Communicator e3000 MPE/iX Release 7.5 (Software Release C.75.00) (30216-90336)

Chapter 4
Fibre Channel Device and Adapter Support on HP e 3000 Systems
Configuration Examples for Fibre Channel Adapters and Devices
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Configuring Fibre Channel Adapter Card
The steps needed in SYSGEN to configure a Fibre Channel adapter card, i.e., one at path 0/8/0/0. As with the
SCSI adapter, start by configuring System Bus Location equal to zero (“0”). Then configure Local Bus Number
equal to eight (“8”), PCI Device equal to zero (“0”), and PCI Function equal to zero (“0”). In most cases, the
System Bus component and Local Bus number component may already be configured. If so, directly proceed
to configure the PCI Device component.
io> ap 0 id=pat_ioa_bc
io> ap 0/8 id=pat_pci_bc
io> ap 0/8/0 id=pci_device
io> ap 0/8/0/0 id=A6795A
<< This is the FC Device Adapter Card (from Example #1) >>
Checking that the FC Device Adapter Card is properly configured:
io> lp 0/8/0/0
PATH: 0/8/0/0 LDEV:
ID: A6795A TYPE: DA
PMGR: FC_DAM PMGRPRI: 6
LMGR: MAXIOS: 0
Note that the PMGR should be set to “FC_DAM,” which is the new manager software for FC device adapter
card.
Understanding Fibre Channel Device Paths
Before identifying fibre channel devices connected to the adapter, let us understand about Fibre Channel
device hardware path format used in MPE/iX. Unlike a SCSI device path, a Fibre Channel device path is
interpreted differently. The path format used in MPE/iX for a fibre channel device is given below:
System Bus Location / Local Bus Number / PCI Device / PCI Device Function. FC Nport . FC LUN
Note that the second to last component here is “FC Nport” whereas in case of SCSI devices it would have been
a “SCSI Target”. The FC Nport represents a “fibre channel node port” which represents the connection point
for a fibre channel device. Under the FC Nport, there can be multiple LUNs of the FC device, which are
accessible in the same way as SCSI LUNs. A single FC device can support multiple Nports and each Nport
can have varying number of LUNs under it. This is analogous to multiple SCSI LUNs under a SCSI Target.
The last component in the FC path represents an “FC LUN” while in a SCSI device path it would be a “SCSI
LUN”. Although the FC LUN is functionally the same as a SCSI LUN, it is termed differently to signify that
it can take on much larger values.
Determining Fibre Channel Devices Connected to an FC Adapter Card
There is no way in the Boot Command Handler (BCH) Main Menu to identify the FC devices connected to an
FC adapter card. Running ODE MAPPER2 from ISL does help to identify some FC devices but even this may
not list out all FC LUNs under the FC devices. But for configuring in MPE/iX we ultimately need the FC LUN
paths. In order to assist the System Administrator in identifying the FC devices and LUNs accessible from a
FC adapter card, MPE/iX 7.5 comes with a new utility called FCSCAN. This utility is present in the system as
“FCSCAN.PUB.SYS”. Before using this utility to identify FC devices/LUNs under a FC adapter, you need to
configure the FC adapter in SYSGEN using the steps mentioned above and reboot the system. (If the FC card
is configured online using online configuration tool IOCONFIG instead of SYSGEN, the reboot is not
required).