99 results about "Disks (device)" patented technology

The invention discloses a backup method and device based on NBD mapping, and relates to the technical field of system backup, and the method specifically comprises the following steps: receiving a system backup instruction; identifying protection object parameters in the system backup instruction to obtain a to-be-reconstructed disk list; in the target medium, creating a corresponding virtual disk device for each physical disk in the to-be-reconstructed disk list based on NBD mapping; based on the to-be-reconstructed disk list and the collected data of the to-be-backed-up host, performing partition table structure reconstruction on the virtual disk device to obtain a virtual disk partition device and a virtual volume device; determining a corresponding relationship between the volume on the host to be backed up and the virtual disk device, the virtual disk partition device and the virtual volume device to obtain a mapping relationship table; and determining a volume set to be backed up based on the mapping relation table. According to the method, the concurrent backup capability is enhanced, and compared with an existing system backup mode, the resource consumption can be reduced, the backup efficiency can be improved, and the data verification time can be shortened.

According to the IO speed limiting method and device under multiple threads, the electronic equipment and the storage medium provided by the embodiment of the invention, the technology realizes speed limiting of the IO request through a quota isolation and critical point synchronization mechanism, and effectively avoids frequent scrambling of a lock at the same time. The core process of the method comprises the following steps: when a client issues an IO request, reading a current value of a speed limit counter, and calculating an available space in combination with a preset speed limit quota and an instantaneous issuing space; when the request quantity does not exceed the available space, directly releasing the request to disk equipment and updating a statistical value; and if the request quantity exceeds the available space, safely accessing the quota management pool through the thread lock, obtaining a target speed limit quota from the global IO request speed limit quota, and temporarily improving the instantaneous issuing space to process the excess request. According to the design, the threads can operate autonomously within the quota through quota independent distribution, lock competition is not needed, meanwhile, synchronous operation is strictly limited in a critical scene of quota application, the lock scrambling frequency is greatly reduced, and therefore IO performance is remarkably improved.

According to one embodiment, a disk device includes a housing with a bottom wall, magnetic disks supported on a hub of a motor, a printed circuit board provided on an outer surface of the bottom wall, and a wiring board attached on the outer surface of the bottom wall. The bottom wall includes a recess formed in the outer surface, a step located on border between the outer surface and the recess, and through holes opened to the recess. The wiring board includes one end portion disposed in the recess and connection pads on the one end portion, connected to lead wires of a coil. An adhesive is filled into the recess and the through holes, and covers the one end and a solder joint and seals the through holes.

Embodiments of the present disclosure provide an access processing method and a computer device. Determining a corresponding storage node from a network storage system according to a file directory that a virtual machine requests to access; creating a first virtual drive device in a physical host and controlling the first virtual drive device to connect with the storage node; where the file directory is configured to be mounted to a target directory of the virtual machine through a second virtual drive device, so that the virtual machine accesses the file directory from the storage node through the target directory based on the first virtual drive device and the second virtual drive device; the second virtual drive device corresponding to the first virtual drive device is created in the virtual machine and synchronously obtains the file directory from the first virtual drive device.

The present invention relates to a device and a system for debugging a solid state disk device, the device comprising: a joint test action group add-on board; and a Raspberry Pi. The Raspberry Pi comprises a general purpose input output interface coupled to the joint test action group add-on board; and a processing unit coupled to the general purpose input output interface. The processing unit is configured to emulate a plurality of joint test action group commands to the solid state disk device through the general purpose input output interface to dump data generated by the solid state disk device during runtime of the solid state disk device. Using the device as described above can reduce the cost required to debug the solid state disk device.

Provided is a disk device, a control method for a disk device, and a program, which enable a rotational latency to be minimized to access a next logical block address (LBA) regardless of which head is used for access in a disk device having a plurality of heads. The disk device of an embodiment includes a storage unit that stores a table in which a track skew value for each head is stored, and a control unit that reads out a track skew value corresponding to a head that is an object of operation from the table and performs track control.

