Hitachi Dynamic Link Manager Software Users Guide for AIX (6.6) (T5208-96010, April 2011)

3. Creating an HDLM Environment
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3.6 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
dlnkmgr 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:
# /usr/DynamicLinkManager/bin/dlnkmgr view -path >
redirect-destination-file-1
Open redirect-destination-file-1 and check the following:
• Make sure that an LU accessed by a path exists.
A path can be identified with
PathName. The LU that is accessed by a path can be
identified with a combination of
DskName and iLU.
• Make sure that all paths are online.
Make sure that
PathStatus is Online. If there is a path whose status is not
online,
Reduced will be displayed.
• Make sure that the combinations of the CHA port (
ChaPort), through which
paths access the same LU, and the HBA port (the HBA adapter number and bus
number or the adapter type and adapter number displayed in the
PathName
column) are different.
The digits displayed on the left of
PathName indicate an HBA adapter number or
adapter type. The numbers displayed between the period to the right of the HBA
adapter number and the next period indicate a bus number or adapter number.
• Make sure that different HBA adapter numbers and bus numbers (or different
adapter types and adapter numbers) exist for the number of the physical HBA
ports.
To make sure that the OS and HDLM recognize the same HDLM management-target
device:
1. Execute the following command: