MF Digital DIRECTOR CD/DVD Combo Series (Rev: 08/01/02) - Manual (Page 61)

DIRECTOR Series Operator’s Guide Document Revision: 0802
Page 60
Saving The Current Disc Image File
Once a data disc image has been created, it must be saved for the DIRECTOR
to use it as a data source for recording. Disc images can either be saved as
script files (with an “ISC” extension) or physical image files (with an “ISO”
extension).
A script file (ISC) contains pointers to the source data files and is used as a
guide at the time of recording the CD. Since a script file does not include the
source data it is best used when producing unique projects with dynamic
content, or when the source data will always be available to the DIRECTOR.
Or, if producing software, a “static” image would be best to ensure content.
A physical image file (ISO) is an exact replica of the final CD and contains all
of the source data. It is therefore best used when producing static projects
that are recorded on a regular basis, and when source data will not always be
available to the DIRECTOR. Please note that, depending upon the amount of
data to be recorded, a physical image file can occupy as much as 700 MB of
hard disk space.