i'm facing the same issue with mdadm raid mirroring disks. I have cloned my original sda disk to the new sda disk (via clonezilla). The original disk has configured to use raid mirroring but only one brick (the current one) is available.
After finishing clonezilla restoration, i have added a brick to raid mirroring for sdb disk. At the end i have updated grub to both disks. I have done this to almost 300 machines. But in some rare cases (2) ubuntu is missing important files that was created after the installation (clonezilla and raid). I suppose that "the missing files" issue is about that the ubuntu somehow decided to boot from sdb disk, although should be identical to sda (because of mirroring), some files are missing! Weird! Isidoros -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1306237 Title: Ubuntu 14.04 final beta - files disappearing To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1306237/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs