HP Hitachi Dynamic Link Manager Software Licenses - Manual (Page 205)

Remove HDLM by referring to Removing HDLM on page 3-184 .
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 view
(Displays Information) on page 6-34 .
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, making sure that an HDLM device corresponding to the sd or ssd
device has been created.
Creating an HDLM Environment
3-139
Hitachi Dynamic Link Manager (for Solaris) User Guide