Path Reduction (Cable Reduction); Reduction Without Server Rebooting - Fujitsu ETERNUS Multipath Driver V2 User Manual

Chapter 7 Changing the Multipath Configuration (FC/FCoE Connection for RHEL6, RHEL7, or SLES11)

7.6 Path Reduction (Cable Reduction)

2
Attach the hardware.
Set up the storage system so that its LUs are accessible via the cable, and then connect the cable
between the server and the storage system (an HBA must already be installed in the server). For details
on the settings, refer to the storage system manual.
3
Restart the server.
Power on the server and boot it up.
4
Use the "iompadm info" command to check that the new cable has been correctly
recognized and incorporated.
[Example]
# /opt/FJSVmpd/bin/iompadm info
5
Set a Max Throttle value for the new path.
Execute the "mpdconfig -m" command to set a Max Throttle value for the new path. Refer to the
software information (/opt/FJSVmpd/manual/english/readme.pdf) for the Max Throttle value
computation method.
[Example]
# /opt/FJSVmpd/bin/mpdconfig -m
7.6 Path Reduction (Cable Reduction)
This section describes how to decrease the paths by removing cables.
7.6.1

Reduction without Server Rebooting

Using the "mpdconfig" command, cables can be removed without shutting down the server. Use the following
procedure.
Procedure
1
Detach the hardware.
Disconnect the target cable from the server (remove the connected cable, etc.).
2
Delete the removed cable from the Multipath Driver target list using the "mpdconfig -d"
command.
[Example]
# /opt/FJSVmpd/bin/mpdconfig -d
FUJITSU Storage ETERNUS Multipath Driver V2 User's Guide for Linux
Copyright 2014 FUJITSU LIMITED
91
End of procedure
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