Chapter 7 Changing the Multipath Configuration (FC/FCoE Connection for RHEL6, RHEL7, or SLES11)
7.4 LU Reduction
FUJITSU Storage ETERNUS Multipath Driver V2 User’s Guide for Linux
Copyright 2014 FUJITSU LIMITED
P2U3-0031-15ENZ0
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7.4.2
Reduction with Server Rebooting
Use the following procedure to remove LUs while the server is shut down.
Procedure
1
Shut down the server.
2
Remove the LUs.
Perform LU reduction in the storage system (so that the server cannot recognize the LU). Refer to the
storage system manual for LU reduction details.
3
Restart the server.
Power on the server and boot it up.
4
Use the "iompadm info" command to check that the removed LUs are disappeared from
view.
[Example]
End of procedure
For storage systems other than the ETERNUS DX S2 series, ETERNUS DX S3 series, or ETERNUS All Flash Array,
never attempt to remove LU0.
If SCSI disks are accessed using sd* device names, discrepancies will occur for the device names
according to the number of deleted LUs when the server is restarted after deleting LUs. Alter the OS
and application settings as necessary.
If by-id names are used, this problem does not occur.
# /opt/FJSVmpd/bin/iompadm info