A method and procedure for manufacturing a disk device capable of improving head positioning accuracy in a disk device controlled by multi-rate actuators using two-stage actuators are provided. In this embodiment, before applying an additional MA filter, a test signal is applied at 1 / N cycles to measure the head position error spectrum and frequency characteristics for both the VCM and MA operation values. Based on the frequency characteristics, a multi-rate sensitivity characteristic is calculated, and the frequency to be corrected by the MA filter is determined based on the head position error spectrum and the multi-rate sensitivity characteristic. Furthermore, with each candidate of a plurality of MA filter candidates applied, a test signal is applied at 1 / N cycles to measure the frequency characteristics for both the VCM and MA operation values. Based on the frequency characteristics, a multi-rate sensitivity characteristic is calculated, and the candidate with the lowest head position error and a peak value of the multi-rate sensitivity characteristic below a threshold is selected as the MA filter to be used.

A disk device is controlled using system data. The disk device includes a disk, a non-volatile memory, and a controller. The controller is configured to record a set of system data on both the non-volatile memory and the disk.

A disk device according to an embodiment includes a magnetic disk, a magnetic head, a flexible printed circuit board, and an electronic component. The flexible printed circuit board includes a first insulating layer, a first conductive layer on a first face of the first insulating layer, a second conductive layer on a second face of the first insulating layer, a second insulating layer covering the second face and the second conductive layer, and a first adhesive layer bonding the second insulating layer to the second face and the second conductive layer. The first conductive layer includes a first land. The second conductive layer includes a first part with first through holes, the first part overlapping the first land through the first insulating layer. The first adhesive layer adheres to the second face through the first through holes. The electronic component includes a first pin joined to the first land.

A high-performance disk device is provided. A disk device according to an embodiment includes a disk, a head, and a controller. The disk includes a plurality of servo sectors arranged in a circumferential direction, each of the plurality of servo sectors having servo information written therein, the servo information including a postamble indicating an RRO correction amount, i.e., a repeatable runout correction amount. The head performs data writing to and data reading from the disk. The controller uses a second RRO correction amount different from a first RRO correction amount based on an RRO correction amount indicated by a first postamble, in a case where a read error of the first postamble occurs continuously in positioning control of the head, the first postamble being a postamble of a first servo sector of the plurality of servo sectors.

According to one embodiment, a disk device includes a coil motor that pivots an actuator assembly around a support shaft extending in a first direction. The actuator assembly has a first center axis passing through the center between a pair of bearings and perpendicular to the support shaft. The coil motor includes a lower magnet and an upper magnet, and a voice coil fixed to the actuator assembly and located between the lower magnet and the upper magnet. The voice coil has a coil center axis that extends parallel to the first center axis through the center of the first direction, and is arranged at a height position where the coil center axis is offset in the first direction with respect to the first center axis.

The invention discloses a hard disk batch firmware upgrading method and system based on MCTP over SMBus, and belongs to the technical field of computer hardware management. According to the method, firstly, identity authentication is completed through security verification of a firmware mirror image and a hard disk to be upgraded, then the mirror image is divided into data packets with unique identifiers for broadcast transmission, after a preset data unit is sent, a unicast mode query state is switched, a global state table is established, missing data packets are broadcasted and retransmitted in a targeted mode according to information in the table, and confirmation is carried out. Finally, the instruction hard disk verifies the mirror image in parallel and then uniformly activates the new firmware; the system comprises a BMC module, a plurality of hard disk devices and an SMBus network. According to the scheme, broadcast and unicast advantages are fused, batch upgrading efficiency is improved, transmission integrity and upgrading reliability are guaranteed, safety and manageability are enhanced, existing standard protocols and hardware interfaces are adapted, and practicability is high.

According to one embodiment, a magnetic disk device includes a first disk having a first data track and a second data track, a first write head, a write processing unit, an error correction unit, a correction limit prediction unit, and a determination unit. During a write period, the correction limit prediction unit calculates an excess amount, calculates a metric value by multiplying a first weight coefficient by the excess amount, updates a cumulative metric value, and generates first prediction information. The determination unit determines whether or not to allow the write processing unit to continue write processing for the second data track based on the first prediction information.

The embodiment of the invention provides a disk device capable of properly managing information stored in a non-volatile memory. In a disk device of the present embodiment, a controller can access a non-volatile memory. The non-volatile memory has an error correction circuit and a memory region. The memory region includes a first region, a second region, and a third region. The first region includes a plurality of blocks. When a first block among the plurality of blocks includes a bit capable of correcting an error in an error correction process by the error correction circuit, the controller stores information of the first block in the second region in place of the first region, creates or updates address replacement information, and stores the information in the third region. In the address replacement information, the address of the first block in the first region and the address of the first block in the second region are associated.

