Compaq AA-RHGWB-TE manual HSG80

•The units are divided between an HSG80 port 1 and port 2.

•If there are dual-redundant HSG80 controllers, controller A port 1 and controller B port 2 are normally active; controller A port 1 and controller B port 1 are normally passive.

•If one controller fails, the other controller takes control and both its ports are active.

Figure 6–4 shows a typical Fibre Channel cluster configuration using transparent failover mode.

Figure 6–4: Fibre Channel Single Switch Transparent Failover Configuration

Member

System

1

KGPSA

Member

System

2

KGPSA

DSGGA

HSG80

HSG80

RA8000/

ESA12000

ZK-1531U-AI

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 a no-single-poit-of-failure (NSPOF) configuration using transparent failover. The host cannot initiate failover, and if you lose a host bus adapter, switch, or a cable, you lose the units behind at least one port.

Using Fibre Channel Storage 6–9