241 results about "Magnetic disks" patented technology

Embodiments of the invention provide a write head for perpendicular recording in which the magnetic field intensity applied at a read element is reduced with larger write-field gradients and the distance between a write element and a read element is small. In one embodiment, a pair of magnetic bodies for shielding a read element are provided on the leading and trailing sides of the read element respectively and whichever one of the two shields is the longer in the length from the air bearing surface is shorter than the length up to the back contact position PBK at which a main pole and an auxiliary pole are connected.

The application discloses a database pre-write log adaptive disk brushing scheduling method and device and medium, belongs to the technical field of database system data storage, and is used for solving the technical problems that the pre-write log disk brushing strategy of the existing database cannot adapt to different transaction load scenes, the disk synchronization overhead is high, the throughput capacity is limited, and the resource utilization rate is low. The method comprises the following steps: acquiring the transaction submission rate of a target database system within a preset time window; determining the pre-write log generation rate according to the log sequence number change amount of the target database system; predicting the system load state of the target database system based on the transaction submission rate and the pre-write log generation rate; dynamically matching the corresponding pre-write log disk brushing strategy according to the system load state; and controlling the target database system to perform the disk brushing operation according to the pre-write log disk brushing strategy.

The application provides an automatic disk IO method based on structural mechanics CAE simulation software, comprising the following steps: S1, constructing a memory-disk cooperative computing framework, and dynamically monitoring a data access state in a simulation solving process; S2, automatically exchanging non-active core data structures to a high-performance disk according to a data access frequency, a life cycle and a memory pressure; S3, loading back to the memory on demand when subsequent calculation needs to access the data exchanged to the high-performance disk; wherein the core data structures comprise a stiffness matrix, shape function data, an intermediate result vector and derivative physical quantities, and the exchange process is transparent to the solver. According to the application, the exchange process is highly transparent to the core computing logic of the solver, is automatically managed by the system, and does not need user intervention, so that efficient utilization of memory resources and stable operation of super-large-scale model simulation are realized.

A kernel of an operating system receives a request from a parent process (e.g., an exec or spawn system call) to launch a child process that executes a binary. The kernel identifies a process-specific launch constraint, which is a precondition for launching the child process. The kernel evaluates the constraint, which can match against any type of system state or variable, including the process's location on disk, protection on disk, and how the process is to be launched. The kernel can then determine whether to launch the child process, thus permitting the child process to be scheduled for execution by the operating system. Launch constraints can be used both for a child process to impose preconditions on the parent process, and vice versa. Launch constraints can be included in the launch request, embedded in the binary, or located elsewhere, such as in a trust cache in kernel memory.

This invention relates to the field of data processing and discloses a database log archiving method, apparatus, device, and medium, comprising: identifying a target redo log file to be archived from the database; creating a preliminary redo log file with the same attributes as the target redo log file and empty content within the same logical disk as the target redo log file; moving the target redo log file to a preset archiving directory located within the same logical disk via MV operations; changing the filename and storage path of the preliminary redo log file to the original filename and storage path of the target redo log file via MV operations; and mounting the revised preliminary redo log file to the database. This invention solves the problems of high I / O consumption and low archiving efficiency in existing database log archiving technologies.

To provide an aluminum alloy substrate for a magnetic disk, in which generation of microscopic defects is reduced without significantly changing manufacturing steps, and a manufacturing method thereof.SOLUTION: An aluminum alloy substrate for a magnetic disk has two or more Ni-P plating layers continuously laminated. The two or more Ni-P plating layers respectively have the same component composition. In addition, the Ni-P plating firm is formed using an electroless Ni-P plating solution containing the same concentration of P.SELECTED DRAWING: None

The present application discloses a load-balanced collaborative repair method and device for coded data, and relates to the technical field of data storage and recovery. The method include performing encoded collaborative repair on data of a damaged disk using a collaborative repair algorithm BROR according to characteristics of the damaged disk and data characteristics of intact disks; and calculating locations of data required to be transmitted by each disk using a load balancing algorithm BROR-LB based on encoded collaborative repair results, implementing data balance among nodes, and completing load-balanced collaborative repair of coded data. The present application solves problems of low data recovery efficiency and unbalanced system load in large-scale storage systems.

