Chapter 6. IBM System x3850 X5 and x3950 X5 295
Fibre Channel over Ethernet (FCoE)
FCoE is the transport, or mapping, of encapsulated FC frames over the Ethernet. The
Ethernet provides the physical interface, and FC provides the transport protocol. System
setup for FCoE requires Converged Network Adapter (CNA) to pass both network and
storage data connected to 10Gb converged network infrastructure.
Internet SCSI (iSCSI)
iSCSI is an Internet Protocol (IP)-based storage networking standard for linking data
storage facilities. The protocol allows clients (called
initiators) to send SCSI commands to
SCSI storage devices (targets). A hardware initiator might improve the performance of the
server. iSCSI is often seen as a low-cost alternative to Fibre Channel.
serial-attached SCSI (SAS)
SAS uses point-to-point connection and the typical SAS throughput is 6 Gbps full duplex.
Where a complex SAN configuration is not necessary, SAS is a good choice, although
performance and distance will be limited compared to the other solutions.
Booting from SAN
This section provides useful guidelines for booting from SAN:
See 6.1.1, “Verify that the components are securely installed” on page 220 to ensure that
all PCI adapters are seated properly.
Check if UEFI recognizes the adapter. Select UEFI System Settings Adapters and
UEFI Drivers. The Adapters and UEFI Drivers panel displays, as shown in Figure 6-80.
You need to see Card - HBA. If not, reflash the UEFI, IMM, and Firmware of the HBA and
check again.
Figure 6-80 Adapters visible in UEFI
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