M A G M A
Appendix B Need More Slots?
37
The following image shows the Apple Profiler display when a MAC has
2 Expansion Systems connected in a “Fan-Out” configuration
MAC System Profiler with 2 PCI to PCI Expansion Systems Installed
in a “Fan-Out Configuration.
Daisy-Chaining
Recognizing the typical insignificance of the performance variance
between the “Fan-Out” and “Daisy-Chaining” configurations, the primary
reason for using this one would be limitations on physical space. This
could be the number of available slots on the computer motherboard, or
a lack of desk or rack space.
In the daisy-chain configuration, successive PCI expansion systems are
added to the "end" of the PCI bus hierarchy, which adds "depth" to the
PCI Local Bus by increasing the number of PCI Local Bus levels active
in the system configuration.
