IBM FAStT200 HA, Installation And User Manual

Page: 32 / 114

14
IBM FAStT200 and FAStT200 HA Storage Servers Installation and User’s Guide
Non-redundant host and drive loops
The following illustration shows examples of configurations that have non-redundant
host and drive Fibre Channel. These configurations have a single path on the host
and drive Fibre Channel loop. If either path fails, the host is not able to access storage
until the path is repaired. The single controller (Model 3542-1RU) configurations have
a single Fibre Channel loop to the hard disk drives. These configurations have no
path failover protection.
Figure 5. Non-redundant host and drive Fibre Channel loop configurations
Host system
with one host
adapter
Host system
with one host
adapter
Host system
with one host
adapter
Host system
with one host
adapter
Host system
with one host
adapter
3542-1RU
3542-2RU
3542-1RU
Managed hub
or switch
Single path for
multiple hosts