This application provides a data export method, apparatus, device, and storage medium, relating to the field of storage technology. The method includes: after establishing a connection with a target device via a USB interface, sequentially copying the storage information in the first N sectors of the disk to the target device through a global memory variable; after the storage information copying is complete, converting the data in the first data sector into document data and storing it in the global memory variable; when reading the target document, first copying the document data of the first data sector from the global memory variable to the target device, then sequentially converting the data in subsequent data sectors into document data and copying it to the target device through the global memory variable, until the target document export is complete. This application utilizes a global memory variable to flexibly and dynamically export documents according to the file system specifications, without requiring additional disk storage space to store the generated documents, significantly saving hardware costs.

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.

This utility model relates to the field of motor structure technology, and in particular to a motor with a connector structure, including a motor housing, a connector base shell, a disk, and a circuit board; the motor housing has at least two mounting holes at one end facing the connector; the inner wall of the connector base shell has at least two snaps, which correspond one-to-one with the mounting holes and are locked together to fix the connector base shell to the motor housing, and the connector base shell has a plug-in cavity for accommodating external plugs; the disk is fixedly installed on the side of the motor housing away from the drive end; the circuit board is installed on the inner wall of the connector base shell and has connection terminals for electrical contact with external plugs; wherein, when an external plug is inserted into the plug-in cavity, the plug and the connection terminals of the circuit board form an electrical connection; compared with the prior art, by using a snap-fit ​​and mounting hole locking connection between the connector base shell and the motor housing, complex welding processes and multiple alignment and fixing of multiple components are eliminated, greatly simplifying the assembly process.

The application provides a bearing inner ring raceway grinding device and a grinding method, and belongs to the technical field of bearing grinding. The bearing inner ring raceway grinding device comprises a machine tool and a machining table arranged in the machine tool, and further comprises: a feeding and discharging assembly arranged on the machining table, wherein the feeding and discharging assembly comprises a placing plate, and a magnetic disc is rotationally arranged on the placing plate; and a limiting support assembly arranged on the machining table, wherein the limiting support assembly comprises a limiting frame, a driving rod is rotationally arranged on the limiting frame, and a sliding rod is slidably arranged on the driving rod. The inner ring main driving rotation is driven by the magnetic disc, and slight contact is achieved between the supporting roller and the inner wall of the inner ring. When the inner ring deviates, the supporting roller can synchronously rotate and assist in maintaining the stable rotating speed of the inner ring, and dynamic compensation is achieved in cooperation with the floating support, so that the problems that the bearing is prone to deviation, rotating instability and even stop in the process of electromagnetic centerless floating grinding in the prior art are solved.

This application provides a method, apparatus, device, and storage medium for determining disk temperature, relating to the field of disk security technology. The method includes: for each disk in a disk storage enclosure, first acquiring the heat dissipation information of the slot where the disk is located and the corresponding disk utilization rate; and based on the heat dissipation information of the slot where each disk is located and the corresponding disk utilization rate, selecting multiple candidate disks from all disks in the disk storage enclosure; determining a target temperature based on the temperature of each candidate disk; wherein the target temperature is used for temperature regulation of the disks in the disk storage enclosure. The technical solution of this application can solve the defect in the prior art where the target temperature determination cycle is long, resulting in a lag in the determined target temperature, thereby improving the timeliness of the determined target temperature.

