Abstract: A determination unit determines the type of a command received via a communication interface. A counting unit counts, among commands received via the communication interface, the number of commands currently being executed. A control unit performs, when the number of commands currently being executed is less than or equal to a limit value corresponding to the type of a command received via the communication interface, data access to a memory device according to the received command. In addition, the control unit prevents the data access according to the received command when the number of commands currently being executed exceeds the limit value corresponding to the type of the received command.

Abstract: Provided are a processor generates second notification information by copying first notification information including target information about all communication adaptors in a storage apparatus; updates the first notification information, upon configuration information on the communication adaptors being modified; updates, when receiving a target information obtainment request, the second notification information with second notification information; blocks, when a predetermined copy prevention condition is met, copy of the first notification information to the second notification information; and sends, when receiving the target information obtainment request, the second notification information to the host apparatus, thereby, the load for notifying notification information to the host apparatus can be reduced, as well as preventing any inconsistency in notifying the notification information.

Abstract: Provided are a processor generates second notification information by copying first notification information including target information about all communication adaptors in a storage apparatus; updates the first notification information, upon configuration information on the communication adaptors being modified; updates, when receiving a target information obtainment request, the second notification information with second notification information; blocks, when a predetermined copy prevention condition is met, copy of the first notification information to the second notification information; and sends, when receiving the target information obtainment request, the second notification information to the host apparatus, thereby, the load for notifying notification information to the host apparatus can be reduced, as well as preventing any inconsistency in notifying the notification information.

Abstract: Provided are a processor generates a plurality of pieces of divided notification information, based on notification information including target information about a plurality of communication adaptors in a storage apparatus; a processor stores the plurality of pieces of divided notification information; and sends the divided notification information stored in the memory, in response to a target information obtainment request from a host apparatus, thereby, the load for notifying notification information to the host apparatus can be reduced, as well as preventing any inconsistency in notifying the notification information.