I wanted to change the uuid on a component of a md raid1 array.
I found the following worked and didn't delete any data: mdadm --create /dev/md1 --level=raid1 --force --raid-devices=1 /dev/sdb3 but I couldn't find any way to change the uuid in the member without creating the array like this. This didn't work mdadm --assemble --update=uuid /dev/md/1 Started the array but didn't change the uuid This doesn't work at all mdadm --assemble --update=uuid /dev/sdb3 Is there a good way to do this without starting the array?