Embodiments of the present disclosure provide a data read / write method, system, and apparatus, a computing device, and a storage medium. The data read / write method comprises: receiving, by means of an asynchronous I / O layer, a data read / write request sent from a user space, and storing the data read / write request in a request queue; when the asynchronous I / O layer determines that the data read / write request is of a pass-through type, sending the data read / write request to a driver layer; and parsing the data read / write request by means of the driver layer, and sending request information of the data read / write request to a target processing end device for read / write processing. The data read / write request sent from the user space is received by means of the asynchronous I / O layer, and is sent to the driver layer after the data read / write request is determined to be of the pass-through type, thereby reducing context switching and data copying overhead, and improving the processing efficiency of I / O operations. The request is parsed at the driver layer and sent to the processing end device for read / write processing, thereby optimizing the scheduling of I / O tasks, reducing disk addressing time and I / O latency, and improving overall performance and system stability.

This utility model discloses a clamping device for processing magnetic disks, relating to the field of magnetic disk processing technology. The clamping device includes a clamping plate with a first guide groove inside. A second guide groove is formed on the first guide groove. Three sets of the first guide grooves are symmetrically arranged within the clamping plate. Each of the three sets of first guide grooves has a mounting component, and a clamp is mounted on the upper end of each mounting component. An adjusting device is provided between the three sets of clamps. A limit block is provided on the upper end of the adjusting device, and a limit plate is provided on the upper end of the limit block. The adjusting device includes a second threaded rod, a lifting block, a connecting rod, a first connecting seat, a first bevel tooth, and a second connecting seat. The second threaded rod is located at the lower end of the limit block, and a lifting block is located inside the second threaded rod. This solution addresses the problems of inconvenient processing and low installation efficiency.

This invention belongs to the field of storage system operation and maintenance technology, specifically relating to a health monitoring method for server storage systems. The method includes: collecting request stream data from a target disk to obtain input / output request rate sequences and input / output latency sequences; dividing time windows and obtaining load resilience characteristics based on the transient increase in input / output latency and the transient decrease in input / output request rate; synchronously collecting the surface temperature of the physical media to obtain temperature fluctuation characteristics, thereby determining the hysteresis degradation index of the target disk; calculating a health score based on the hysteresis degradation index and a benchmark degradation index, and performing early warning and storage scheduling operations. This invention can accurately capture underlying hidden performance degradation, effectively eliminate short-term performance jitter interference, and improve the operational reliability and data security of the storage architecture.

The present technology enhances workload management of data storage systems by using an internal copy function and / or a zone-append technology. The internal copy function is used, e.g., in merge operations to move data between locations on a disk without using off-disk resources (e.g., processing or memory of a CPU). Zone-append technology uses nameless writes (e.g., write instruction without an assigned destination address on the disk) to combine IO units from different threads to be written to a common zone of a disk (e.g., a shingled magnetic recording (SMR) disk). Sequential addresses are assigned to IO units from different threads based on their order in the write queue, reducing the latency and seek time typically associated with random writes. The zone-append technology, e.g., uses sequential write operations within specified zones, allowing the disk to determine the actual write location and to report post-write logical block addresses (LBAs).

This invention belongs to the field of information technology and relates to a method and system for merging time-series data files optimized for solid-state drives (SSDs). The method includes: parsing time-series data into time-series keys and values; writing the values ​​into a time-series data log file on the SSD; writing the address index of the value in the time-series data log file and the time-series key into a log structure merging tree as key-value data; merging the time-series data log files; and controlling the amount of data involved in the merging process by utilizing the amount of data for each key-value data recorded in the log structure merging tree within the time-series data log file. This method writes data from the first level to the Nth level to the N+1th level in a single file merge. By controlling the number of time-series keys involved in the merging, the amount of data involved in the merging is controlled, thereby controlling the CPU and disk I / O resources used, reducing the impact on the foreground system's write and query operations, reducing system performance fluctuations, and reducing tail latency.

The present invention provides a secure method for outsourcing data analysis to a third party without the third party being able to access the data in clear. In the present invention, the client's data is never written to disk, this feature provides the security. The data is decrypted and processed in the enclave which ensures that the data is secure and hidden at all times when it is visible “in clear”.

