Limitations apply to switch zoning for the
system and the HP MA and EMA systems.
Attention: The HP MA and EMA systems are supported with a single HSG80 controller or
dual HSG80 controllers. Because the
system
supports only those configurations in which the HSG80 cache is enabled in write-back mode, running
with a single HSG80 controller results in a single point of data loss.
Switch
zoning
Forsystems that have installed software version 1.1.1, a single Fibre
Channel port that is attached to the system can be present in a switch zone that containsthe systemFibre Channel ports, whether the HP MA or EMA system uses one or two HSG80
controllers. This guarantees that the nodes in the system can access at most one port on the HSG80
controller.
For systems that have
software version 1.2.0 or later installed, switches can be zoned so that HSG80 controller ports are
in the switch zone that contains all of the ports for each
node.
Connecting to the SAN
Multiple ports from
an HSG80 controller must be physically connected to the
Fibre Channel SAN to enable servicing of the
HP MA or EMA system. However, switch zoning must be used as described
in this topic.
Note: If the HP Command Console is not able to access
a Fibre Channel port on each of the
HSG80 controllers in a two-controller system, there is a risk of an
undetected single point of failure.