I'm trying to erase an external disk drive that I had been using as a backup disk. There are no options for me to securely erase - the option just isn't there at all.
It is currently formatted as MAC OS Extended (Journaled, Encrypted).
I have a second HDD drive that when mounted shows the security options when erasing.
Any ideas what is going on here? This is a new problem for me; I'm sure I've secure erased this disk before.
Edit: I've just noticed that the only difference between the two disks is that the one that could be securely erased is down as a 'USB External Physical Volume' whereas the disk I'm having the problems with comes up as a 'CoreStorage logical volume'. Is this the issue?