66results about "Input/output to record carriers" patented technology

A storage virtualization computer system. The storage virtualization computer system comprises a host entity for issuing an IO request, a storage virtualization controller coupled to the host entity for executing IO operations in response to the IO request, and a at least one physical storage device, each coupled to the storage virtualization controller through a point-to-point serial-signal interconnect, for providing storage to the storage virtualization computer system through the storage virtualization controller. As an example, the point-to-point serial-signal interconnect can be a Serial ATA IO device interconnect.

A method for monitoring according to a hint when allocating a storage volume. When a threshold value violation has occurred, judgement is performed from which use purpose the threshold value derives. The management computer for managing a computer system includes a unit for creating a storage volume according to a hint, a unit for deciding a threshold value for managing the storage volume according to the use purpose of the storage volume, a unit for acquiring a performance value from the storage apparatus, and a unit for comparing the acquired performance value to the threshold value and notifying a warning including a message based on the hint when a threshold value violation is detected.

A device generally comprising a first circuit and a second circuit. The first circuit may be configured to (i) communicate with a host via a first bus (ii) using a small computer system interface (SCSI) protocol having a plurality of command descriptor blocks. The second circuit configured to (i) communicate with a remote device with a via a second bus, (ii) using an advanced technology attachment (ATA) protocol and (iii) translate a subset of the command descriptor blocks to the ATA protocol in application specific hardware.

A method to form one or more premigration aggregates comprising a plurality of least recently accessed virtual volumes disposed in an information storage medium. The method determines the number (R) of virtual volumes to remove from the information storage medium, selects the (R) least recently accessed virtual volumes, forms one or more premigration aggregates comprising those least recently accessed virtual volumes, and assigns each of the (R) selected virtual volumes to one of those premigration aggregates. The method establishes a minimum transfer size and determines if any of the premigration aggregates are larger than that minimum transfer size. The method writes to one or more physical volumes each of the premigrate aggregates that are larger than the minimum transfer size. Thereafter, the method removes from the information storage medium each of the premigration aggregates written to physical volumes.

Data collection agents are assigned to storage area network nodes in a storage area network resource management system, such that the bandwidth and cost of data collection are equitably distributed among data collection agents. Data collection overlaps and load imbalances are eliminated across the data collection agents, creating approximately equal partitions of bandwidth and data collection for each data collection agent. Graph partitioning is used to accomplish load balancing. The assignment of data collection agents to storage area network nodes equitably distributes the bandwidth and processing costs among the data collection agents and ensures a load balance.

A processor contains a move engine and mapping engine that transparently reconfigure physical memory to accomplish addition, subtraction, or replacement of a memory module. A mapping engine register stores FROM and TO real addresses that enable the engines to virtualize the physical address of the memory module being reconfigured and provide the reconfiguration in real-time through the use of hardware functionality and not software. Using the FROM and TO real addresses to select a source and a target, the move engine copies the contents of the memory module to be removed or reconfigured into the remaining or inserted memory module. Then, the real address associated with the reconfigured memory module is re-assigned to the memory module receiving the copied contents, thereby creating a virtualized physical mapping from the addressable real address space being utilized by the operating system into a virtual physical address space. During the process of moving the memory contents, the mapping engine maps Write memory requests addressed to the real address space currently associated with the reconfigured memory module to both the FROM and TO real address space. As will be appreciated, a memory module can be inserted, removed or replaced in physical memory without the operating system having to direct and control the reconfiguration of physical memory to accomplish the physical memory change.

The invention relates to a method and system used for Flash balance storage. The method includes the following steps that first, whether an erase flag exists or not in a current sector in which writing will be performed is checked, and if not, the current sector is formatted, and a flag is set; second, whether data are written in the current sector for the first time or not is checked, if yes, a next sector of the current sector is formatted firstly, the ERASE_FLAG is set, and then a USED_FLAG is written into the sector; third, whether the remaining space of the current sector is enough for writing a current data package or not is judged, and if the space is enough, the data are written into the current position, and the current operating address g_SectorInfo.cur_addr is updated; if the space is not enough, the operation skips into the next sector; fourth, whether the written-in data can pass verification or not is checked, and if not, the operation skips into the next sector, and the first step is executed.

