Patent ID: 6904022

Claim:
A data transfer control device for transferring data among a plurality of nodes that are connected to a bus, the data transfer control device comprising: determination means for determining whether or not a reset that clears node topology information has occurred during a data transfer period between a start of data transfer with respect to another node until a completion of the data transfer; command comparison means for comparing a content of a first command packet for a data transfer operation request that was transferred from the other node before the reset occurred and a content of a second command packet for a data transfer operation request that was transferred from the other node after the reset occurred; and restart means for restarting data transfer as a resumption of data transfer at a point at which the reset occurred, when it is determined that the reset that clears node topology information has occurred within the data transfer period and also when it is determined that the contents of the first and second command packets are the same.