3096 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 invention relates to the technical field of data storage, in particular to a dynamic data distribution storage method and system for an RAID (redundant array of independent disks), and the method comprises the following steps: based on the access frequency of data blocks in a disk, recording the access frequency and timestamp of each data block, carrying out heat rating on the data blocks, and determining thresholds of hot data and cold data. According to the method, the dynamic distribution of data storage is effectively optimized by analyzing the access frequency of the data blocks, and the performance and the economic efficiency of a storage system are remarkably improved by migrating the frequently accessed data to the cache disk and migrating the less accessed data to the low-cost storage; according to the method, unnecessary occupation of high-performance storage resources is reduced, the operation cost is also reduced, heat rating is performed on the data blocks, and the storage positions of the data blocks are correspondingly adjusted, so that the data processing speed is higher, meanwhile, the data security is improved, when a hard disk fails, data recovery is faster, and the service continuity is ensured.

The invention discloses a data read-write request processing method, electronic equipment, a storage medium and a program product, and relates to the technical field of redundant arrays of independent disks, and the data read-write request processing method comprises the following steps: if the category of a data read-write request is a random read request, if target data corresponding to the random read request does not exist in a target cache, executing the random read request; the random read request is directly issued to a corresponding redundant array of independent disks for processing, and pre-read processing is not carried out; if the category of the data read-write request is the random write request, the random write request is stored by using the random write cache and the random write backup cache, and when the proportion of the random read-write request is less than the preset proportion threshold, the random write request is issued to the corresponding redundant array of independent disks for processing, and the random write request does not need to be merged; and the number of the random write requests issued in a centralized manner is reduced, the technical problem that the performance of the storage system is reduced by a mode of processing the random read-write requests in related technologies is solved, and the technical effect of improving the performance of the storage system is achieved.

A pair of waveform disks for use in a disk-pack turbine used, for example, in systems and methods in at least one embodiment for separating fluids including liquids and gases into subcomponents by passing the fluid into an expansion chamber and then through at least a portion of a waveform pattern present between at least two disks. The disks having waveform patterns on at least one side.

The invention discloses a channel model dynamic association method based on a multi-source data index, and relates to channel engineering digital management. The channel model dynamic association method comprises the steps that component codes of channel engineering are constructed and used for identifying the same physical entity; establishing a three-layer index table structure according to the component codes; constructing a dynamic partition management mechanism of a three-level cache architecture, wherein the three-level cache architecture comprises a first-level cache stored in a memory, a second-level cache stored in a local disk and a third-level cache stored in a distributed manner; according to data access information in the three-layer index table structure, data migration is carried out among all levels of caches; according to the dynamic partition management mechanism, a data version management mechanism based on a timestamp concurrency control protocol is established, the data version management mechanism generates incremental data by comparing original data with updated data, and incremental updating or full updating is selected according to a threshold value. According to the method, the problem that data evolution tracking is difficult due to fragmentation of multi-source heterogeneous data and unbalanced access efficiency in navigation channel engineering is solved.

The invention discloses a small file distributed high-concurrency aggregation storage method and system, and the method comprises the steps: collecting performance index data, and transmitting the data to a resource coordination server; calculating a queuing rate; determining a target server according to the queuing rate, the file reading concurrency and the disk residual space; determining a first-level directory hash value; selecting a first-level storage directory and a second-level storage directory according to the first-level directory hash value; creating a target aggregation file in the secondary storage directory, generating a 2-byte file format field according to the compression identifier or the non-compression identifier, and generating a 4-byte file length field according to the size of the to-be-written file; writing the file format field, the file length field and the to-be-written file into a target aggregation file in sequence, and recording the initial offset of writing; and generating a file name containing the storage position information, and returning the file name to the client. According to the invention, the efficiency and effect of small file storage are optimized.

The invention provides a magnetic sheet surface defect detection method based on an improved target detection model. The method comprises the following steps: constructing a defect detection model based on a YOLO11n basic network model; the backbone network comprises at least one convolution module, at least one C3k2Her module combined with an edge refining structure and a layered edge refining structure, a spatial pyramid pooling fast module and a C2PSA module combined with a cross-stage local structure and a pyramid extrusion attention mechanism; the neck network is constructed based on a path aggregation feature pyramid network structure and has a multi-layer feature pyramid structure for processing a low-layer feature map to be fused to a higher-layer feature map, and the neck network further comprises at least one C3k2FFCM module combined with a cross-stage local structure and a fused Fourier convolution mixer module; training the defect detection model; performing defect detection; and outputting the surface defect information. According to the invention, the detection precision and efficiency of the surface of the magnetic sheet, especially small defects under low contrast and complex backgrounds, are improved.

