Abstract: A storage device includes a non-volatile storage, and a controller configured to carry out, in parallel, operations in response to a plurality of commands received from a host and queued in a command queue. When the controller detects an error in a first operation that is being carried out in response to a first command while the controller is in parallel carrying out a second operation in response to a second command, the controller continues to carry out the second operation until a predetermined condition is met while carrying out the second operation and, at that time when the predetermined condition is met, transmits an error event notification to the host.

Abstract: A storage device includes a non-volatile storage, and a controller configured to carry out, in parallel, operations in response to a plurality of commands received from a host and queued in a command queue. When the controller detects an error in a first operation that is being carried out in response to a first command while the controller is in parallel carrying out a second operation in response to a second command, the controller continues to carry out the second operation until a predetermined condition is met while carrying out the second operation and, at that time when the predetermined condition is met, transmits an error event notification to the host.

Abstract: A memory system includes a non-volatile memory including a plurality of memory blocks, a memory block being a unit of data erasing, and a memory controller configured to control data writing into the non-volatile memory, data erasing from the non-volatile memory, and garbage collection of the non-volatile memory. When the garbage collection is carried out with respect to a target memory block, the memory controller selects a memory block to which valid data stored in the target memory block are to be transferred based on a value indicating access frequency to a logical address range mapped to the valid data.

Abstract: Novel and improved paperboards useful for making gypsum wallboards, which are sized with a specific organopolysiloxane comprising mercaptoalkyl containing organosiloxane units and, optionally, methacryloxy-containing organosiloxane units in its molecular structure. The sizing compound is used in a relatively small amount and yet can exhibit an excellent effect within a very short time. The sized paperboards have adequately controllable moisture absorption as well as air permeability. They are used to cover or sandwitch a gypsum core to form a complete wallboard in a convenient and economical manner.