If the disk is not partitioned part --list doesn't show it and so we don't collect any data for that disk, showing in the view something like:
We should check du to get the size for those disks to show something like this:
/dev/sdb (10 MB)
/dev/sdc (5000 MB)
add disk size information when it's not present
Merged in master, @benburkert I don't have credentials to push the gem to rubygems though.