The application provides a performance optimization method and system for online cross-storage migration of a virtual machine, which comprises two parts of optimization for a raw format disk and optimization for a qcow2 format disk. After the execution of the seek data and hole once, the corresponding positions are recorded in the optimization for the raw format disk; in the optimization for the qcow2 format disk, the corresponding L2Table is checked only when the L2Table is loaded and flushed. Through the optimization of the migration logic of the disks in the raw and qcow2 formats, the application reduces the influence of the online cross-storage migration on the performance of the virtual machine. The application optimizes the functions that are particularly time-consuming in the online cross-storage migration, improves the efficiency, reduces the influence on the performance of the virtual machine, and improves the user experience.

The present disclosure relates to an image processing method and device, electronic equipment and readable storage medium, wherein the method determines the storage mode of the first image by analyzing the proportion of the difference image block corresponding to the first image in the image editing process, and the snapshot type of the last N snapshots in the snapshot chain generated according to the continuous image editing instructions, so as to reasonably reduce the disk storage space occupied by the snapshots and reduce the time consumption of the electronic equipment executing the user inputted undo editing instruction.

This application provides a data storage management method, apparatus, device, and storage medium, relating to the field of database technology. In this method, the database system's index file, log file, and multiple data files are all stored in non-volatile memory. Thus, when an operation instruction for an original data record in the database is received, the original data record is directly located from the multiple data files using the index file, and an operation transaction is executed on the located original data record. Upon successful execution of the operation transaction, the transaction number is added to the log file. Since updates to the index file, data file, and log file in non-volatile memory can be immediately persisted without needing to be flushed to disk, the additional time and resource overhead of migrating data between different storage media is avoided. This also improves data write and read speeds, meeting the real-time data read and write requirements of various application scenarios.

A substrate for a magnetic disk, characterized by being composed of an aluminum alloy containing one or two or more of Fe: 8.5 mass% or less, Mn: 2.5 mass% or less, Ni: 6.5 mass% or less, and Mg: 4.5 mass% or less, with the remainder composed of Al and unavoidable impurities, a resonance frequency being f (Hz), a density being p (g / cm 3 ), and a plate thickness being t (mm), (f x p / t) being 3800 or more, and a magnetic disk using the substrate for a magnetic disk.

The present application relates to the technical field of data processing, and relates to a data shunting collection and adaptive storage method and system based on a heterogeneous SoC, to solve the problems of excessively high CPU load and large storage delay when multiple sensors are accessed. The present application accesses multiple sensors at the PL end of a heterogeneous SoC and caches data, sets a shunting threshold to divide the data stream into a high-speed data stream and a low-speed control stream channel, and uses corresponding interfaces for processing to reduce bus load; a logical ring buffer is constructed in the PS end DDR memory, the number of DMA transmission blocks is adjusted according to the occupancy, and after adaptive storage of data is completed in three modes of low delay, standard batch, and extremely fast continuity, the disk read pointer is updated, the buffer area of completed disk writing is released, and the PL end is provided with a new data cyclic writing function. The present application realizes efficient and low-loss storage of a large data stream of multiple sensors through the synergistic effect of a heterogeneous SoC, improves data collection continuity and storage reliability, and prolongs the service life of the storage device.

This invention provides a rotor structure, its molding method, and a motor. The rotor structure includes: radial plastic magnets (6), with multiple radial plastic magnets (6) arranged circumferentially at intervals, forming mounting grooves (5) between adjacent radial plastic magnets (6); tangential ferrites (2), disposed within the mounting grooves (5) and used to form a tangential magnetic field; axial plastic magnetic disks (4), disposed at both axial ends of the radial plastic magnets and used to form an axial magnetic field; and a plastic-coated shell (1), encasing the radial plastic magnets (6), tangential ferrites (2), and axial plastic magnetic disks (4), and injection molding the radial plastic magnets (6), tangential ferrites (2), and axial plastic magnetic disks (4) into a single unit. According to the rotor structure of this invention, the assembly difficulty of the rotor structure can be reduced, the assembly effect improved, and the working performance and reliability of the motor guaranteed.

