Non-Redundant Host And Drive Loops; Non-Redundant Host And Drive Fibre Channel Loop Configurations - IBM FAStT200 Installation And User Manual

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.
Host system Host system Host system
with one host with one host with one host
adapter adapter adapter
Managed hub
or switch
Single path for
multiple hosts
3542-1RU 3542-1RU
Host system Host system
with one host with one host
adapter adapter
3542-2RU
Figure 5. Non-redundant host and drive Fibre Channel loop configurations
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IBM FAStT200 and FAStT200 HA Storage Servers Installation and User's Guide