hello i have a problem with these drives seagate 1.5 TB model st31500341as cc1h firmware (which does not have problems with the second raid seagate) and supported the second d-lin, but it already happened that copying large amounts of data (from 10GB up) are blocked and are forced to reboot by unplugging the electric power to restart to rebuild the raid for 4-5 hours and therefore I can not use the dns 323 which could be the problem? thanks