In one aspect, a highly scalable diffusion-couple apparatus includes a transfer chamber configured to load a wafer into a process chamber. The process chamber is configured to receive the wafer substrate from the transfer chamber. The process chamber comprises a chamber for growth of a diffusion material on the wafer. A heatable bottom disk includes a first heating mechanism. The heatable bottom disk is fixed and heatable to a specified temperature. The wafer is placed on the heatable bottom disk. A heatable top disk comprising a second heating mechanism. The heatable top disk is configured to move up and down along an x axis and an x prime axis to apply a mechanical pressure to the wafer on the heatable bottom disk. While the heatable top disk applies the mechanical pressure, a chamber pressure is maintained at a specified low value. The first heating mechanism and the second heating mechanism can be independently tuned to any value in the working range.

A base plate includes a support part, a bottom plate part, and a wall part. The wall part includes a first wall part and a second wall part above the first wall part. The first wall part includes a first wall surface and a support surface spreading from an upper end of the first wall surface to a radially outer side. The second wall part includes a second wall surface and a recess recessed to the radially outer side from the second wall surface. The recess is defined by a space enclosed by a recess wall surface located on the radially outer side of the second wall surface and extending upward from the support surface, a recess top surface connecting from an upper end of the recess wall surface to the second wall surface, and a recess support surface facing the recess top surface in an axial direction.

The invention discloses a garbage collection method and device, equipment and a storage medium, and relates to the technical field of electrical digital data processing.The method comprises the steps that when metadata of a cache pool is updated, internal object abstracts corresponding to the metadata are put into a garbage collection queue; according to the water level condition of the data pool and the disk utilization rate of the object storage device of the data pool, the single-round execution task number of the garbage collection queue is determined; according to the number of single-round execution tasks of the garbage collection queue and the garbage collection priorities of the internal objects, the internal objects are selected to execute garbage collection, so that effective data in the internal objects are aggregated into new internal objects, and the internal objects subjected to garbage collection are deleted, namely, the situation that the water level of the current data pool is too high, and the garbage collection efficiency is improved is avoided. And the overlarge disk utilization rate of the object storage equipment is avoided, and the two are balanced, so that the influence on other businesses is avoided as far as possible on the basis of ensuring the normal recovery of the garbage.

The invention discloses a path isolation method, electronic equipment, a storage medium and a product, and relates to the technical field of network communication, and the method comprises the steps: obtaining the first time consumption of each path in a plurality of paths, the first time consumption being used for indicating the read-write response time consumption of the path; determining a target path in the plurality of paths based on the first time consumption of each path in the plurality of paths; and in response to the fact that the first deviation frequency corresponding to the target path in the first preset time window is greater than the preset deviation frequency, isolating the target path, thereby solving the technical problem that a path with poor link quality cannot be isolated in a related scheme, achieving the purpose of isolating a path with poor link quality but not having read-write overtime or read-write failure, and improving the reliability of the path. And the influence of the path with poor quality on the disk performance is avoided.

A novel magnetic type mobile phone holder is provided, including a base, wherein a balancing weight is arranged in the base; a lower holder, wherein one end of the lower holder is in rotatable fit with the base; a first abutment portion is arranged on the lower holder; the first abutment portion can cooperate with the base to fix the mobile phone holder to display equipment; an upper holder, wherein the upper holder is in rotatable fit with one side of the lower holder away from the base; and a magnetic disk holder, wherein the magnetic disk holder is detachably fitted to one side of the upper holder away from the lower holder.

In various examples, data storage is managed using a distributed storage management system that is resilient. Data blocks of a logical block device may be distributed across multiple nodes in a cluster. The logical block device may correspond to a file system volume associated with a file system instance deployed on a selected node within a distributed block layer of a distributed file system. Each data block may have a location in the cluster identified by a block identifier associated with each data block. Each data block may be replicated on at least one other node in the cluster. A metadata object corresponding to a logical block device that maps to the file system volume may be replicated on at least another node in the cluster. Each data block and the metadata object may be hosted on virtualized storage that is protected using redundant array independent disks (RAID).

