Process for the preparation of integrin inhibitors of the formula, in which R1, R2, R3, R4, R5 and X have the meanings indicated in Claim 1, and intermediate compounds. A logical disk management unit converts inputoutput requests addressed to the logical disks into IO requests addressed to corresponding physical disks, and outputs the converted IO requests. A second signal is transmitted to an input stage of the at least one stage to stall the main latch of the input stage during the second cycle and to stall the main latch and the shadow latch of the input stage during a third cycle.