Returns or controls the manner in which the device
performs I/O data buffering. I/O data buffering allows
additional print job data to be buffered by the I/O sub-
system in an effort to allow the computer sending the
data to perform other tasks and to keep the PDL
processing sub-system busy. eOff, I/O buffering is
disabled. When eOn, I/O buffering is enabled and the
IO-BUFFER-SIZE object controls the amount of memory set
aside for I/O buffer. When eAuto, I/O buffering is
enabled and the I/O buffer size is determined
automatically by the device and the IO-BUFFER-SIZE
object is not used.