The invention discloses a data deduplication method and device, electronic equipment, a storage medium and a product. The method comprises the following steps: under the condition that data to be subjected to duplicate removal is obtained, inserting the data to be subjected to duplicate removal into a first hash table for performing hash duplicate removal until the data in the first hash table reaches a target number of rows, and outputting the data in the first target number of rows in the first hash table; under the condition that the first hash table is not full, continuing to insert the data to be subjected to duplicate removal into the first hash table for performing hash duplicate removal until the first hash table is full; under the condition that the first hash table is full, repeated detection is carried out on the data to be subjected to duplicate removal and existing data in the first hash table, and the data to be subjected to duplicate removal, which are judged to be non-repeated, are subjected to disk brushing; and under the condition that the processing of the data to be subjected to duplicate removal is completed, performing duplicate removal processing on all the data in the disk, outputting the data, and outputting the data except the data in the previous target number of rows in the first hash table. According to the scheme, the previous target number of rows of data obtained through duplicate removal can be returned in advance, and the user experience can be improved.

The invention relates to the field of data acquisition, and discloses a mechanical arm data acquisition labeling method and system, and the method comprises the steps: transmitting a control instruction to a mechanical arm, and receiving the state data of the mechanical arm; a local view angle image of the mechanical arm and a global view angle image of the mechanical arm are synchronously obtained, and the local view angle image and the global view angle image comprise an RGB image and a depth image; performing timestamp alignment on the mechanical arm state data, the local view angle image of the mechanical arm and the global view angle image of the mechanical arm, and storing the data in a disk in real time to obtain time sequence data; and performing fragment selection, text description and attribute marking on the time series data. According to the method, collection and labeling guidance for specific task scenes is provided, and data consistency and task correlation can be guaranteed.

The embodiment of the invention provides a metadata asynchronous disk refreshing method based on a data stock calculation separation architecture, which comprises the following steps: receiving a modification instruction of target metadata in a shared storage node, locking the target metadata according to the modification instruction, and modifying the target metadata in a shared memory of the shared storage node; constructing a data log of the target metadata operation, and writing the data log into a disk; copying the modified target metadata into a memory pool, mounting the modified target metadata into a task queue of a background metadata disk brushing thread, and unlocking the modified target metadata; performing disk refreshing operation on the modified target metadata in the memory pool through a background metadata disk refreshing thread according to a task sequence mounted in the task queue; and after the modified target metadata is brushed, data logs in the disk are emptied. According to the embodiment of the invention, the holding time of the lock in the metadata modification process is shortened, and the lock conflict time is shortened.

The invention relates to the technical field of data storage, and discloses a CSD-based key value database storage method and system, and the method comprises the steps: responding to a user inserting a key value pair into a key value database, storing the key value pair into a memory table, and converting the memory table into an immutable memory table after a preset triggering condition is satisfied; aligning and coding the key value pairs in the immutable memory table according to a uniform length to generate key value pairs with fixed step lengths; calling a computing storage device to automatically compress the key value pair with the fixed step length and flash the key value pair into an SSTable file; receiving a merging operation triggering instruction, and controlling the computing storage device to obtain the SSTable file and decompress the SSTable file; and calling the graphic processing unit to merge the decompressed files to generate a new SSTable file, and calling the computing storage device to automatically compress the new file and flash the new file to a disk. According to the method, the read-write throughput and merging efficiency of the key value database are remarkably improved, and the problems of write blockage and write pause are effectively relieved.

Implementations of the present specification provide a data writing, data recovery, and data reading method, and a corresponding secure disk apparatus. The data writing method includes following: User data blocks are first written into a write cache, and a plurality of user data blocks identified by LBAs are read from the write cache under a certain condition. For each user data block, an HBA is allocated to the user data block, authenticated encryption is performed on the user data block to generate an encrypted data block and authentication information, and first metadata corresponding to the user data block is generated, where the first metadata is organized in a form of a KV pair and includes the LBA, the HBA, and the authentication information. A plurality of write commands for the plurality of user data blocks are submitted to a host disk for the disk to store the encrypted data block based on the corresponding HBA. In addition, the first metadata corresponding to each user data block is further written into a first metadata table maintained by using an LSM tree. Then, a synchronization operation command is sent to the LSM tree and the host disk for the LSM tree and the host disk to complete data write persistence.

