It's going/gone well. I reran the parity check and corrected the errors which, now that i think back, may well gave come from an unclean powerdown some time since the last check ran on 1st of last month. With the errors corrected i reran another check and all still clean. I'm now busy running md5 checks (corz) against each disk with minimal reported errors. So far, so good. Thanks for all the help everyone. If nothing else i now know the procedures if it ever happens again! Sent from my LG-D855 using Tapatalk