HP XP Racks - Manual (Page 143)

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 view
(Displays Information) on page 6-34 .
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:
a
.
Execute the following command:
# lsdev -Cc disk > redirect-destination-file-2
b
.
Open both redirect-destination-file-1 and redirect-destination-file-2.
c
.
Make sure that all hdisk name displayed in the HDevName column in
redirect-destination-file-1 are the same with hdisk name displayed on
the Hitachi Disk Array (Fibre) row in redirect-destination-file-2.
Creating an HDLM Environment
3-77
Hitachi Dynamic Link Manager (for AIX) User Guide