Many thanks for your responses. It seems obvious now in hindsight. From you pointing me in the right direction I've also learnt that if I'd used df --si or df -H it would have given me the figures in powers of 1000 not 1024. You may still be able to recover some reserved space. sudo tune2fs -m 0 /de...

Hi. First post and a noob question - sorry if this is posted to the wrong section. I'm trying to set up a RPi2 as a backup server. I had a 2TB HD formatted as Mac OS Extended (Journaled) that I reformatted in the Mac to MS DOS. I attached it to the RPi2, and using the instructions at http://blog.ami...