Chapter 7 Changing the Multipath Configuration (FC/FCoE Connection for RHEL6, RHEL7, or SLES11)
7.3 LU Addition
FUJITSU Storage ETERNUS Multipath Driver V2 User’s Guide for Linux
Copyright 2014 FUJITSU LIMITED
P2U3-0031-15ENZ0
86
7.3
LU Addition
7.3.1
Addition without Server Rebooting
Using the "mpdconfig" command, extra LUs can be added without shutting down the server. Use the following
procedure.
Procedure
1
Attach the LU.
Add a LU in the storage system. For details on adding LUs, refer to the storage system manual.
2
Incorporate the new LU using the "mpdconfig -a" command.
[Example]
The "iompadm rescan" command can also be used to incorporate the new LU.
[Example]
3
Use the "iompadm info" command to check that the added LU has been correctly recognized
and incorporated.
[Example]
End of procedure
# /opt/FJSVmpd/bin/mpdconfig -a
# /opt/FJSVmpd/bin/iompadm rescan
# /opt/FJSVmpd/bin/iompadm info
When a LU is added, it is initially added as a new SCSI disk device after the LUs that have already been
incorporated.
However, after the system is restarted, the newly added LU is incorporated into the system according
to the storage system LU number.
Therefore, to access the SCSI disk via a sd* device name, add the LU so that it has the same device
name before and after the system restart.
If by-id names are used, this problem does not occur.
