Patent ID: 8239634

Claim:
An input/output control system of an information processing apparatus that includes a first storage portion and a second storage portion and carries out an input/output processing using a part or whole of said first storage portion as a cache area, said input/output control system comprising: a cache managing unit configured to store data, which is inputted from or outputted to said second storage portion, in said cache area; an input/output specification information storage unit configured to correlate a data area for said data stored in said cache area, and information with regard to input/output to store said correlated data area and information; a write-back unit configured to generate an output request of said data from said data area in said cache area to said second storage portion; and an input/output specifying unit configured to specify said information with regard to input/output correlated to said data area of said data which is a target for said generated output request, by referring to said input/output specification information storage unit, and transmits information with regard to input/output which cannot be specified due to an operation of said write-back unit to an input/output processing unit in said second storage portion, wherein said information with regard to input/output includes at least one of information specifying an issuing source of said input/output, and priority of said input/output which corresponds to said issuing source.