3.Alternate path between the FC Switch Modules

Blade Enclosure #1

Blade Enclosure #2

Blade Enclosure #3

„By making cascade connection among all three FC Switch Modules, even if a

failure occurs on one cascade path, no influence to I/O operation occur because communication between FC Switch Modules can be succeeded by the alternate path and no Fabric reconstruction occur.

„Cascading four FC Switch Modules (Blade Enclosure)

1.Configuration with minimum number of cascading paths

Blade Enclosure #1

Blade Enclosure #2

Blade Enclosure #3

Blade Enclosure #4

„If a failure occurs on the cascading path between the FC Switch Modules, a

Fabric reconstruction occurs. Influence to I/O operations may occur not only between the cascading FC Switch Modules but within each FC Switch Module (each Blade Enclosure).

- 112 -