and the same data is mirrored on a different pv pv 1 and at a different position this will be discussed further with respect to the flowcharts of fig4 and 5 fig4 is a flowchart of one version of the dynamic resynchronization process of the invention the assumption is that there has previously been a system failure resulting in the need to resynchronize the storage system and that a sequential resynchronization of the lvs in the system has commenced but is not yet completed immediately after the system failure a signal is set at each lv indicating the need for resynchronization and during the sequential resynchronization process as each lv is reached and resynchronized this resync need signal is removed from the resynchronized lv thus while this resynchronization is going on the storage system is also being normally accessed also for convenience in description we will assume that the mirrored data is contained in two rather than three lps in step 60 an application on the data processing system requests a read of block 0 on a lv lv 1 the particular logic and pvs are respectively illustrated in fig2 and 3 thus in step 61 lv 1 gets a read request for block 0 the logical data in lv 1 block 0.