I am trying to re-assemble an mdadm raid array I was using in ubuntu. I ran the command:
sudo mdadm --assemble /dev/md0 /dev/sda1 /dev/sdb1 /dev/sdc1 /dev/sdd1
While the command line responded positively, I received several dialogs stating "cannot obtain lock on media .hal-mtab".
The raid didn't seem to get re-assembled.
Anyone know how to hunt this down?