A hard disk used by a program such as Adobe Photoshop to store temporary (or "scratch") files while the program is being used. Image editing programs are often used to edit very large graphics files--files much too big to fit in the computer's memory. A scratch disk is used to store temporary copies of the image while it is being edited. Many programs require a great deal of free space on their scratch disks; image editing programs, for example, may want free space equal to five times the size of the file being worked on.
Portion of existing hard disk space reserved by an application for use as temporary working space.
The disk or disk space you allocate in Final Cut Pro for digital video capture and editing.
A blank disk or a disk with files you no longer need.
a convenient way to bridge the gap when the amount of memory Photoshop needs is greater than the amount of memory you have installed
The disk used by Photoshop to replace physical RAM. This is defined in Photoshop's preferences. To work best the program needs free space on the scratch disk equal to about 4 times your file size. If you do not have this much free space you may get an inadequate memory message while editing your picture. Normally it is best to either have a very large hard drive to work with or have a separate disc for use in image editing.
(Also known as virtual memory) Hard drive storage space that is designated as work space for processing operations and for temporarily storing part of an image and a backup version of the image when there is insufficient RAM available for those functions.
