In Photoshop CS2's setting pane (Preferences--->Plug ins and Scratch disks). If your internal hd is not available for temporary usage by PS, you can assign the additional 3 scratch disk drives. PS stores active files temporarily on scratch disk so that you can keep working on PS. If there is not enough free HD space (ie. starving for the scratch disk space, I know PS will bog down (which happened to my old Ti PB as it only had 20GB before I upgraded it to 100 GB). Both of my Al PBs have 80 GB so I am not concerned about the scratch disk space (I store files on the external HDs). Even my iBook with 40 GB (19.5 GB free) is managing PS without scratch disk space problems.seenew said:How do you change your scratch disk?
What exactly IS the scratch disk/what does it do?
As of CS2, it's really an undo buffer. In past versions, it was a weird attempt to duplicate what virtual memory does.seenew said:What exactly IS the scratch disk/what does it do?