Scratch Disks and Partitions?

[itakey]

I think I already know the answer to this question, but I figure i'll ask it anyways.

Is there any benefit to creating a scratch disk for a program like photoshop on a separate partition of a hard drive? So the scenario would be 2 partitions on a SATA drive, with one partition containing the OS, and the other used for a scratch disk.

Since this is the same physical piece of hardware my guess is that it may not be beneficial and that 2 separate physical hard drives are needed to benefit from scratch disking like this.

Anyone know for sure or have input?
Thanks.

 

[itakey]

Some more research and I answered my own.

You definitely do need a separate physical hard drive.

 

[0roo0roo]

?
ram is cheap now, with 3gb+ of ram do you really hit the scratch disk much?
harddrives are also fast now, to slow down it would have to hit the scratch disc while another program needed massive drive access as well.

 

[itakey]

I have 4GB going into my new rig
Figure I will probably set a scratch disk anyways but if I don't need it, even better.