Hi, I've been trying to do this for some time, and I thought I had it sorted until I discovered a problem. Essentially, what I am currently doing is adding an entry to my crontab to spin-up and mount my 2 external Hard Drives at 3.55AM in preparation of an automatic backup which will start at 4.00AM. The commands I used were as follows: hdiutil mountvol disk2s3 hdiutil mountvol disk4s3 (my iPod mounted at disk3s3, hence the jump in disk numbers) However, upon rebooting my machine last night, I realised the disk2s3/disk3s3 no longer represented the drives they used to, so I was wondering if there was any way of mounting my drives based on their volume name 'eg. hdiutil mountvol 'Backup Drive 1'' etc to ensure only the correct drives mount, but it doesn't seem that this is possible. As I have a very limited knowledge of OS X Terminal commands and UNIX commands in general, I was wondering if anyone here could help solve my problem?