Chapter 4 Changing the Multipath Configuration (FC/FCoE Connection for RHEL-AS4, RHEL-ES4, RHEL5, SLES9, or SLES10)
4.2 Storage System and LU Reduction
FUJITSU Storage ETERNUS Multipath Driver V2 User’s Guide for Linux
Copyright 2014 FUJITSU LIMITED
P2U3-0031-15ENZ0
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3
If a storage system is removed and the recognition order function is being used, execute the
"mpdconfig -s" command to reconfigure the recognition order.
[Example]
However, if the storage system reduction reduces the number of storage systems connected to the
server to one or less, execute the "mpdconfig -c" command to clear the recognition order setting
instead.
[Example]
4
Use the "iompadm info" command to check that the removed hardware has disappeared
from view.
[Example]
End of procedure
4.2.2
Reduction with Server Rebooting
Use the following procedure to remove storage systems and LUs while the server is shut down.
Procedure
1
If the storage system recognition order has been set, change the settings before removing
the storage system.
•
When the storage system reduction reduces the number of storage systems connected to the server
to one or less, execute the "mpdconfig -c" command to clear the storage system recognition order.
[Example]
# /opt/FJSVmpd/bin/mpdconfig -s
# /opt/FJSVmpd/bin/mpdconfig -c
# /opt/FJSVmpd/bin/iompadm info
If SCSI disks are accessed using sd* device name, the deleted LUs will cause the device names to not
match after the server is restarted. Alter the OS and application settings as necessary.
If by-id names are used, this problem does not occur.
Never attempt to remove LU0.
# /opt/FJSVmpd/bin/mpdconfig -c