Abstract: According to an aspect of an embodiment, a server system includes a service processor, a plurality of system boards and a plurality of crossbar boards connecting the system boards. The service processor includes a first notifier that notifies each of the crossbar boards of a crossbar board subjected to maintenance. The crossbar boards each include a first transmitter that, when notified by the service processor that the crossbar board subjected to maintenance is another crossbar board, generates a suspension packet for suspending packet transmission to the another crossbar board and transmits the suspension packet to each of the system boards. The system boards each include a suspender that, when receiving the suspension packet from the crossbar board, suspends packet transmission to the crossbar board subjected to maintenance.

Abstract: A controlling apparatus for controlling an information processing apparatus, the controlling apparatus includes a first controller including a first data transfer unit that communicates data between the information processing apparatus, and a first processing unit that generates a command to instruct the first data transfer unit to communicate data between the information processing apparatus, and a second controller including a second data transfer unit that communicates data between the information processing apparatus, and a second processing unit that generates a command to instruct the second data transfer unit to communicate data between the information processing apparatus.

Abstract: According to an aspect of an embodiment, a server system includes a service processor, a plurality of system boards and a plurality of crossbar boards connecting the system boards. The service processor includes a first notifier that notifies each of the crossbar boards of a crossbar board subjected to maintenance. The crossbar boards each include a first transmitter that, when notified by the service processor that the crossbar board subjected to maintenance is another crossbar board, generates a suspension packet for suspending packet transmission to the another crossbar board and transmits the suspension packet to each of the system boards. The system boards each include a suspender that, when receiving the suspension packet from the crossbar board, suspends packet transmission to the crossbar board subjected to maintenance.

Abstract: A controlling apparatus for controlling an information processing apparatus, the controlling apparatus includes a first controller including a first data transfer unit that communicates data between the information processing apparatus, and a first processing unit that generates a command to instruct the first data transfer unit to communicate data between the information processing apparatus, and a second controller including a second data transfer unit that communicates data between the information processing apparatus, and a second processing unit that generates a command to instruct the second data transfer unit to communicate data between the information processing apparatus.

Abstract: A POST management apparatus for managing a POST of an SB in a partition which operates in units of an OS using the CPU of the SB as a resource accesses the storage area storing the POST of the SB so as to perform read/write operation and to acquire/recognize the individual information on the SB and the version number information of the POST, transmits the POST of a predetermined version number according to at least one of the individual information and the version number information, and manages the version number of the POST so that the version numbers of the POSTs used in the SBs in units of a partition coincide with each other.

Abstract: A POST management apparatus for managing a POST of an SB in a partition which operates in units of an OS using the CPU of the SB as a resource accesses the storage area storing the POST of the SB so as to perform read/write operation and to acquire/recognize the individual information on the SB and the version number information of the POST, transmits the POST of a predetermined version number according to at least one of the individual information and the version number information, and manages the version number of the POST so that the version numbers of the POSTs used in the SBs in units of a partition coincide with each other.

Abstract: An initial value generation circuit generates an initial value taking into consideration the a time delay when a signal is transmitted through the signal wires between a pilot device and other devices, and a processing delay caused in respective devices. When a device receives a system synchronizing signal form another device, the device sets an initial value in a counter. Thereby, the counter value of a counter in a pilot device and counter values of counters in the other devices are made to coincide with each other.