garyed
Thanks for all the info, I hadn't thought about a third drive for sample libraries too. Great idea.
It's just a pity that the kind of
external drives that are sold in big box retail stores like Best Buy don't have a guaranteed spin speed. They used to. You used to be able to get a Western Digital external that was rated at 7200 rpm, but now they don't have any rating on them and when you contact the manufacturer they tell you that the spin speed is variable (some green energy saving BS). Not everyone has space for 3 internal hard drives in their computer tower, plus it's nice to have portability where your audio projects or sample libraries are concerned. However there are audio-quality (7200rpm+) externals out there, can't remember any names but you'll find them if you Google them.
Another thing to consider if you're going to use an external is the interface - USB 2.0 doesn't really cut it for heavy multitrack streaming, and if you don't have Firewire then your other options are USB 3.0 (not sure how well this works with DAW's yet) or eSATA. Actually an eSATA drive is a pretty good option - I've seen audio quality eSATA externals advertised.
I have two drives in my tower, the second one which I use for audio is a 2TB Western Digital Black Caviar and it works great. I've heard people say that smaller drives are advisable because they're more reliable, but I don't know how true this is and certainly haven't had any problems.
One more thing I will say is that the location of where you store things on your HD is important. Spin speeds are faster on the outside of the disk, so if you're going to partition the drive for multiple usage then it's advisable to store anything that's going to be streamed on the first partition (when you work with a partition diagram on screen, the leftmost side of the block is the outside of the disk). For instance, I also use my 2nd drive to store disc image backups. I keep those on the right hand partition (inner disk) because speed isn't as important for saving those.