Specifications

Chapter 5. Planning 135
Another scenario for the p260 is one in which the redundancy in the configuration
is provided by the Fibre Channel switches in the chassis. There is no hardware
redundancy on the compute node, as it has only two expansion cards, with one
used for Ethernet access and the other for Fibre Channel access. For this
reason, in the case of Fibre Channel or Ethernet adapter failure on the compute
node, redundancy is maintained. Figure 5-5 shows this scenario.
Figure 5-5 Dual-SAN switch connection with the IBM Flex System p260 Compute Node
5.5 Dual VIOS
Dual VIOS is supported in the Power Systems compute node. This configuration
has certain limitations based on the computer node and the hardware installed
on the computer node.
To have dual VIOS support, you need:
򐂰 A system managed by IBM Flex System Manager.
򐂰 An IBM Flex System p460 Compute Node. The p260 does not have enough
expansion cards for dual VIOS.
򐂰 Three expansion cards (one Ethernet and two FC for each VIOS).
The p260 supports only two expansion cards. Internal disks are attached to only
one PCI bus, so only one VIOS can manage internal disks. Therefore, to have
dual VIOS, you need two Fibre Channel adapters and one Ethernet adapter,
which is one more than the two supported on the p260.
Chassis
Compute node
EN adapter
DS3400 Storage
V7000 Storage
SAN switch
SAN switch
Storage Area
Network
FC switch
FC switch
FC adapter