Controlling an unreliable data transfer in a data channel

An apparatus for controlling an unreliable data transfer in a data channel from a transmitting unit to a receiving unit, comprising:

• a bypass line;
• a buffer line connected in parallel with the bypass line;
• an error detecting and correcting unit;
• a buffer unit serially connected with the error detecting and correcting unit by the buffer line;
• a probation switch that switches to the bypass line or the buffer line depending on an error rate in the data channel;
• wherein the transmitting unit and the receiving unit are directly connected by the bypass line;
• and
• wherein the transmitting unit and the receiving unit are connected by the buffer line via the error detecting and correcting unit and the buffer unit;
• a lower level cache;
• and
• a higher level cache, wherein the data transfer is from the lower level cache to the higher level cache.

A computer program product for controlling an unreliable data transfer in a data channel from a transmitting unit to a receiving unit, said computer program product comprising:

• a non-transitory computer readable medium;
• first program instructions to activate a bypass mode or a buffer mode depending on the error rate in the data channel;
• second program instructions to, if bypass mode is selected, directly transfer data packets in probation from the transmitting unit to the receiving unit by a bypass line, wherein the data packets are error checked after the data transfer;
• third program instructions to, if buffer mode is selected, transfer data from the transmitting unit to the receiving unit by a buffer line via an error detecting and correcting unit and a buffer unit, wherein errors are detected and corrected during the data transfer;
• wherein the data transfer is performed from a lower level cache to a higher level cache;
• and
• wherein said first, second, and third program instructions are stored on said computer readable media.