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

Chapter 5 Changing the Multipath Configuration (SAS Connection for RHEL-AS4, RHEL-ES4, RHEL5, or SLES10)

5.6 Path Reduction (Cable Reduction)

[Example]
# /opt/FJSVmpd/bin/mpdconfig -m
5.5.2

Addition with Server Rebooting

Same as for FC/FCoE connection.
Refer to "4.3.2 Addition with Server Rebooting" (page
5.6 Path Reduction (Cable Reduction)
This section describes how to decrease the paths by removing cables.
5.6.1

Reduction without Server Rebooting

Cables can be removed without shutting down the server. Use the following procedure.
Procedure
1
Disconnect the surplus cables from the server.
2
Use the "iompadm info" command to check the result.
When the cables are disconnected, they should be automatically removed and disappear from the list.
[Example]
# /opt/FJSVmpd/bin/iompadm info
3
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.
5.6.2

Reduction with Server Rebooting

Same as for FC/FCoE connection.
Refer to "4.4.2 Reduction with Server Rebooting" (page
FUJITSU Storage ETERNUS Multipath Driver V2 User's Guide for Linux
Copyright 2014 FUJITSU LIMITED
61).
63).
69
End of procedure
End of procedure
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