I would recommend you to move the whole disk to another known working machine when this happens again to make sure this is not a hardware issue.
As for /var directory you saved, root is root universally. You should be able to examine its content in some live CD session or so.
I would recommend you to move the whole disk to another known working machine when this happens again to make sure this is not a hardware issue.
As for /var directory you saved, root is root universally. You should be able to examine its content in some live CD session or so.