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CHAPTER 4 PCI Card Hot Maintenance in Red Hat Enterprise Linux 6
4.6 Hot Replacement of PCI Express Cards
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C122-E175-01EN
In this case, check for the relevant message on the FC card incorporation by using the following
procedure.
a. Confirm the host number.
xx in scsixx (xx is a numerical value) in the message is a host number. In the above example, the
host number is 10.
b. Check whether the following file exists by using the host number.
/sys/class/scsi_host/hostxx/modeldesc
(xx in hostxx is the host number entered in step 1.)
If the file does not exist, the judgment is that no such message was output from the FC card.
c. If the file exists, check the file contents by using the following operation.
# cat /sys/class/scsi_host/hostxx/modeldesc
Emulex LPe1250-F8 8Gb PCIe Fibre Channel Adapter
(xx in hostxx is the host number entered in step 1.)
If the output is like the above, the judgment is that the relevant message was output by the
incorporation of the FC card.
4.6.4 Network card replacement procedure
Network card (referred to below as NIC) replacement using hot plugging needs specific processing before
and after PCI Express slot power-on or power-off. Its procedure also includes to the common PCI Express
card replacement procedure.
The procedure describes operations where a single NIC is configured as one interface. It also describes
cases where multiple NICs are bonded together to configure one interface (bonding configuration). For
bonding multiple NIC by using PRIMECLUSTER Global Link Services (GLS), see ‘PRIMECLUSTER Global
Link Service Configuration and Administration Guide Redundant Line Control Function for Linux’ (J2UZ-7781).
FIGURE 4.2 Single NIC interface and bonding configuration interface
NIC replacement procedure
This section describes the procedure for NIC replacement.
Notes
- When replacing multiple NICs, be sure to replace them one by one. If you replace multiple cards at the
same time, they may not be correctly configured.
- To perform hot replacement in a system where a bonding device is installed, design the system so that it
specifies ONBOOT=YES in all interface configuration files (the /etc/sysconfig/network-scripts/ifcfg-
eth*files and the /etc/sysconfig/network-scripts/ifcfg-bond*files), regardless of whether the NIC to be
replaced is a configuration interface of the bonding device.
An IP address does not need to be assigned to unused interfaces. This procedure is for preventing the device
name of the replacement target NIC from being changed after hot replacement. If ONBOOT=NO also exists,
the procedure described here may not work properly.
1. Confirm the slot number of the PCI Express slot that has the mounted interface.
Confirm the interface mounting location through the configuration file information and the operating