IBM FAStT200 HA, Инструкция по установке и эксплуатации

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Chapter 2. Installing the storage server
13
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.
Figure 4. Partially-redundant host Fibre Channel loop, and redundant 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
3542-2RU 3542-2RU
3542-2RU
Managed hub
or switch
Managed hub
or switch
Managed hub
or switch
Note: Node level
redundancy with
cluster software.
Note: Node level
redundancy with
cluster software.
Single link
Single link
Single link Single link