126results about How to "Improve storage reliability" patented technology

A system and method for replacing file system processors, also known as hot swapping, is described. The system and method operate on a fault-tolerant network file system that includes a first file server that is operably connected to a network fabric and a second file server that is operably connected to the network fabric. The fault-tolerant network file system includes a first disk array that is operably coupled to the first file server and to the second file server and a second disk array that is operably coupled to the first file server and to the second file server. First file system information is loaded on the first file server. The first file system information includes a first intent log of proposed changes to first metadata. Second file system information is loaded on the second file server. The second file system information includes a second intent log of proposed changes to second metadata. The first file server has a copy of the second metadata, and the second file server maintains a copy of the first metadata, thereby allowing the first file server to access files on the second disk array in the event of a failure of the second file server.

A file system that balances the loading of filers and the capacity of drives that are associated with the filers is described. The file system includes a first disk drive that includes a first unused capacity and a second disk drive that includes a second unused capacity, wherein the second unused capacity is smaller than the first unused capacity. The file system further includes a first filer that is configured to fill requests from clients through access to at least the first disk drive. The file system further includes a second filer that is configured to fill requests from clients through access to at least the second disk drive. The second filer is configured to select an infrequently accessed file from the second disk drive and to push the infrequently accessed files to the first disk drive, thereby improving a balance of unused capacity between the first and second disk drives without substantially affecting a loading for each of the first and second filers.

A file system that balances the loading of filers and the capacity of drives that are associated with the filers is described. The file system includes a first disk drive that includes a first unused capacity and a second disk drive that includes a second unused capacity, wherein the second unused capacity is smaller than the first unused capacity. The file system further includes a first filer that is configured to fill requests from clients through access to at least the first disk drive. The file system further includes a second filer that is configured to fill requests from clients through access to at least the second disk drive. The second filer is configured to select an infrequently accessed file from the second disk drive and to push the infrequently accessed files to the first disk drive, thereby improving a balance of unused capacity between the first and second disk drives without substantially affecting a loading for each of the first and second filers.

The invention discloses an electronic certificate management method and related equipment. The method comprises the steps as follows: the electronic equipment processes an electronic certificate in response to a received processing command; an encrypted processing record is broadcasted into a block chain network, thus allowing a node of the block chain network to store the encrypted processing record into a block chain of the block chain network. According to the scheme of the method provided by the invention, distributed management of the electronic certificate is achieved, storage reliability of the electronic certificate is improved, the risk of tampering or leaking certificate information is reduced, and information security and credibility of the electronic certificate are effectively ensured.

The present invention controls supply of power to a storage device on the basis of an access status, moves a logical storage device between physical storage devices having different power supply modes, reduces energization time, and improves the reliability. A relocation plan creation portion creates a relocation plan by disposing a logical volume with high access frequency in a RAID group which is in a long-time energization mode, disposing a logical volume with moderate access frequency in a RAID group which is in a first short-time energization mode, and disposing a logical volume with low access frequency in a RAID group which is in a second short-time energization mode. An execution time determination portion determines an execution time for executing the relocation plan, on the basis of the access frequency to the RAID groups. The volumes with higher access frequency are disposed in the RAID group in which the power supply time is long, and the volumes with lower access frequency are disposed in the RAID group in which the power is supplied in an on-demand fashion.

A system and method for replacing file system processors, also known as hot swapping, is described. The system and method operate on a fault-tolerant network file system that includes a first file server that is operably connected to a network fabric and a second file server that is operably connected to the network fabric. The fault-tolerant network file system includes a first disk array that is operably coupled to the first file server and to the second file server and a second disk array that is operably coupled to the first file server and to the second file server. First file system information is loaded on the first file server. The first file system information includes a first intent log of proposed changes to first metadata. Second file system information is loaded on the second file server. The second file system information includes a second intent log of proposed changes to second metadata. The first file server has a copy of the second metadata, and the second file server maintains a copy of the first metadata, thereby allowing the first file server to access files on the second disk array in the event of a failure of the second file server.

A magnetic disk apparatus comprises a failure prediction condition detection unit and a failure prediction time operation logic unit. The failure prediction condition detection unit notifies the failure prediction time operation logic unit when detecting an establishment of a failure prediction condition. Having received the notification, the failure prediction time operation logic unit instructs to execute a failure prediction-time operation which is predetermined corresponding to a failure prediction condition. The failure prediction-time operation includes an operation for trying to return to a normal state and / or protecting data.

