Largest startup main drive recommendations

[RuffinMedia]

I have a 250g drive that is my primary\boot drive and I want to buy a bigger drive for partitioning. I was told (at one point) that my boot drive should be fast and small however nowadays I'm hearing it can be bigger. Whats the biggest size that is recommended for MacPro's. I was thinking about a 500gb but how big can I go?

MacPro quad core
Snow Leopard (and about to install Lion on a new partition)
9gb of ram

[nst7]

Partitioning of any kind is not recommended for Protools.

[RuffinMedia]

Wow i didn't know that ProTools didn't support partitioning. The only reason I wanna partition in the 1st place is because after upgrading to Pro Tools 10 then 10.0.1, Pro Tools is unusable. I started a post a few days ago and someone recommended making a partition and keep PT 9 on that partition as a fail safe setup.

http://duc.avid.com/showthread.php?t=316735

I'm pissed because I shelled out all this money for pro tools and I cant get a decent and stable setup.

[peterle]

there is no problem partitioning the OS Hd to keep older
os versions intact. You only should use a dedicatet physical
HD as audio drive.

In my Macpro (nehalem) i have 1,5 TB Hd`s without any problem.
But there may be problems with drives larger than 2 TB ,
since the cluster size may there be different...

regards

[RuffinMedia]

Yea, I'm only speaking for the OS boot drive. I have 2 separate, dedicated Audio drives installed as well.

1.5 tb for the boot drive? That seems awesome..