The invention discloses a disk data encryption and decryption method and device, equipment and a storage medium, and relates to the technical field of information security, and the disk data encryption and decryption method comprises the following steps: sending a first key to a volume encryption application component through a virtual computing node controller program by using a virtual encryption volume constructed based on a created virtual machine mirror image; triggering an encryption and decryption thread handle pool creation process by using an encrypted second key obtained based on the first key through the volume encryption application component; when encryption task information is received through the password management component, determining a first target password computing resource chain table based on an encryption and decryption thread handle pool corresponding to the encryption task information, and performing data encryption by using a resource chain table scheduling rule and the first target password computing resource chain table to complete disk data writing; when decryption task information is received through the password management component, the resource chain table scheduling rule and the second target password are used for computing the resource chain table for decryption, and data reading is completed. And the encryption and decryption efficiency is effectively improved.

The invention discloses a model loading method and device, a storage medium and electronic equipment, and relates to the technical field of computers. Data information of tensor data of a to-be-loaded model is determined according to model head information of the to-be-loaded model; the tensor data can be loaded in parallel into the shared memory of the target node of the model through the data information, and then the tensor data stored in the shared memory is mapped into the target process for loading the to-be-loaded model, so that the to-be-loaded model can be loaded through the target process. As the tensor data can be loaded into the shared memory in parallel and then mapped into the target process capable of loading the to-be-loaded model, large-scale parallel loading can be realized, the model can be directly loaded from the shared memory, and the model data does not need to be read from a disk, so that the loading efficiency of the model is improved. The technical problem of low model loading efficiency can be solved, and the technical effect of improving the model loading efficiency is achieved.

A storage device may carve out redundant array of independent disks (RAID) and reduce write amplification when writing data to the RAID. The storage device includes multiple flexible data placement drives that are configured to execute RAID techniques. A controller on the storage device may receive data from a host. The controller obtains reclaim unit handles from the data to determine locations where the data is to be stored on the flexible data placement drives. During storage, the controller stripes the data in parallel across reclaim units within different reclaim groups and endurance groups across a single flexible data placement drive or multiple flexible data placement drives. The storage device leverages the write amplification of the flexible data placement drives to reduce a write amplification factor on the RAID.

The invention discloses an abnormal data positioning method and device, equipment, a program product and a storage medium, belongs to the field of redundant arrays of independent disks, is used for positioning a disk where abnormal data is located in a stripe, and solves the problem that the disk where the abnormal data is located cannot be positioned. In consideration of the fact that in a target stripe with abnormal data, if a check chain with a zero calculation result exists, it is indicated that each business data block is normal, and at the moment, a disk corresponding to a check chain with a non-zero calculation result is a disk where the abnormal data is located, so that the target stripe with the abnormal data can be subjected to the non-zero calculation, and the abnormal data can be stored in the target stripe. According to the method and the device, the check chain calculation result of each check chain is determined, and if the check chain calculation result part is zero, the disk corresponding to the check chain of which the calculation result is not zero can be used as the disk where the abnormal data is located, so that the disk where the abnormal data is located can be efficiently and accurately positioned, the abnormal data can be conveniently recovered, and the user experience is improved.

The invention discloses a data processing method and device, electronic equipment, a storage medium and a product. The method comprises the steps of obtaining a disk dynamic mapping request; in response to the disk dynamic mapping request, a data repair migration task is generated, and the data repair migration task is used for triggering disk dynamic mapping and data repair migration processes of the erasure code redundant group; and executing the data restoration migration task.

According to one embodiment, a disk device includes a disk-shaped recording medium, an actuator assembly provided to be rotatable and supporting a magnetic head, and a first stopper and a second stopper, arranged contactable with the actuator assembly. At least one of the first stopper and the second stopper includes a cushioning member having a contact surface contactable with the actuator assembly, and a gas adsorption member provided to surround the cushioning member except for the contact surface.

