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3. Creating an HDLM Environment
187
3.9 Checking the Path Configuration
HDLM functions, such as load balancing and failover, are only available for HDLM
management-target devices that have more than one active path. After you install
HDLM or change the hardware configuration, check the structure and statuses of the
paths.
To check the path information, use the HDLM command's
view operation.
The following describes how to check path information by using the
dlnkmgr
command's
view operation. For details about the view operation, see 6.7 view
(Displays Information).
Specify the
-path parameter and check the output information:
Execute the following command:
# /opt/DynamicLinkManager/bin/dlnkmgr view -path >
redirect-destination-file-1
Open redirect-destination-file-1 and check the following:
Make sure that there is at least one LU being accessed by a path.
A path can be identified by
PathName. The LU that is accessed by a path can
be identified by both
DskName and iLU.
Make sure that all the paths are online.
Make sure that
PathStatus is Online. If a path is not online, Reduced
will be displayed.
Make sure that there are enough host-port-number
.bus-number
combinations for the number of physical HBA ports.
Make sure that for each path the combination of the CHA port (
ChaPort),
through which multiple paths are accessing the same LU, and the HBA port
(the host port number and bus number displayed in the
PathName column)
is different.
The digits displayed on the left of
PathName indicate a host port number.
The numbers displayed between the period to the right of the host port
number and the next period indicate a bus number.
Specify the
-drv parameter and check the output information:
Execute the following command:
# /opt/DynamicLinkManager/bin/dlnkmgr view -drv >
redirect-destination-file-2
Open redirect-destination-file-2 and check the
HDevName and Device entries,
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