I was looking for some backups recently for a disk that had unmounted front he desktop. When a disk does that I know that sometimes can be a signal of possible future failure, so I was keen to see that the backups for it were safe on the Time Machine disk. But when I went into Time Machine, I didn't see the backups for that disk. Is that the way Time Machine works? If a disk is unmounted you don't see its backups? That can't be right? signed, Worried. thanks!