The invention discloses a white list state synchronous processing method and system combined with database transaction control, and relates to the technical field of database transaction control and data synchronous processing. The method comprises the following steps: recording a white list state change event based on a pre-writing mechanism of a database transaction log; change events in a transaction log are classified and aggregated according to a white list and then are asynchronously written into a specified buffer area, when a transaction is submitted, the sequence of data in the buffer area is controlled through a lightweight lock mechanism to be refreshed to a physical disk, and the priority of a disk IO queue is dynamically adjusted according to the transaction isolation level to reduce concurrent conflicts; according to the white list state synchronization processing method and system combined with database transaction control, the transaction concurrent processing performance and the database response efficiency are remarkably improved, and the expansion capability and stability of the white list synchronization system in a complex business environment are also improved.

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.

The invention relates to the technical field of storage, and discloses a request submission method and device, computer equipment and a storage medium, and the method comprises the steps: obtaining a plurality of requests, and analyzing the requests to obtain identification information, operation types and operation position information of data objects of the requests; determining identification information of a disk corresponding to the data object according to the identification information of the requested data object; obtaining a pressure index value of the target disk according to the identification information of the target disk; when it is determined that the pressure index value is larger than or equal to a preset pressure threshold value and multiple target requests corresponding to the target disk are selected from the multiple requests, the multiple target requests are grouped and merged according to identification information and operation types of data objects of the target requests; summarizing the target number of the requests finally existing in all groups after grouping and merging processing; and according to the target number and a preset number threshold value, submitting the requests finally existing in all the groups to the kernel of the target equipment in batches. According to the invention, the data read-write speed can be improved.

The magnetorheological damping element based on the winding type magnetic circuit built-in piston comprises a hydraulic cylinder and a magnetorheological damper, the hydraulic cylinder comprises a hydraulic cylinder end cover, a hydraulic cylinder barrel, a double-outlet-rod hydraulic piston and a shared end cover, and the magnetorheological damper comprises a damper outer cylinder barrel, the built-in piston, a wire rod and a damper end cover; the hydraulic cylinder and the magnetorheological damper are connected together through the common hydraulic piston and the common end cover; the magnetic isolation disc is installed between the front magnetic conduction block and the rear magnetic conduction block and is jointly arranged in the magnetic conduction cylinder to form a flow channel baffle, and the interior of the built-in piston forms a magnetorheological fluid flow channel through center flow holes of the front end cover and the rear end cover, gaps between the front end cover and the flow channel baffle, gaps between the rear end cover and the flow channel baffle and gaps between the magnetic conduction cylinder and the flow channel baffle. A winding type magnetic circuit is formed by arranging the magnetism isolating part. The structure effectively utilizes a magnetic field through a guide magnetic circuit, can improve the utilization rate of the magnetic field, can provide damping force matched with the hydraulic cylinder, and is compact in structure and small in size.

The invention discloses an axial magnetic flux motor assembly tool and method which are used for assembling a single-stator double-rotor axial magnetic flux motor. The axial magnetic flux motor assembly tool comprises a rack, and a stator tool piece, a first rotor tool piece, a second rotor tool piece and a driving piece which are mounted on the rack. The stator tool piece, the first rotor tool piece and the second rotor tool piece are used for installing a stator assembly, a first rotor assembly and a second rotor assembly respectively, so that the stator assembly, the first rotor assembly and the second rotor assembly are always kept in a stable state, and magnetic disk adsorption force between a stator and a rotor is resisted. The first rotor assembly, the second rotor assembly and the stator assembly are always kept at the same interval in the assembling process, it is ensured that stator and rotor air gaps on the two sides of the stator are consistent, the magnetic attraction force of the rotor assemblies on the two sides to an iron core of the stator assembly is mutually counteracted, and therefore the axial magnetic flux motor high in assembling precision is obtained.

The invention discloses an RDMA Chain-based LSM Tree key value type database access method. The method comprises the following steps: a database client sends a request containing a version number, a key and an operation type to a database server main node; the server main node analyzes the request and processes the request according to the operation type; during write operation, a new serial number is generated, and data is inserted into a skip list of a memory table MemTable; when reading operation is carried out and the version number is smaller than 0, whether a key exists or not is checked through a Bloom filter, if yes, query is carried out at a secondary node through the RDMA technology, and if not, an SSTable file in a disk is directly accessed; and when the reading operation is performed and the version number is greater than or equal to 0, preferentially searching the data of the corresponding version in the MemTable, and if the data of the corresponding version fails, querying the SSTable. Through the RDMA technology, CPU occupation and network round-trip time are reduced, and the response speed and concurrent processing capacity of the system are improved.