The present application discloses a file storage method, an electronic device and a storage medium thereof. The method comprises the following steps: a block chain accounting node receives the first file data; calculating the first file data by using a hash algorithm to obtain a first hash value; generating a second hash value using the first hash value and the second file data; the second hash value or both the first hash value and the second hash value are stored in a block chain for verifying whether the first file data has been tampered with. The scheme can avoid malicious tampering with the file data and ensure the reliability of the file data.

The invention discloses a transaction storage method, a storage network and electronic equipment, and the method comprises the steps that a transaction node sends transaction data of a transaction toan information service processing node after the transaction initiated by the transaction node is completed; the information service processing node extracts characteristic data of the transaction byutilizing the transaction data; the transaction node calculates the characteristic data by using an irreversible encryption algorithm to obtain a first information abstract of the transaction, packages the first information abstract of the transaction into a storage request and sends the storage request; and the blockchain accounting node receives the storage request and stores the first information abstract in the blockchain. Through the scheme, the transaction can be prevented from being maliciously tampered, and the reliability of the transaction is ensured.

An optical recording medium includes a substrate, a light transmission layer and a plurality of recording layers between the substrate and the light transmission layer and capable of recording data in the plurality of recording layers and reproducing data recorded in the plurality of recording layers by projecting a laser beam via the light transmission layer onto the plurality of recording layers, at least one recording layer other than a farthest recording layer from the light transmission layer including a reflective film containing Ag as a primary component and C as an additive. In the thus constituted optical recording medium, recording characteristics and reproducing characteristic of the respective recording layers can be improved.

A highly-reliable system, a management apparatus and method that can enhance the reliability of a storage system is provided.The present invention provides a storage system having a higher level system with a predetermined application installed, a storage apparatus providing a storage area the application uses, and a host server that transmits data between the higher level system and the storage apparatus, and a management apparatus and method for managing the storage system, wherein a current performance value for each of one or more performance information collection targets existing on a data path between the host server and the storage apparatus is collected; whether or not a performance problem has occurred is judged, based on a target performance value set in advance for the application and a current performance value for the application; and a threshold value for the performance value of each performance problem collection target is set, based on the current performance value of each performance information collection target and the result of the judgment of whether or not a performance problem has occurred.

A storage system, a controlling method thereof, and a virtual device that can secure enhanced reliability. A virtualizing apparatus for virtualizing storage areas provided by a storage apparatus to a host system consolidates the management of a data input / output limitation that is set for each storage area or for each piece of data and when data stored in one storage area is migrated to an other storage area, the virtualizing apparatus sets the input / output limitation setting of the storage area or data, to which the data is migrated, to that of the storage area or data from which the data is migrated.

To maintain reliability even when the repetition of the power saving control for storage systems occurs frequently due to the access from the host computer. During the course of controlling the operation mode of the drives, the controller measures the start / stop cycle count and the load / unload cycle count, calculates the S / S wear-out rate showing the ratio of the measured value of the start / stop cycle count to the first upper limit value and the L / U wear-out rate showing the ratio of the measured value of the load / unload cycle count to the second upper limit value, and for the drives in the idle operation mode, selects the low-speed rotation operation mode if the S / S wear-out rate is greater than the L / U wear-out rate, or selects the standby operation mode if the S / S wear-out rate is less than the L / U wear-out rate.

The invention discloses an intelligent building integration system and control method based on the Internet of Things and cloud computing. The basic unit of environmental control, the computing node platforms distributed in each area are connected into a three-dimensional mesh network topology that can reflect the connected structure of the building space; the computing node network of the three-dimensional mesh structure of the present invention realizes the whole building (building Group) intelligent system distributed integration.

Systems and methods are provided for storing and retrieving boot data (e.g., a first stage bootloader) in and from a non-volatile memory (“NVM”), such as a NAND flash memory. To increase storage reliability, the boot data may be stored in a subset of the pages in a boot data storage area, such as in only lower pages. The subset may be selected based on the specific operating specifications and characteristics of the NVM. To prevent a boot ROM from having to maintain a NVM-specific map of which pages are used to store boot data, the map may be maintained in the NVM itself. For example, the map may be in the form of a linked list, where each page storing boot data can include a pointer that points to the next page that stores boot data.

The present application discloses a method for verifying contract data and a network and electronic equipment thereof. The method comprises the following steps: the verification node obtains a first digital fingerprint of the target contract data stored in the block chain; Acquiring the target contract data stored by the contract storage node, and calculating a second digital fingerprint using thetarget contract data; Judging whether the first digital fingerprint and the second digital fingerprint are consistent, and if so, determining that the target contract data in the contract storage node has not been tampered with. The scheme can avoid the contract being tampered with maliciously and guarantee the reliability of the contract data.