To provide a magnetic disk device capable of suitably performing rewrite operations caused by ATI (Automatic Time Indicator). [Solution] The controller performs an addition to the value of a counter corresponding to a neighboring memory area of ​​one of the multiple memory areas in response to a write operation. The rewrite operation includes a seek operation, a stabilization operation that waits for the residual vibration of the magnetic head to decay, and rewriting all the data of the first memory area to the first memory area after the stabilization operation. The controller decrements the value of the counter corresponding to the first memory area among the multiple counters in response to the rewrite operation. The controller performs an addition to the value of the counter corresponding to the second memory area among the multiple counters in response to the rewrite operation. The stabilization operation includes an operation that determines whether the stabilization operation is complete based on whether a first condition is met. The first condition differs depending on the trigger for executing the retry operation.

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.

The invention provides a wireless data transmission method, system and device based on a USB interface and a storage medium. The method comprises the steps that an intelligent electronic device sends a data transmission instruction and USB flash disk verification information to a first terminal device; the first terminal device receives the data transmission instruction and the USB flash disk verification information, determines a file data identifier corresponding to the data transmission instruction, performs first verification processing on the USB flash disk verification information, and obtains encrypted file data corresponding to the file data identifier from the extended storage module based on the file data identifier; the first terminal device sends encrypted file data and the USB flash disk verification information to a second terminal device; and the second terminal device receives the encrypted file data, performs second verification processing on the USB flash disk verification information, and decrypts the encrypted file data through a hardware decryption chip of a second USB flash disk device to obtain decrypted file data. According to the scheme, data transmission can be efficiently and safely realized.

A flexure of a suspension for a hard disk device according to one embodiment is a flexure overlaid on a load beam provided in the suspension of the hard disk device. The flexure includes a metal base having a first surface facing the load beam and a second surface on an opposite side to the first surface. The metal base includes a first limiter and a second limiter, and a first opposing portion and a second opposing portion facing the first limiter and the second limiter, respectively. The first limiter and the second limiters have respective control portions inclined relative to a longitudinal direction of the metal base, which face the first opposing portion and the second opposing portion, respectively, with a gap therebetween in a thickness direction of the metal base.

Embodiments described herein provide for thermal runaway gas venting. A device includes a one-way pressure-rated burst disk component. The one-way pressure-rated burst disk component includes a retaining ring having an internal structure, a seal, and a disk disposed between the retaining ring and the seal such that the internal structure of the retaining ring is adjacent a first surface of the disk. The retaining ring secures the disk against a panel. The internal structure of the retaining ring opposes a force applied at a second surface of the disk from an opposite side of the panel. A battery pack includes a plurality of battery modules and a venting structure between a first row of battery modules and a second row of battery modules. Each battery module includes a plurality of battery cells and a one-way pressure-rated burst disk device.

A method and apparatus for acquiring information and, a data storage system, an electronic device, and a storage medium are provided. The method includes: acquiring disk information of each disk device in a storage system; acquiring first mounting information of a corresponding disk by using the disk identifier; establishing, based on an expander port address comprised in the first device information, a first corresponding relationship between the expander port address with the disk port address; in response to the first device information comprising an adapter identifier of an adapter upstream of the expander, establishing, based on an adapter port address corresponding to the adapter identifier, a second corresponding relationship between the adapter port address with the expander port address; and generating, based on the first corresponding relationship and the second corresponding relationship, device information for describing a topological relationship of the disk in the storage system.