The invention relates to a block access-based flash reading and writing method. The method comprises the following steps of: 1, scanning physical blocks of the flash to acquire corresponding page status tables of the physical blocks; 2, acquiring a partition physical block numbering table; 3, acquiring a partition capacity table of partitions according to the number of partition physical blocks and the number of corresponding effective pages; 4, determining the serial number of the partition accessed by an application layer and the offset in the partition according to the partition capacity table; 5, acquiring the virtual block number and virtual page number of the partition through the offset according to the number of effective pages of the physical blocks in the partition; and 6, acquiring the serial numbers of the physical blocks according to the virtual block number along with the partition physical block numbering table, and acquiring the physical page numbers of the effective pages according to the virtual page number along with the page status table of the physical block. By mapping the physical layers with ineffective pages into a continuous linear storage medium, the effective capacity of the storage medium is maximally extended.

The invention provides a file writing-in method of a SD (Secure Digital) card. The file writing-in process relates to a one-step DMA (Direct Memory Access) transmission process of wiring file data into a continuous physical cluster of the SD card from a discontinuous memory address. The method comprises the steps of: configuring first file transmission information, wherein the first file transmission information comprises initial addresses of multiple sections of file data in the memory and the information of the continuous physical cluster in the SD card; and sequentially reading data with corresponding length from the multiple sections of initial addresses of the memory, and continuously writing the data into the continuous physical cluster of the SD card. The invention can improve the direct memory access speed of the SD card and reduce the resource occupation of CPU (Central Processing Unit).

A memory management system for managing memory of a processing system having a primary memory and at least one secondary memory is disclosed. The memory is managed by optimizing the number of writes required by swapping one or more relevant pages of an application from the primary memory to the at least one secondary memory. The system comprises of a dynamic memory manager for allocating memory to the application from a memory pool and having a first table containing virtual addresses and chunk sizes of memory allocated by the application. The system further comprises of a swap manager having a second table containing the physical addresses of the primary memory pages and information whether the pages are allocated or not. The system further comprises of a memory management unit having a third table containing a mapping information of the physical addresses and the virtual addresses of the one or more physical pages used by the application and information whether the page is dirty or not.

When data is stored in many storage subsystems, metadata, such as a sequence number, is also generated and stored with the data. When the data is accessed, the metadata is checked to ensure that the desired data element has been accessed. In conventional storage subsystems, data elements, such as logical blocks, are stored sequentially in logical pages of each logical volume. Consequently, sequence numbers closely correlate with block positions within the physical pages and sequence number/position patterns tend to repeat frequently and access errors may not be detected. Algorithms are provided to calculate new, offset, physical block positions which reduce the close association of sequence numbers and physical positions, thereby reducing such aliasing. The algorithms incorporate the logical volume number, the logical page number, or both, in addition to the logical block number. As a result, detection of access errors becomes more likely.

Information about an attribute of packets that are receivable corresponding to a command is registered. When a packet is received, information about an attribute of the packet received is acquired. Upon occurrence of a reception error that there is no information in the attribute registering unit corresponding to the information acquired by the attribute acquiring unit, a predetermined reception error handling routine is executed according to a type of the reception error.

The embodiment of the application discloses a data migration method, apparatus and device. The method comprises: according to the capacity of a storage device to be migrated in a storage system, a target migration device is added to the storage system to expand the capacity of the storage system; Performing write prohibition processing on the storage device to be migrated, and migrating data stored in the storage device to be migrated to the target migration device; a memory device to be migrate is removed from that memory system to perform a volume reduction processing on the memory system. With the embodiments of the present application, data migration and equipment replacement can be completed without interrupting service and affecting the quality of service of online services by volumeexpansion processing and volume reduction processing, thus not affecting the reading and writing of data in a storage system by a user, and the speed of data migration can be improved and the time consumed for data migration can be reduced.

Methods, devices and systems enhance compression and decompression of data values when they comprise a plurality of semantically meaningful data fields. According to a first inventive concept of the present invention disclosure, compression is not applied to each data value as a whole, but instead to at least one of the semantically meaningful data fields of each data value, and in isolation from the other ones. A second inventive concept organizes the data fields that share the same semantic meaning together to accelerate compression and decompression as multiple compressors and decompressors can be used in parallel. A third inventive concept is a system where methods and devices are tailored to perform compression and decompression of the semantically meaningful data fields of floating-point numbers after first partitioning further at least one of said data fields into two or a plurality of sub-fields to increase the degree of value locality and improve compressibility of floating-point values.