A highly-reliable system, a management apparatus and method that can enhance the reliability of a storage system is provided.The present invention provides a storage system having a higher level system with a predetermined application installed, a storage apparatus providing a storage area the application uses, and a host server that transmits data between the higher level system and the storage apparatus, and a management apparatus and method for managing the storage system, wherein a current performance value for each of one or more performance information collection targets existing on a data path between the host server and the storage apparatus is collected; whether or not a performance problem has occurred is judged, based on a target performance value set in advance for the application and a current performance value for the application; and a threshold value for the performance value of each performance problem collection target is set, based on the current performance value of each performance information collection target and the result of the judgment of whether or not a performance problem has occurred.

A driving method of a semiconductor device is provided. In a semiconductor device including a bit line, a selection line, a selection transistor, m (m is a natural number greater than or equal to 2) writing word lines, m reading word lines, a source line, and first to m-th memory cells, each memory cell includes a first transistor and a second transistor that holds charge accumulated in a capacitor. The second transistor includes a channel formed in an oxide semiconductor layer. In a driving method of a semiconductor device having the above structure, when writing to a memory cell is performed, the first transistor is turned on so that a first source terminal or a first drain terminal is set to a fixed potential; thus, a potential is stably written to the capacitor.

The present invention provides a storage system capable of preventing data loss when power failure or other failures occur to an external power supply, by determining whether the capacity corresponding to the write data can be saved from a volatile memory to a nonvolatile memory based on a charged capacity of a battery used as an internal power supply and a non-backed-up (not yet backed-up) data capacity from the volatile memory to the nonvolatile memory, when storing data from a host computer or a system drive to the volatile memory of the storage system. If it is determined that saving of data is possible, an area corresponding to the write data capacity is allocated in the volatile memory and data is written to the allocated area, but if it is determined that saving of data is not possible, the writing of data is suppressed.

The invention discloses an increment erasure code storage method and an increment erasure code storage system under multiple network disks. The increment erasure code storage method under multiple network disks comprises the following steps: firstly dividing a file into multiple 'file blocks'; converting the 'file blocks' into multiple 'erasure data blocks' by an erasure code algorithm; and finally separately storing all 'erasure data blocks' into the multiple network disks and providing 'file block-level' reduced redundancy storage. The increment erasure code storage system under the multiple network disks comprises a 'network disk' device, a 'file system meta server' device and a 'file system client' device, wherein the 'network disk' device takes charge of storing data content of the file; the 'file system meta server' device takes charge of storage of metadata of a file system and reduced redundancy management of the 'file blocks'; the 'file system client' device takes charge of decomposition and synthesis of the 'file blocks', encoding and decoding of the 'erasure data blocks', network disk uploading and downloading of the 'erasure data blocks', redundancy removal and outward providing of file access service. According to the increment erasure code storage method and the increment erasure code storage system under the multiple network disks, the reliability, the access efficiency and the space utilization rate of a multi-network disk-based storage system can be effectively improved.

A storage system is arranged to speed up the operation and easily duplicate data without the capacity of the cache memory being so large even if lots of host computers are connected with the storage system. This storage system includes channel adapters, disk drives, disk adapters, and network switches. Further, the front side cache memories connected with the channel adapters and the back side cache memories connected with the disk adapters are provided as two layered cache system. When a request for writing data is given to the storage system by the host computer, the data is written in both the front side cache memory and the back side cache memory. The write data is duplicated by placing the write data in one of the front side cache memories and one of the back side cache memories or two of the back side cache memories.

Error tolerance is increased for a storage system having a plurality of arrays by making local redundancy in a selected array globally available throughout the storage system. To achieve the increased error tolerance, a donor array is selected from the plurality of arrays when the difference between a minimum distance of the donor array and a minimum distance of a recipient array is greater or equal to 2. A donor storage unit is selected in the donor array and recipient information is then rebuilt from the recipient array on the selected storage unit. The selected storage unit is indicated to the donor array as having been donated before the lost information is rebuilt on the selected storage unit. Preferably, the minimum Hamming distance of the recipient array is d≧2 before the donor array is selected from the plurality of arrays.

The present application discloses a storage method for a power purchase and sale contract, a network and an electronic device thereof. The method comprises the following steps: a contract management node sends a first storage request after a purchase and sale power contract is signed, wherein the first storage request is used for requesting to store a digital fingerprint of the purchase and sale power contract data, and the digital fingerprint of the purchase and sale power contract data is generated based on the content of the purchase and sale power contract data; the block chain accountingnode receives the first storage request and stores a digital fingerprint of the purchase and sale contract data in the block chain. The scheme can avoid malicious tampering with the power purchase andsale contract and guarantee the reliability of the power purchase and sale contract.