SyZy, on 02 May 2012 - 12:57, said:
This is the first time I'm using a laptop; all these years I've used only a desktop.
I read full books on the laptop. What I do is I lie down on the bed and keep the laptop on the side - not resting on its bottom(!) - and read books this way. Sometimes I hold the laptop on my chest and my arm keeps swaying from time to time.
From what I know, hard disks should not be moved when they are running. So considering the way I'm using the laptop, will the hard disk get damaged?

I have two laptops, and both have been dropped on the floor when they were on in the past and still run great (one was bought in 2008 and has had all kinds of abuse, I once accidentally left it on while it was in my backpack and the thing felt like it was on fire).
Now I certainly wouldn't recommend dropping your laptop, but moving it around a bit during use should not cause any issues

. I always use my laptops like this to watch tv/movies etc... Most modern laptop drives have prevention measures like frequent head parking and shock protection to avoid being easily damaged, just a little swaying will not do anything.
I also had one incident, where I knocked over my pc tower during a large file transfer between drives (I went to pull my chair back, it caught the edge of the tower and the thing slammed on the floor pretty hard). I was super paranoid that I destroyed my drives or something, but I'm still using those drives fine today

.
Of course you should always have backups regardless! hdd's are mechanical and can and will fail unexpectedly.