To provide a disk device capable of suppressing oxygen consumption inside the device and improving reliability.SOLUTION: According to one embodiment, a disk device comprises a housing in which a low-density gas containing oxygen and having a density lower than that of air is sealed, a disk-shaped recording medium rotatably provided in the housing, a spindle motor provided in the housing and supporting and rotating the recording medium, and a magnetic head including a thermal assist element for heating the recording medium. The surface of the magnet of the spindle motor is covered with a shielding film for shielding oxygen permeation.SELECTED DRAWING: Figure 3

To provide a disk device capable of suppressing the occurrence of a gap between a first cover and a second cover.SOLUTION: A disk device according to one embodiment includes a magnetic disk, a housing, a constraining layer, and a first adhesive material. The housing includes a base provided with an accommodation space in which the magnetic disk is disposed, a first cover attached to the base so as to close the accommodation space, and a second cover attached to the base so as to cover the first cover. The constraining layer includes a first surface that faces the first cover, and a second surface that is located opposite to the first surface, faces the second cover, and is inclined with respect to the first surface. The first adhesive material is interposed between the first surface and the first cover.SELECTED DRAWING: Figure 1

The application discloses a kind of acceleration method and terminal of block device, when dirty data is flushed to block device, the performance data of device is obtained, so that the performance of block device is judged based on the performance data, for the block device of sufficient performance, it can improve its flush rate, for the block device of lower performance, it needs to judge whether there is a large amount of garbage collection, if so, exit dirty data flush, otherwise, reduce the rate of block device and calculate its maximum flush rate.Therefore, compared with the traditional dirty data threshold control flush and flush rate, the application can realize the flush of dirty data at any time during the idle period of disk without affecting user experience, and the flush rate is no longer based on dirty data as a standard, which can flush dirty data at a higher rate, and the control of dirty data flush rate is more free and reasonable;At the same time, when the hard disk device does a lot of garbage collection, the function of normal exit dirty data flush can reduce user IO delay and improve user experience.

To provide a disk drive that can improve the reliability of flexible printed circuit boards. [Solution] A disk device according to one embodiment comprises a magnetic disk, a magnetic head, a flexible printed circuit board, and an electronic component. The flexible printed circuit board has a first insulating layer, a first conductive layer provided on a first surface of the first insulating layer, a second conductive layer provided on a second surface of the first insulating layer, a second insulating layer covering the second surface and the second conductive layer, and a first adhesive layer adhering the second insulating layer to the second surface and the second conductive layer. The first conductive layer has a first land. A plurality of first through holes are provided in a first portion of the second conductive layer that overlaps the first land via the first insulating layer. The first adhesive layer adheres to the second surface through the plurality of first through holes. The electronic component has a first pin bonded to the first land.

A disk device is provided to improve the performance of multiple actuators. The disk device according to the embodiments has two or more independently driveable actuator blocks, performing low-jerk seek control with limited jerk (i.e., accelerometer). The disk device is characterized in that, when the first actuator block does not access a data sector of the disk, a second actuator block, not the first actuator block, accesses a data sector of the disk through high-jerk seek control.

According to one embodiment, a disk device includes a disk-shaped recording medium, a magnetic head including a write head, a read head, and a heater configured to adjust a gap between the magnetic head and the recording medium, a suspension assembly supporting the magnetic head, a micro actuator including a piezoelectric element on the suspension assembly, and a controller configured to set a drive voltage of the piezoelectric element in accordance with a difference between a touchdown output in time of driving the piezoelectric element and a touchdown output in time of non-driving the piezoelectric element.

According to one embodiment, a disk device includes a recording medium, a magnetic head including a recording head, an assist element, and a heater, and a controller including a heater voltage supply circuit, a drive voltage supply circuit configured to supply a drive voltage to the assist element, and a contact detection circuit. The controller adjusts a set value of the drive voltage based on an amount of protrusion of the assist element when contact is detected by the contact detection circuit.

One embodiment aims to provide a disk device that can properly back up data. [Solution] According to one embodiment, a disk device is provided having a disk medium, volatile memory, and a controller. The disk medium is on which first data is written. The first data includes an encryption key. The volatile memory is capable of temporarily storing second data. The controller includes a processor and non-volatile memory. The processor encrypts the second data with the encryption key when the power is cut off. The non-volatile memory stores the encrypted second data when the power is cut off.

A hard disk device includes a storage unit and a control unit. The control unit is able to perform a reception step, an update step, an initialization range identifying step, and an initialization executing step. The initialization range identifying step is a step of identifying an initialization range of control information. The initialization executing step is a step of executing initialization of the control information in the initialization range when there is the initialization range. The updated firmware includes an identification table indicating the initialization range. The initialization range identifying step is a step of identifying the initialization range on the basis of the identification table.