HardDrive not going to Sleep? I have just upgraded by 3 year old MacBook Pro. To extend it somewhat, I put in 8GByte RAM and replaced the 246 Gbyte HD with a 500Gbyte one (Samsung device). However, I've noticed something which is troubling me.. I usually have by MacBook sitting in a Cradle hooked up to a monitor with a Bluetooth Keyboard and TrackPad. This was the configuration before upgrading and this has worked no problem for 3 years. Now, however I noticed having put the machine to sleep at returning a but later that the computer was warm. When I put my ear to the machine I can hear the HD spinning. I don't know why this is? Can anyone help me please?