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

Chapter 6 Changing the Multipath Configuration (iSCSI Connection for RHEL5, SLES9, or SLES10)

6.6 Path Reduction (Cable Reduction)

6.6 Path Reduction (Cable Reduction)
This section describes how to decrease the paths by removing cables.
6.6.1

Reduction without Server Rebooting

Cables can be removed without shutting down the server. Use the following procedure.
SUSE Linux Enterprise Server 9 requires the server be rebooted for cable reduction.
Procedure
1
Disconnect the surplus cables from the server.
Disconnect the cables after logging out of the iSCSI target.
2
Use the "iompadm info" command to check that the removed cable is displayed as "fail".
[Example]
# /opt/FJSVmpd/bin/iompadm info
3
Delete the removed cable from the Multipath Driver target list using the "mpdconfig -d"
command.
[Example]
# /opt/FJSVmpd/bin/mpdconfig -d
4
Use the "iompadm info" command to check that the removed cable has disappeared from
view.
[Example]
# /opt/FJSVmpd/bin/iompadm info
5
Reset the Max Throttle value if necessary.
When the number of paths connected to a given 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.
6
Set the iSCSI service and delete the iSCSI target information of the removed path.
FUJITSU Storage ETERNUS Multipath Driver V2 User's Guide for Linux
Copyright 2014 FUJITSU LIMITED
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End of procedure
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