A data storage system includes a pre-cache and a plurality of storage devices across which a data storage array is distributed. In response to receipt of a write request specifying a logical address and write data, the data storage system buffers the write request among a plurality of write requests in the pre-cache without provisioning in the data storage array a physical extent corresponding to the logical address. A management node analyzes the plurality of write requests buffered in the pre-cache. In response to the analyzing identifying a first pattern of write requests, the management node provisions, in the data storage array, a first physical extent having a smaller grain size and destages the write data to the first physical extent. In response to the analyzing identifying a second pattern of write requests, the management node provisions a second physical extent having a larger grain size and destages the write data from the pre-cache to the second physical extent.

A method of increasing operational life time of SSD RAID and a storage equipment using same, the method including: configuring a data storage device to have a plurality of storage areas, each storage area including a plurality of stripes, and each stripe including an individual block of a plurality of solid state disks, where at least one block in each stripe is a check bit block, the other blocks are data blocks; and configuring two neighboring stripes in each storage area to form a composite stripe according to a plurality of index combinations in a mapping table, where the composite stripe includes two neighboring blocks in each solid state disk, and the composite stripe is divided into a stripe writing area and an empty stripe area, so that each solid state disk in each storage area has a reserved space.

A method of increasing operational life time of SSD RAID and a storage equipment using same, the method including: configuring a data storage device to have a plurality of storage areas, each storage area including a plurality of stripes, and each stripe including an individual block of a plurality of solid state disks, where at least one block in each stripe is a check bit block, the other blocks are data blocks; and configuring two neighboring stripes in each storage area to form a composite stripe according to a plurality of index combinations in a mapping table, where the composite stripe includes two neighboring blocks in each solid state disk, and the composite stripe is divided into a stripe writing area and an empty stripe area, so that each solid state disk in each storage area has a reserved space.

A storage controller, when writing n sets of data into a first storage device, adds dummy data to other sets of data except for a first set of data having a largest size among the n sets of data such that sizes of other sets of data become equal to the size of the first set of data, calculates (n1) parities based on the first set of data and the other sets of data, and when reading the n sets of data from the first storage device, concurrently performs a processing of reading a second set of data having a smallest size among the n sets of data from the first storage device and a processing of restoring each of two or more sets of data in the n sets of data except for the second set of data, by using the (n1) parities and the dummy data.

A storage device may include a storage medium configured to store data of an external device; and a storage controller configured to control an operation of the storage medium. The storage controller is configured to receive a storage request for the data and an external trust level of the data from the external device, determine an internal trust level of the data as one of a plurality of internal trust levels based on the external trust level in consideration of a status of the storage medium, group the data into unit data having an arbitrary size corresponding to the determined internal trust level, generate parity information corresponding to the determined internal trust level based on the grouped data, and control an operation of storing the grouped data and the parity information in the storage medium.

A storage device may include a storage medium configured to store data of an external device; and a storage controller configured to control an operation of the storage medium. The storage controller is configured to receive a storage request for the data and an external trust level of the data from the external device, determine an internal trust level of the data as one of a plurality of internal trust levels based on the external trust level in consideration of a status of the storage medium, group the data into unit data having an arbitrary size corresponding to the determined internal trust level, generate parity information corresponding to the determined internal trust level based on the grouped data, and control an operation of storing the grouped data and the parity information in the storage medium.

A storage device may include a storage medium configured to store data of an external device; and a storage controller configured to control an operation of the storage medium. The storage controller is configured to receive a storage request for the data and an external trust level of the data from the external device, determine an internal trust level of the data as one of a plurality of internal trust levels based on the external trust level in consideration of a status of the storage medium, group the data into unit data having an arbitrary size corresponding to the determined internal trust level, generate parity information corresponding to the determined internal trust level based on the grouped data, and control an operation of storing the grouped data and the parity information in the storage medium.