A method may include transferring data between a host and a first storage device through a first storage interface, transferring data between the host and a second storage device through a second storage interface, and transferring data between the first storage device and the second storage device through a peer-to-peer channel. A storage system may include a host interface, a first storage device having a first storage interface coupled to the host interface, a second storage device having a second storage interface coupled to the host interface, and a peer-to-peer bus coupled between the first and second storage devices. A storage device may include a storage medium, a storage device controller coupled to the storage medium, a storage interface coupled to the storage device controller, and a peer-to-peer interface coupled to the storage device controller.

A total estimated occupancy value of a first data on a first data block of a plurality of data blocks is determined. To determine the total estimated occupancy value of the first data block, a total block power-on-time (POT) value of the first data block is determined. Then, a scaling factor is applied to the total block POT value to determine the total estimated occupancy value of the first data block. Whether the total estimated occupancy value of the first data block satisfies a threshold criterion is determined. Responsive to determining that the total estimated occupancy value of the first data block satisfies the threshold criterion, data stored at the first data block is relocated to a second data block of the plurality of data blocks.

A phase change memory system comprises a phase change memory device which includes a plurality of memory units including a plurality of memory cells in units of at least one or more codewords and a phase change memory controller which performs a chip refresh operation for refreshing the entire phase change memory device, wherein the phase change memory device includes a setting circuitry which determines one of the plurality of memory units in a desired manner, a refresh controller which refreshes the decided memory unit, a sensing circuitry which senses data of at least one or more codewords included in the refreshed memory unit, and a request circuitry which requests a host for the chip refresh operation on the basis of a result of the sensing operation.

A first data storage rack has a first computing unit coupled to a first plurality of storage drives via a first storage controller. A second data storage rack has a second computing unit coupled to a second plurality of storage drives via a second storage controller. A first rack-to-rack storage link cable couples the first computing unit to the second storage controller such that the first computing unit can provide access to the second plurality of drives in response to a failure that prevents the second computing unit from providing access to the second plurality of drives via a system network.

In response to detecting the failure of a data storage drive, a drive rebuild operation is performed. The drive rebuild operation is performed by periodically i) calculating a target rebuild rate that enables data previously stored on the failed data storage drive to be completely rebuilt on at least one other data storage drive within an expected drive rebuild time window, ii) calculating a new value for at least one drive rebuild parameter based on a value for the drive rebuild parameter corresponding to the target rebuild rate indicated by a static rebuild rate data structure and a current level of host I/O (Input/Output) activity, and iii) rebuilding the data previously stored on the failed data storage drive on the at least one other data storage drive for a predetermined time period with the at least one drive rebuild parameter set to the new value for the drive rebuild parameter.

An electronic control unit includes a volatile memory, a nonvolatile memory that includes a storage area including a data portion to which data loaded into the volatile memory is written and a margin portion which is an unused portion corresponding to the data, and a control unit configured to load the data of the nonvolatile memory into the volatile memory. The nonvolatile memory stores valid portion information which is information indicating the data portion. The control unit is configured to load the data of the nonvolatile memory into a storage area of the volatile memory based on the valid portion information.

A master profile may be created defining a plurality of values for a plurality of storage system parameters. The master profile may be stored and applied to a plurality of storage systems. In some embodiments, one or more values defined in the master profile may be changed and the resulting plurality of parameter values stored in a new master profile. Current values of storage system parameters may be monitored, for example, determined according to a predefined schedule or in response to user input, and the current values may be compared against the values defined in the master profiles. The results of these comparisons may be recorded as part of compliance information that indicates the extent of compliance of the parameter values of a storage system with the master profile parameter values. The compliance information may be included as part of a compliance report, notification or some other communication.

When a communication protocol is changed, the I/O function can be appropriately provided. In a computer system, a storage node includes a CPU and a storage control program that performs communication relating to data I/O. The storage control program has a first storage control program that is capable of using a first communication protocol, and a second storage control program that is capable of using the first communication protocol and a second communication protocol. The control node the control node causes, when any storage node of the plurality of storage nodes is capable of executing the first storage control program alone, all storage nodes to perform communication using the first communication protocol. The control node causes, after all storage nodes of the plurality of storage nodes are enabled to execute the second storage control program, the all storage nodes to perform communication using the second communication protocol.

An information processing device includes a processor configured to anonymize classification information associated with data and used to classify the data in a case where the data is transferred to another storage location.

A system and method for effectively scheduling read and write operations among a plurality of solid-state storage devices. A computer system comprises client computers and data storage arrays coupled to one another via a network. A data storage array utilizes solid-state drives and Flash memory cells for data storage. A storage controller within a data storage array comprises an I/O scheduler. The storage controller is configured to receive a read request targeted to the data storage medium, and identify at least a first storage device of the plurality of storage devices which contains data targeted by the read request. In response to either detecting or predicting the first storage device will exhibit variable performance, the controller is configured to generate a reconstruct read request configured to obtain the data from one or more devices of the plurality of storage devices other than the first storage device.