Tremor, you are saying your HDD have been running since 2001, are you saying you have kept your main PC on for 10 years, or have you been turning it off now and then?
Second, as always I end up being lazy checking back, so I'm first gonna check the links from the earlier posts and see what they have to say.
Honestly I have disabled the "sleep" mode on my HDD, as I often take 5 minutes to watch TV now and then, and there I am back at the computer and it goes into a 3 seconds freeze. (because of what I believe is the HDD waking back up to life) Which happened a few times each day so I ended up just turning it off, and instead I turn off my computer when I'm not going to use if for say 2-3 hours.
I read on some page that computers shouldn't be turned off that often, as when the temperature raises on the components "stuff" expands and when they then are turned off, they "unexpand" which can damage the components, no idea if this is true, but honestly, I have to say it sounds kind of logic. Still, I'm not sure if my PC ever reaches such a temperature that this actually have any effect on my components at all, so any thought about that?
I'll check back in a bit, I'm just gonna check out the links when I get the time, sort of busy, christmas time and stuff, you know, the normal December stuff..