Figure 1–4 shows a typical Fibre Channel cluster configuration using
transparent failover mode.
Figure 1–4: Fibre Channel Single Switch Transparent Failover
Configuration
ZK-1531U-AI
KGPSA
Member
System
1
Memory
Channel
KGPSA
Memory
Channel
Memory
Channel
Interface
Member
System
2
Fibre Channel Switch
HSG 80
Controller A
HSG 80
Controller B
RA8000/ESA12000
Port 1
Port 2
Port 1
Port 2
In transparent failover, units D00 through D99 are accessed through port 1
of both controllers. Units D100 through D199 are accessed through port 2 of
both HSG80 controllers (with the limit of a total of 128 storage units).
You cannot achieve no-single-point-of-failure (NSPOF) with the configuration
shown in Figure 1–4 because the switch represents a single-point-of-failure.
You can, however, add the hardware for a second bus (another KGPSA,
switch, and RA8000/ESA12000 with associated cabling) and use the Logical
Storage Manager (LSM) to mirror across the buses to achieve a NSPOF
cluster.
1–8 Fibre Channel Overview