This invention provides a controller and storage device that can suppress data loss even when reconfiguring storage media in a RAID configuration. [Solution] The controller of this embodiment is a controller that reads and writes common data to the first and second physical disks to configure a logical disk, and is capable of executing disk input / output requests to the first and second physical disks in response to disk input / output requests to the logical disk received from a host computer. This controller includes, for each of the first and second physical disks, an area setting unit that sets a data area to be the target of disk input / output requests and a spare area on which data recorded in the data area can be recorded; a monitoring unit that monitors the status of each of the first and second physical disks; and a maintenance processing unit that, if an error in the first physical disk is detected as a result of monitoring by the monitoring unit, writes the data in the data area of ​​the first physical disk to the spare area of ​​the second physical disk.

The utility model discloses a quick -wearing formula magnetism sucking disc relates to magnetic fixture technical field, including the bottom plate of being fixed on the workbench through screw, the bottom plate is placed with the disk body, and the disk body both sides are fixedly connected with the connecting plate, is equipped with the pressing plate on the connecting plate, and the pressing plate is installed with locking mechanism symmetry on. The locking mechanism includes the locating pipe, the lock core column, the spring, the stop head and the clamping ball, and the locating pipe penetrates the pressing plate, the connecting plate and the bottom plate, and the bottom plate is equipped with the connecting hole and the annular groove, when the lock core column resets under the spring effect, the clamping ball embeds the annular groove and realizes locking, and the lock core column is pressed and then removes the locking. The structure cooperates through the pressing plate and the locking mechanism, realizes the quick connection and disassembly of disk body and bottom plate, improves the assembly efficiency and the positioning accuracy, has simple structure, convenient operation, locking reliable advantage, is applicable to the quick clamping operation under a variety of working conditions.

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.

The present application relates to the technical field of computer data storage, and particularly provides a data storage method and device, electronic equipment and storage medium, aiming at solving the problem of consuming a large amount of cpu and disk io when using the existing B+ tree to flush. To this end, the data storage method comprises: constructing a database data layer, containing a plurality of shard pages, and storing complete KV key-value pair data on each shard page; constructing a database index layer, storing index information of the KV key-value pair data stored in the database data layer, the index information being stored in a tree structure, including a split key of each shard page as an index key, and ID information of the shard page corresponding to each split key as an index value. The present application stores data and index separately by constructing the database data layer and the index layer, so as to improve performance and reduce resource consumption.

The utility model relates to magnetic scale installation technical field especially relates to a vertical magnetic constant force linear module with load balance structure, including the base plate, the base plate top end is installed with a pair of mutually parallel slide rails, a pair of slide rails between the installation has the magnetic disk, the magnetic disk is fixedly connected on the top of base plate, the outside slide of slide rail is equipped with the sliding block, the sliding block top fixedly connected with the moving block for load balance, a pair of slide rails opposite inboard all are equipped with the guide rail, the guide rail inside slide sets up the magnetic scale, through the bolt and installs the guide rail to the inboard of slide rail, makes the customer adjust the length according to the demand, oneself can just be the magnetic scale slide installation in the slide rail inside, realizes the equipment flexible assembly.

This application discloses a method, apparatus, device, and storage medium for predicting server computing power idleness, relating to the field of server monitoring technology. The method for predicting server computing power idleness in this application first acquires server status indicator data for a target historical period; wherein, the status indicator data includes CPU utilization, memory utilization, GPU utilization, network bandwidth information, network input / output data, and disk status information; then, based on the server status indicator data for the target historical period, the indicator idleness degree for the target historical period is calculated; subsequently, based on the indicator idleness degree of the target historical period and a preset indicator idleness weight, the server computing power idleness degree for the target historical period is calculated; finally, based on a prediction model, the server computing power idleness degree for a target future period is predicted according to the server computing power idleness degree of the target historical period. This application can achieve accurate prediction of server computing power idleness.