Chapter 9 Changing the Multipath Configuration (iSCSI Connection for RHEL6, RHEL7, or SLES11)
9.7 Path Addition and Reduction (NIC Addition and Reduction)
FUJITSU Storage ETERNUS Multipath Driver V2 User’s Guide for Linux
Copyright 2014 FUJITSU LIMITED
P2U3-0031-15ENZ0
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9.6.2
Reduction with Server Rebooting
Use the following procedure to remove cables while the server is shut down:
Procedure
1
Shut down the server.
2
Detach the hardware.
Disconnect the target cable from the server (remove the connected cable, etc.).
3
Restart the server.
Power on the server and boot it up.
4
Use the "iompadm info" command to check the result.
When the cables are disconnected, they should be automatically removed and disappeared from the
list.
[Example]
5
Delete the removed cable from the Multipath Driver target list using the "mpdconfig -d"
command.
[Example]
6
Reset the Max Throttle value if necessary.
When the number of paths connected to a given CA port in the storage system is reduced due to the
path removal, execute the "mpdconfig -m" command to set the Max Throttle value correctly.
Refer to the software information (/opt/FJSVmpd/manual/english/readme.pdf) for the Max Throttle
value computation method.
7
Set the iSCSI service and delete the iSCSI target information of the removed path.
End of procedure
9.7
Path Addition and Reduction (NIC Addition and Reduction)
This section describes how to increase paths by adding NICs, and decrease paths by removing NICs.
Adding and reducing NICs without server rebooting (PCI Hot Plug) is only supported for PRIMEQUEST servers.
Adding and reducing NICs without server rebooting is the same procedure as adding and reducing cables
without server rebooting. Add or reduce NICs at the same time that cables are being added or reduced. For
details on this procedure, refer to the PRIMEQUEST manual.
Adding and reducing NICs with server rebooting is the same procedure as adding and reducing cables with
server rebooting. Add or reduce NICs at the same time that cables are being added or reduced.
# /opt/FJSVmpd/bin/iompadm info
# /opt/FJSVmpd/bin/mpdconfig -d
