>Do you have any "history" with the adapter you connected them to? If not consider it as a possibility as well >(from bad experience of total filesystem/partition corruption on two hard drives only to discover it was >something on the motherboard). Actually yes I used them many times back on C7.5 Both the motherboard and USB adapter. Thanks, Jerry _______________________________________________ CentOS mailing list CentOS@xxxxxxxxxx https://lists.centos.org/mailman/listinfo/centos