An illustrative method includes detecting, by a cloud based storage system services provider based on a problem signature, that a storage system has experienced a problem that is associated with the problem signature; and deploying, without user intervention, one or more corrective measures that modify the storage system to resolve the problem.

Converting RAID data between persistent storage types, including: for each portion of a RAID shard of a RAID stripe: writing, to a respective plurality of source solid state drives, the portion of the RAID shard; detecting that all portions of the RAID shard have been successfully written; copying, from one of the plurality of source solid state drives to a respective target solid state drive among a plurality of target solid state drives from one of the plurality of source solid state drives, the RAID shard, where the RAID shard is copied from a source solid state drive that is different from where each other RAID shard of the RAID stripe is copied from.

A method for execution in a storage network, the method begins by determining a user device group content preference, wherein the user group content includes target content for a user device group and the determining includes predicting future target content for the user group. The method continues by selecting a plurality of network edge units for staging encoded data slices, identifying target content for partial download to the plurality of network edge units and dispersed error encoding the target content to generate a set of encoded data slices. The method then continues by identifying encoded data slices from the set of encoded data slices corresponding to the target content for partial download and determining a partial downloading schedule for sending the encoded data slices for partial download to each network edge unit of the plurality of network edge units. The method continues by facilitating partial downloading of the target content by sending the encoded data slices for partial download to each network edge unit of the plurality of network edge units.

A network device includes: a set of content memory banks including a first memory bank; a parity memory bank; a first memory interface; and a second memory interface. The first memory interface is configured to perform a write operation to write new content data to a location in a first content memory bank in a plurality of partial write operations that are spread over two or more clock cycles, including: generating new parity information for the new content data using old content data at the location in the first content memory bank, and storing the new parity information to the parity memory bank. The second memory interface is configured to perform a read operation at the location in the first content memory bank concurrently while the first memory interface is performing at least one of the plurality of partial write operations.

A memory device system includes: a first memory that has m lines of addresses and in which different pieces of data are respectively stored at the m lines of addresses, and a parity bit; a second memory that has m lines of addresses and in which same pieces of data as the pieces of data stored in the first memory are stored in an initial state; a first register that is connected with the first memory; a second register that is connected with the second memory; a comparator; a transfer register that stores the piece of data of the first memory; an error data register that stores the piece of data of the second register; an error address register that stores an address of the second memory; a parity calculation portion that calculates parity of all pieces of data; and a controller that performs a predetermined control.

A storage system manages correspondence relationships between physical addresses and logical addresses inside a storage device, as well as logical spaces provided by a plurality of storage devices, and when a determination is made as to whether first data and second data are stored in the same storage device in a case in which the first data and the second data are exchanged inside a logical space, and the determination is found to be affirmative, the storage device replaces the logical address corresponding to the first data with the logical address corresponding to the second data without changing the physical address of the physical area in which the first data is stored and the physical address of the physical area in which the second data is stored.

A bit interleaver, a bit-interleaved coded modulation (BICM) device and a bit interleaving method are disclosed herein. The bit interleaver includes a first memory, a processor, and a second memory. The first memory stores a low-density parity check (LDPC) codeword having a length of 64800 and a code rate of 3/15. The processor generates an interleaved codeword by interleaving the LDPC codeword on a bit group basis. The size of the bit group corresponds to a parallel factor of the LDPC codeword. The second memory provides the interleaved codeword to a modulator for 64-symbol mapping.

A method of correcting errors in a memory array. The method includes configuring a first memory array with a first error correction code (ECC) to provide error correction of data stored in the first memory array, configuring a second memory array with a second ECC to provide error correction of the data stored in the first memory array, performing a reflow process on the first and second memory array, and correcting data stored in the first memory array based on at least the first ECC or the second ECC. The first memory array includes a first set of memory cells arranged in rows and columns. The second memory array includes a second set of memory cells arranged in rows and columns.

Systems and methods for logically organizing data for storage and recovery on a data storage medium using a multi-level format are described. Embodiments include systems and methods for protecting data stored on a data storage medium so that the data may be recovered without errors.

A first node group including at least three nodes is predefined in a distributed storage system. Each node of the first node group is configured to send data blocks stored in storage devices managed by the node to other nodes belonging to the first node group. A first node is configured to receive data blocks from two or more other nodes in the first node group. The first node is configured to create a redundant code using a combination of data blocks received from the two or more other nodes and store the created redundant code to a storage device different from storage devices holding the data blocks used to create the redundant code. Combinations of data blocks used to create at least two redundant codes in redundant codes created by the first node are different in combination of logical addresses of constituent data blocks.