556 IBM TotalStorage: SAN Product, Design, and Optimization Guide
to 12:1, and reduced the maximum SAN server bandwidth to 20.8 MBps per
server. This design is a much more cost-effective solution.
16.1.5 Availability
While this design provides a higher-availability design than for the single director
model, a failure in the SAN fabric could result in all hosts losing access to the
devices. For example, if an invalid zoning change was made to the fabric or the
fabric was corrupted, this would affect all devices in the SAN.
The Cisco MDS 9000 family provides Virtual Storage Area Networks (VSAN)
technology, which is a way of creating logically independent fabrics across the
same hardware platform. We will illustrate solutions based on VSAN technolog ...