you can't get into the drive because you were using a '/' in front-that tells the kernel to look in the root directory, maybe not where your shell was at the moment.
Doesn't look like a root prompt either, should have the '#' in front of it.
try this and post the output...
1-open a shell
4-find where mac disk is mounted
5-change to directory where mac disk is mounted (/media?)
6-pwn all files under there
(note the period at the end above)
7-give all perms to all files under there
Also try copying files rather than moving them. If you want to put all files under the current directory on your desktop...
cp -Ruv . ~/Desktop
please post the output of these commands-hopefully they work.