192
Hardware
Installation
Select one of the following configuration options to connect and configure one or
more storage arrays for use with the Synchronous Mirroring premium feature.
Table 1 Configuration Options for Synchronous Mirroring
Configuration Description
Highest availability
campus configuration
(recommended)
This configuration has the greatest redundancy. It is the most stable of the three
configurations.
Two Fibre Channel switches (for a total of four) at both the primary site and
the secondary site provide for complete failover and redundancy in the Fibre
Channel switches and fabrics, in addition to all storage array components
and hosts.
A single point of failure does not exist in this configuration, and it is the
recommended configuration for the Synchronous Mirroring premium
feature.
Go to "Highest Availability Campus Configuration – Recommended" on page
194.
Campus configuration The campus configuration is a lower-cost configuration than the highest
availability campus configuration. Only one Fibre Channel switch at the primary
site and one at the secondary site exist, for a total of two switches. This
configuration essentially allows the minimum required components to
successfully operate the Synchronous Mirroring premium feature between two
sites.
The number of Fibre Channel switches is reduced from four to two and the
number of fabrics from two to one.
This configuration is redundant for host bus adapters, controllers, and
Synchronous Mirroring ports, but it has a single point of failure for switches
and fabric.
A switch failure does not usually result in a loss of data, but it does affect
data synchronization until the error is corrected. Therefore, the highest
availability campus configuration is the recommended configuration,
because data synchronization can continue for any single switch failure.
Go to "Campus Configuration" on page 202.
To Next Page
Loading...
