Lost permissions to all external hard drives
A few weeks ago I had to bring in my mac to the genius bar for a repair. It needed a new track pad (stopped responding), and to reinstall Mail (had gotten corrupt).
When I picked my computer back up all seemed fine, until I tried to play music, access photos and some other items on my external hard drives (And even some files on my internal hard drive). I can't play music because it says I don't have access to the drives.
I went to the Disk Utility, however "Repair Disk Permissions" is grayed out for every single external hard drive. "Verify Disk Permissions" is also grayed out. I then tried to go to the hard drive in the Finder - right-clicked, and clicked "Get Info" the external hard drives are all locked and the locked checkbox is grayed out. Permissions is not editable at all and just says "you have permission to read this drive"
I tried doing this (based on some searches I did on this topic):
sudo chown root "/Volumes/volumename/"
sudo chmod 1775 "/Volumes/volumename/"
sudo -k
but nothing appears to be working.
Please Help!
15" Mac Book Pro, Mac OS X (10.6.6)