HP Hitachi Dynamic Link Manager Software - Manual (Page 134)

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 or
use the Path List view in the Path Management window of the HDLM GUI.
For details about the Path List view, see the HDLM GUI Help.
The HDLM command's view operation to check path information is described
below. For details about the view operation, see view (Displays Information)
on page 6-29 .
Specify the -path parameter and check the output information:
Execute the following command:
>dlnkmgr view -path > redirect-destination-file
Open redirect-destination-file-1 and check the following:
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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.
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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 number to the left of PathName is the host port number. The
numbers displayed between the period to the right of the host port
number and the following period is the bus number.
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Make sure that there are different host port numbers and bus
numbers for each physical HBA port.
If the system cannot be configured in a multi-path configuration,
perform the following operations:
1
.
From the Device Manager window of Windows, select Disk drives, and
then click Scan for hardware changes.
2
.
From the Disk Management window of Windows, click Rescan Disks.
Setting Up HDLM
HDLM includes functions like the load balancing function, the automatic
failback function, the error logging function, the audit logging function, etc.
You can set up these functions by using the dlnkmgr command's set
3-68
Creating an HDLM Environment
Hitachi Dynamic Link Manager User Guide (for Windows(R))