摘要:
A flash storage device comprises a plurality of data blocks, each data block comprising a plurality of data segments, a system memory, and a controller. The controller is configured to cache in the system memory a plurality of data sectors to be written, to write to a first one of the plurality of data segments a first one of the plurality of data sectors, to write to the first one of the plurality of data segments a first portion of a second one of the plurality of data sectors, and to write to a second one of the plurality of data segments a second portion of the second one of the plurality of data sectors.
摘要:
A data storage method, comprising, receiving host data to be written to a plurality of flash storage devices, allocating the host data to one or more data units of a plurality of data units, allocating pad data to one or more data units of the plurality of data units that have not been filled with host data and generating redundant data in a redundant data unit based on the plurality of data units. In certain aspects, the method further comprises steps for writing the plurality of data units and the redundant data unit to a stripe across the plurality of flash storage devices, wherein each of the plurality of data units and the redundant data unit is written in the respective flash storage devices at a common physical address.
摘要:
A data storage method, comprising, receiving host data to be written to a plurality of flash storage devices, allocating the host data to one or more data units of a plurality of data units, allocating pad data to one or more data units of the plurality of data units that have not been filled with host data and generating redundant data in a redundant data unit based on the plurality of data units. The method further comprises steps for writing the plurality of data units and the redundant data unit to a stripe across the plurality of flash storage devices, wherein each of the plurality of data units and the redundant data unit is written in the respective flash storage devices at a common physical address.
摘要:
A flash storage device comprises a plurality of data blocks, each data block comprising a plurality of data segments, a system memory, and a controller. The controller is configured to cache in the system memory a plurality of data sectors to be written, to write to a first one of the plurality of data segments a first one of the plurality of data sectors, to write to the first one of the plurality of data segments a first portion of a second one of the plurality of data sectors, and to write to a second one of the plurality of data segments a second portion of the second one of the plurality of data sectors.
摘要:
Methods and systems for the prioritized erasure of data blocks in a flash storage device are provided. A data block in the flash storage device is selected for erasure based upon the number of valid data segments therein, thereby minimizing the number of data segments that are carried over to another data block before erasing the selected data block. The overhead of write operations in the flash storage device is therefore greatly reduced, and the overall performance thereof greatly increased. A method for managing memory operations in a flash storage device having a plurality of data blocks comprises the steps of selecting one of the plurality of data blocks for erasure based upon a number of valid data segments therein, and erasing the selected one of the plurality of data blocks.
摘要:
A method of transferring data in a flash storage device comprising a random access memory and a plurality of channels of a flash array is provided. The method comprises receiving a plurality of data segments from a host system, storing the plurality of data segments in the random access memory, allocating the plurality of data segments among the plurality of channels of the flash array, and writing the allocated data segments from the random access memory to the respective channels of the flash array.