I have the hard drive from a PowerMac G5, which was my old computer before it died and I upgraded to Ubuntu Studio.

The hard drive its self still works well, but on Ubuntu I can't access most of the files. I plugged it into my MacBook Air and changed some of the perms on some of the folders as a test. This worked for a few, but for others, I was getting the same message

Cannot access folder.  Access denied.

I would like to use this as an external HDD (I have a case and everything), but it's kind of pointless if I can't access the folders that I want. After looking around for a couple of hours, I couldn't find anything that actually gave me an answer.

I would like to know if:

1. Anybody else has come upon this problem,
2. If so, have you found a solution? and,
3. What is it?