I had always heard that when running a distro in LiveCD mode, it does not touch the HDD. This is not the case for two of the four distros I am test-driving in LiveCD mode, namely MX Linux and Linux Mint. Within about half hour of runtime, both cause my hard disc to go into superspin cycle for at least a couple minutes. I am curious as to what is happening, and if it could harm the XP Pro on my HDD? The other two distros (AntiX and TAILS) does not affect my hard disc drive...and yes, I can tell the difference between the sounds of my DVD burner and HDD. My second question is related. If I go ahead and actually install MX Linux on my secondary HDD ('new' Western Digital bare drive #WD1001FALS in a mobile-rack), would that isolate it enough to stop it from messing with my primary HDD?