Epson Stylus PHOTO 950 User Manual page 190

Spooling RAW datatype requires less resources than EMF, so
some problems ("Insufficient memory/disk space to print",
"Slow print speed", etc.) can be solved by selecting the Always
spool RAW datatype check box.
Note:
When spooling RAW datatype, print progress as displayed by the
Progress Meter may differ from actual print progress.
Monitoring Preferences
Click this button to open the Monitoring Preferences dialog box,
where you can make settings for EPSON Status Monitor 3.
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Printing with Windows