of the sidewalls includes an arcuate extension portion that extends to contact the load/unload ramp component.

Abstract: Provided herein is an apparatus including a hard drive base. A number of disks are rotatably connected to the hard drive base, and there are a number of disk gaps between the disks. A shroud extends in a circumferential span around the disks, wherein the shroud extends less than the circumference of the disks. The shroud is positioned between the disk gaps and an upwardly sloping gas channel. A number of arcuate gas channels are in the shroud, wherein each arcuate gas channel is horizontally aligned with a corresponding disk gap. The arcuate gas channels connect the disk gaps to the upwardly sloping gas channel.

Abstract: A storage container includes a base housing member coupled to an inner cover and including an inner cavity. The storage container further includes an outer cover coupled to the base housing member and covering the inner cover. A rack assembly includes a plurality of storage devices and is mounted within the inner cavity.

Abstract: A storage container includes a base housing member coupled to an inner cover and including an inner cavity. The storage container further includes an outer cover coupled to the base housing member and covering the inner cover. A rack assembly includes a plurality of storage devices and is mounted within the inner cavity.

Abstract: An apparatus and associated method is provided for suspending a test object in a gravitational field from a support member, exciting the test object by noncontactingly engaging it with a predetermined waveform force, and characterizing the test object qualitatively in relation to an observed modal frequency response of the test object to the excitation.