dd if=/dev/source of=/dev/dest bs=512 count=12011/10/04
2011/09/28
mdadmin
Rescan md-device
mdadm --assemble --scan
Stop md-device
Stop all service using device, samba, nfs
mdadm --manage --stop /dev/md0
Readd md-device
mdadm --manage --add /dev/md0 /dev/sdc2