Figure 13 shows how the real
and logically appear when alternate channels are specified. Note that
the subordinate control unit blocks do not contain pointers to the
alternate channel blocks.
pointers to the alternate
Figure 13. Real
Specification
The following restrictions apply directly to Alternate
attention interrupts to invoke a read response from the
example, the 3851
that issue
host; for
alternate path or no alternate path. There can be no splitting of
control units when dealing with alternate paths.