Settings For Vcs; Checking The Path Configuration - Hitachi XP P9500 User Manual

Settings for VCS

The following is the procedure that must be executed by the user when HDLM
is installed in an environment that uses VCS. For details on how to operate
the VCS GUI, see the VCS documentation.
1 Stop the cluster service of VCS.
.
2 Change the SCSI device used by VCS to an HDLM device.
.
Change the Block Devices parameter of the Mount resource from the
SCSI device to an HDLM device.
3 Start the cluster service of VCS.
.

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
(Displays Information) on page
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:
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Specify the -drv parameter and check the output information:
Execute the following command:
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 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.
Make sure that there are different host port numbers and bus
numbers for each physical HBA port.
Creating an HDLM Environment
Hitachi Dynamic Link Manager User Guide (for Linux(R))
6-28.
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