As with other device adapter cards for HP e3000, fibre channel adapters can
also be configured through the MPE/iX utility SYSGEN. Assume a Fibre Channel
adapter card at path 0/8/0/0. Start by configuring the first path component
System Bus Location equal to zero "0". Then configure the 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
To check that the FC Device Adapter Card is properly configured:
Note that the PMGR should be set to "FC_DAM," which is the manager
software for FC device adapter card. After configuring the adapter card
through SYSGEN, reboot the system. (If the FC card is configured online using
online configuration tool IOCONFIG instead of SYSGEN, the reboot is not
required).
When the system is rebooted with FC adapter configured, the software driver
for the FC adapter initializes the card and identifies FC devices connected to
the card. At this time, a message appears on the system console saying:
td: claimed Tachyon XL2 Fibre Channel Mass Storage card at 0/8/0/0
Scanning for fibre channel devices at 0/8/0/0. This may take a while...
The appearance of this message indicates that the card has been initialized
successfully and the software identified any FC devices connected to this
adapter card. The list of FC devices/LUNs thus identified is not printed
immediately. This list can later be generated by running another
MPE/iX utility called FCSCAN, which can be run from the MPE/iX CI prompt.
Understanding Fibre Channel Device Paths
Before identifying and configuring fibre channel devices connected to the
adapter, 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 used in MPE/iX to represent 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 the case
of SCSI devices it would have been a "SCSI Target". FC Nport 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 FC Adapter
There is no way in the HP e3000 system firmware 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 the LUNs
under the FC devices. 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 an FC adapter card, MPE/iX provides a new
utility called FCSCAN. This utility is present in the system as
"FCSCAN.PUB.SYS".
Before using FCSCAN to identify FC devices/LUNs under an FC adapter, you need
to make sure that the FC adapter has been configured in the system. The steps
mentioned under the section "Configuring Fibre Channel
Mass Storage Adapter" should have been completed before running FCSCAN
utility.
A sample output generated on running the FCSCAN utility is shown below:
:fcscan
FCSCAN has found the following Fibre Channel I/O Adapter Cards
and Devices on this system.
SYSGEN PATH DESCRIPTION BOOT MENU PATH
============= ============= ================
0/8/0/0 Fibre Channel Adapter
0/8/0/0.0 Fibre Channel N-Port
0/8/0/0.0.0 HP OPEN-3 disk 0/8/0/0.8.0.0.0.0.0
0/8/0/0.0.1 HP OPEN-3 disk 0/8/0/0.8.0.0.0.0.1
0/8/0/0.0.105 HP OPEN-3 disk 0/8/0/0.8.0.0.0.13.1
0/8/0/0.95 Fibre Channel N-Port
0/8/0/0.95.0 HP A6188A disk 0/8/0/0.8.0.95.0.0.0
0/8/0/0.95.5 HP A6188A disk 0/8/0/0.8.0.95.0.0.5
0/8/0/0.95.10 HP A6188A disk 0/8/0/0.8.0.95.0.1.2
0/8/0/0.95.50 HP A6188A disk 0/8/0/0.8.0.95.0.6.2
The output from FCSCAN shows the list of FC adapter cards and devices present
in the system. The hardware paths printed by FCSCAN can be directly used in
SYSGEN to configure the corresponding device.
The output from the FCSCAN utility shows the following information:
SYSGEN PATH:
Hardware path of the FC adapter card or device. This is the path
which is to be used in SYSGEN to configure the card or device in
the system.
DESCRIPTION:
Description about whether the path specifies an FC card or device.
If device, it also specifies the model and type of the device.
BOOT MENU PATH:
Path value for an FC device to be used in the system Boot Command
Handler or firmware Main Menu to set that particular device as the
primary path. The boot menu path is a detailed long format path
unlike the simplified SYSGEN path. It is necessary to use this
long path in boot menu because the system firmware can understand
only this format to access devices. To install on, or boot from an
FC disk, the primary path will be set to this long path for that
disk as printed by FCSCAN.
The above sample output shows that there is a Fibre Channel Adapter card
configured in the system at path 0/8/0/0. Under this card, there are some
devices listed.
Path 0/8/0/0.0 shows an FC N_Port (Node Port) which indicates the fibre
channel port of a device connected to the card. FC N_port is required to be
configured in SYSGEN while configuring devices. The output also shows three
disks of type HP OPEN-3 shown with paths 0/8/0/0.0.0, 0/8/0/0.0.1 and
0/8/0/0.0.105. The last components of these paths refer to the LUN number of
these disks. The type HP OPEN-3 usually refers to an XP512 device disk. Since
the hardware paths of these three disks come under Nport 0/8/0/0.0, they all
fall under the same Nport in the XP512 device.
Path 0/8/0/0.95 shows another FC N_Port (Node Port) indicating another device
is connected to the card. Under this N_Port, there are four disk LUNs of type
HP A6188A shown with paths 0/8/0/0.95.0, 0/8/0/0.95.5, 0/8/0/0.95.10 and
0/8/0/0.95.50. The type HP A6188A refers to the Virtual Array device A6188A.
FCSCAN utility provides a list of all device N_Ports and LUNs connected to the
adapter card. This information should be used to configure them in SYSGEN.
Further details on FCSCAN utility and the steps for configuring FC device LUNs
are covered in the MPE/iX
Release 7.5 Communicator document.
NOTE: If FCSCAN output shows only the adapter card but no devices
under it, then most likely the device has not been connected properly.
Verify the FC cable connecting the FC device to the adapter. Try again by
running FCSCAN with "-h" option. For more details how to run FCSCAN with
this option, refer to the MPE/iX 7.5 Communicator document.
Complete PDF