Partially-Redundant Host And Redundant Drive Loops; Partially-Redundant Host Fibre Channel Loop, And Redundant Drive Fibre Channel - IBM FAStT200 Installation And User Manual

Partially-redundant host and redundant drive loops

The following illustration shows examples of configurations that have partially-
redundant host loops. Partially-redundant host loops have a single link or device in
the path between the host and the RAID controller. The single links and devices on
the host Fibre Channel loop are single points of failure. If the single link or device fails,
the host is not able to access storage until the link is repaired. The host links that have
multiple paths to the storage server have path failover protection.
Host system
with one host
adapter
Single link
Managed hub
or switch
3542-2RU
Host system
with one host
adapter
Single link
Managed hub
or switch
Figure 4. Partially-redundant host Fibre Channel loop, and redundant drive Fibre Channel loop
configurations
Host system
with one host
adapter
Single link
Managed hub
or switch
3542-2RU
Host system
with one host
adapter
Single link
3542-2RU
Chapter 2. Installing the storage server
Host system
with one host
adapter
Note: Node level
redundancy with
cluster software.
Note: Node level
redundancy with
cluster software.
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