I have the following scenario:
I want to automatically backup some data from my Laptop(Fedora Core 17) to a external encrypted(luks) hard disk.
The disk can be opened by a key file, which lies on the also encrypted root partition of my laptop.
The hard disk is attached to my docking station and therefore only "present" when I am at home (which is approximately 1/2 of the time the Laptop runs)
I have everything set up the way I want it with one exception.
I don't get a decent way to mount the hard disk automatically at boot if and only if it is present.
If I add it to crypttab and fstab without
noauto it tries to mount it at boot and takes a lot(!) of time and error messages when it is not present. If I add noauto, well it does not mount automatically 😉
Is there a way to configure luks/crypttab to do the following:
- check whether the disk is present
- if yes: decrypt/mount
- if no: just don't