|Yep, I was the one that made that recommendation. Have you seen their reliability stats & failure rates? Much higher than "normal" HDDs. Seagate had an extremely bad run on 1TB HDDs early this year with approx 30-40% failure rate.|
Even if you were to create a small partition for the OS (which you should do regardless of HDD size), it doesn't change the fact that you're running it from a 1TB HDD. Generally speaking, a single platter HDD is more reliable that a dual platter HDD & a dual platter is more reliable than a triple platter HDD. The more moving parts you have, the more likely that something will fail. And be honest, do you really need 931GB of storage capacity (true size of a 1TB HDD)?
Do what you want, I'm just stating my opinion. If you feel secure with a 1TB HDD, who am I to say differently? Just make sure you have a backup plan in place because if the drive were to fail, you could potentially lose 100's & 100's of GB of data.
BTW, do you know how long it takes to format a 1TB HDD?
"I suggest to split the hdd on half..."
And from a maintenance standpoint, how long would it take to defrag a 500GB, er, 465.5GB partition?
hard drive partitioning strategies