Get my Root's Hard Drive name through CLI (or Applescript)

Question

How do I retrieve the current name of my hard drive through the command line? It needs to be in a way that will allow me to easily parse it. I first tried this:
$ ls -l /Volumes/ | grep -E '> /$'
lrwxr-xr-x 1 root admin 1 Feb 2 17:25 demoive HD -> /
which is pretty close, except for removing all the other stuff would be tricky (due to all the variations that could occur in different scenarios). So then I tried the following:
$ diskutil info -plist / | grep '<key>VolumeName</key>' -A 1 | tail -n 1
<string>demoive HD</string>
which is more robust in my mind and totally works, however, it causes my optical drive make the little noise indicating that it's checking to see if I have a disk...and that sort of thing won't suffice for what I need (both because of the noise and delay of ~1.5 seconds).
If someone knows of a way through AppleScript, that would work too as I can use the 'osascript' command via the command line.
Cheers.

Answer 1

Three AppleScript examples:
osascript -e '"/" as POSIX file' | sed -e 's/:$//'
osascript -e 'tell app "Finder" to get name of startup disk'
osascript -e 'item 1 of (list disks)'
If you want to avoid disktool (because it's deprecated) and also want to avoid AppleScript (bacause it's slow), another possibility is something like
#!/bin/zsh
cd /Volumes
for d in *(@-/) # use * for bash
do
if [ "$(readlink "$d")" = '/' ]; then echo $d; exit; fi
done