摘要:
A disk array device includes hard disks from which RAID groups are configured. Therein, a volume setting unit sets one or more used areas. A data check control unit determines, on the basis of the state into which the used areas have been set, which areas in the RAID groups are subject to a diagnosis. A data check execution unit that executes a cyclical diagnosis on the areas determined, by the data check control unit, to be those subject to a diagnosis.
摘要:
A storage subsystem receives writes from a computer via a standard storage subsystem interface. The storage subsystem reduces a number of the writes. A single drive of the storage subsystem has primary and redundant storage devices with storage device interfaces. A disk controller of the single drive implements a data redundancy scheme by storing data associated with the reduced number of writes in the primary storage devices and by storing computed redundancy information in the redundant storage devices. The disk controller is operable without a loss of data in the presence of at least a single failure of any of the storage devices. Optionally the storage devices are flash memory devices. Optionally the disk controller is operable without a loss of data in the presence of at least two failures of any of the storage devices when a number of the redundant storage devices is at least two.
摘要:
The present disclosure relates to techniques for providing data redundancy after reducing memory writes. In one example implementation according to aspects of the present disclosure, a storage system receives a storage command for providing data redundancy in accordance with a first data redundancy scheme. The storage system then implements a subsequent data redundancy in accordance with a second data redundancy scheme.
摘要:
The present disclosure relates to techniques for providing data redundancy after reducing memory writes. In one example implementation according to aspects of the present disclosure, a storage controller receives a storage command for providing data redundancy in accordance with a first data redundancy scheme. The storage controller then translates the storage command for providing the data redundancy in accordance with a second data redundancy scheme.
摘要:
A disk array device includes hard disks from which RAID groups are configured. Therein, a volume setting unit sets one or more used areas. A data check control unit determines, on the basis of the state into which the used areas have been set, which areas in the RAID groups are subject to a diagnosis. A data check execution unit that executes a cyclical diagnosis on the areas determined, by the data check control unit, to be those subject to a diagnosis.
摘要:
The present disclosure relates to techniques for providing data redundancy after reducing memory writes. In one example implementation according to aspects of the present disclosure, a storage controller receives a storage command for providing data redundancy in accordance with a first data redundancy scheme. The storage controller then translates the storage command for providing the data redundancy in accordance with a second data redundancy scheme.
摘要:
A storage subsystem receives writes via a storage subsystem interface and reduces a number of the writes. Data associated with the reduced number of writes is stored in storage devices of a single drive. Computed redundancy information is stored in the storage devices. A data redundancy scheme is implemented via a disk controller that is enabled to operate without a loss of data in the presence of at least a single failure of any of the storage devices.
摘要:
According to one embodiment, a controller controls writing into and reading from a storage apparatus that includes a first data-storage unit and a second data-storage unit. The second data-storage unit stores user data and parity data of the user data. The first data-storage unit stores the parity data. The controller includes a parity updating unit and a parity writing unit. When parity data is updated, the parity updating unit writes the updated parity data into the first data-storage unit. When a certain requirement is satisfied, the parity writing unit reads the parity data written in the first data-storage unit, and writes the parity data thus read into the second data-storage unit.
摘要:
A system, method, and computer program product are provided for providing data redundancy in a plurality of storage devices. In operation, a number of writes to a plurality of storage devices is reduced. Additionally, after the reducing, data redundancy is provided utilizing a data redundancy scheme.
摘要:
The present disclosure relates to techniques for providing data redundancy after reducing memory writes. In one example implementation according to aspects of the present disclosure, a storage system receives a storage command for providing data redundancy in accordance with a first data redundancy scheme. The storage system then implements a subsequent data redundancy in accordance with a second data redundancy scheme.