A data storage device including a flash memory, a temperature sensor, and a controller. The temperature sensor detects surrounding ambient temperature. The controller reads the temperature sensor to obtain a current temperature parameter at a predetermined time, compares a plurality of write temperatures of the blocks with the current temperature parameter one by one, and writes data stored in at least one first block of the blocks into at least one third block of the blocks, wherein the first block corresponds to at least one first write temperature of the write temperatures, and the difference between the first write temperature and the current temperature parameter is greater than a predetermined value.

The invention discloses a storage system for a network communication recording device of a digital substation. The storage system comprises a main controller board module, a hard disk pack module and an IPMI (Intelligent Platform Management Interface) module, wherein the main controller board module is provided with an embedded processor, dual memories and an operation accelerator chip; software system modules are arranged in the dual memories; an operation system module of each software system module is used for running an guiding and loading program for the embedded processor, driving an embedded Linux operation system and introducing a Rootfs file system; a monitoring module is used for monitoring system operation, network link, chip temperature and voltage data of a module and providing the data to the outside through an IPMI specification; a storage control module is used for establishing, removing, restoring, reestablishing and monitoring a disk array of the hard disk pack module, carrying out operation management through a WEB management interface module and realizing NAS (Network Attached Storage) management and IPSAN (Internet Protocol Storage Area Network) management through a data access management module; a data tamper preventing module is used for preventing data from being illegally tampered; and the hard disk pack module is an RAID (Redundant Array of Independent Disk) 0/1/5/6 type disk array; and the IPMI module is used for monitoring the operation condition of the storage system and exporting monitoring data according to the IPMI specification.

An unbalanced plane management method, an associated data storage device and the controller thereof are provided. The unbalanced plane management method may include: setting an unbalanced plane number; selecting at least one plane with a plane count calculated by subtracting the unbalanced plane number from a maximum plane number, and recording at least one set of blocks of the at least one plane to a block skip table; according to block numbers as indexes, combining blocks of unselected planes into super blocks, wherein said super blocks respectively correspond to said block numbers; and recording total capacity of all super blocks and the unbalanced plane number, to generate a latest record of records of multiple types of storage capacity, for further setting storage capacity configuration of the data storage device, wherein said all super blocks include said super blocks.

The invention relates to a method for enabling an MLC (Multi Level Cell) to have a function of an SLC (Single Level Cell). The method comprises the steps of setting a '0' level and a '1' level on each storage unit; writing data into the MLC by simulating a writing method of the SLC. By adopting the technical scheme, the MLC can be enabled to have the writing performance of the SLC and also have the characteristics of high stability and long service life of the SLC.

The invention belongs to the technical field of cloud storage, and particularly relates to a cloud storage data grading method based on user behaviors. The method provided by the invention mainly comprises the following steps of: the cloud platform counts the operation behaviors of the user on the data, wherein the operation behaviors at least comprise uploading, downloading, transferring, collecting and deleting, the statistics at least comprises statistics of the occurrence time and frequency of the operation behaviors, the value of a data file at a certain moment is calculated according tothe statistical data, and in a target time period, the data value is given according to the operation frequency; the current time value of the data is estimated of estimating by adopting an evaluationmethod according to the values of the data on different sequences within a period of time, sequencing the values of all the stored data according to the current time value of the data, and defining the first 10% of the sequencing set as hot data and the first 20%-20% of the sequencing set as hot data; Wherein 10% is defined as general data, the rest is defined as cold data, and the data is movedto a corresponding storage position according to the definition of the data.

The invention discloses a cache data processing method, which comprises the following steps of: performing state monitoring on each node of a storage cluster, and recording node state information; after monitoring that the target node has a fault, writing the cached dirty data of the target node into non-volatile storage equipment; when the target node is recovered, determining a partner node which backs up the cache data with the target node by utilizing the cache pair relation table; judging whether the partner node operates normally or not by using the node state information; and if so, discarding the cached dirty data, and synchronizing the cached data between the target node and the partner node. Therefore, in the double-control/multi-control system, even if the node has a fault and is recovered again, the recovered node can be ensured to keep the system data consistency. The invention further discloses a cache data processing device and equipment and a readable storage medium which have corresponding technical effects.

