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SECTION IV
Configuring Within IOM
Assignment priorities for DRE facilities in
descending order.
1)
FNP.
2)
DHP.
3)
Disk
(or tape if its transfer rate is
higher).
4)
Tape.
a.
I/O channel traffic will be heavy.
The DRE
feature significantly cuts memory accesses by
each logical channel assigned to it, by as much
as 3 to 1.
This frees memory cycles for use by
processor or
IOM.
When do you need more than one DRE?
Permitted only on freestanding IOM.
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