A system and method for performing sleep state enhancements in a computing device using firmware and NVDIMMs that include DRAM and flash memory is discussed. The flash-backed DRAM covers all of platform memory. All writes to DRAM during system operation are propagated to the flash. Sleep state requests trigger a System Management Interrupt and a firmware a SMI handler handles the sleep state request so as to enable power savings during the sleep state and facilitate faster resume times when exiting the sleep state.

The invention provides a storage access method and device for a virtual machine, and the method comprises the steps: enabling a server to log in a storage service of a network disk distributed for thevirtual machine, obtaining an identifier of the network disk, and creating the virtual disk with the identifier of the network disk for the virtual machine based on the network disk. The virtual machine logs in the storage service of the network disk after starting the operation system based on the virtual disk; and then based on the identifier shared by the network disk and the virtual disk, determining that the storage access path of the virtual machine comprises the access path of the network disk and the access path of the virtual disk, the access path of the virtual disk being a main path, and the access path of the network disk being a standby path. And switching the access path of the network disk as a main path by the virtual machine after detecting that the server logs out of thestorage service of the network disk. Therefore, the virtual disk can be accessed only by occupying a small amount of server resources in the starting stage of the virtual machine, and the virtual machine directly accesses the network disk after the virtual machine is started.

A control device for controlling a memory device to process requests from a plurality of hosts may include a request controller configured to manage a set representing storage space allocated to each of the plurality of the hosts; and a set controller configured to monitor requests from the plurality of hosts and to adjust size of the set, wherein, when the request is a write request from a host among the plurality of hosts, the request controller selects a target physical address among physical addresses included in the set allocated to the host, the target physical address indicating where the request is to be processed.

The embodiment of the invention discloses a data splicing and merging system. The data splicing and merging system comprises a read storage device, a calculator, a processor and a data storage device. The read storage device, the calculator and the data storage device are in electric connection with the processor. The read storage device is used for reading data and transmitting data to the processor. The processor is used for splicing data via the computer and saving data into the data storage device. The spiced data is merged by the processor after being obtained by the read storage device and then stored into the data storage device. The embodiment of the invention discloses a data splicing method of the data splicing and merging system.The embodiment of the invention further discloses the data splicing method of the data splicing and merging system.By adoption of the data splicing and merging system, data share and exchange are more stable and safer and are of promotion.

The invention discloses a method for low-level formatting of a solid-state disk. The method comprises the steps that the number of namespaces in the solid state disk is acquired, and the capacity corresponding to each namespace is obtained through recognition; a physical logic block is allocated for each namespace according to the corresponding capacity, wherein the number of the physical logic blocks is in direct proportion to the capacity; write requests issued by a host are written into the corresponding physical logic blocks; all data on the physical logic blocks is erased according to received low-level formatting commands. According to the method, the namespaces in the solid state disk are obtained, and the physical logic blocks exclusive to the namespace are allocated, so that the independence during data storage is improved, the process and steps of low-level formatting are simplified, and the efficiency of low-level formatting is improved. The invention further discloses a system for low-level formatting of the solid state disk. The system has the above advantages.

A magnetic film is formed over phase pit sequences in a recording medium. Recording marks are established in the magnetic film in accordance with the direction of the magnetization. A laser beam is utilized to read out information from the phase pit sequences. The laser beam is also utilized to read out information based on the recording marks. The minimum mark size of the recording marks is set larger than minimum pit length in the phase pit sequences. The recording medium allows minimization of the influence of the phase pit sequences during the readout of information based on the recording marks as compared with a recording medium having the minimum pit length equal to the minimum mark size. Information can be read out based on the recording marks with a sufficient accuracy even when the minimum pit length gets smaller in the phase pit sequences.

Techniques involve receiving a write request for writing metadata of a file system into a solid state disk having a multi-level cell, and then caching the to-be-written metadata into a memory. The techniques further involve sequentially writing the cached metadata into the solid state disk by redirect-on-write. Accordingly, there is a file system implemented for properties of a solid state disk having a multi-level cell. Such techniques are able to provide completely sequential write of metadata of the file system by supporting redirect-on-write, thereby reducing the write amplification of the solid state disk and improving the performance of the file system.