HP XP Racks - Manual (Page 84)

• If you are using PowerHA, note that HDLM does not support non-
concurrent volume groups due to limitations in PowerHA. For details,
contact IBM.
• If all of the following conditions are met, HDLM can be migrated without
stopping PowerHA services:
¢
The shared volume groups used by PowerHA are concurrent volume
groups.
¢
A custom disk method is specified in the PowerHA script.
¢
A virtual I/O server environment is not used on the host.
Notes on the Automatic Failback
If the automatic failback processing starts before a path failure has been
recovered from, the cluster system switchover time might become longer. To
prevent this, for the automatic failback checking interval, specify a value that
is greater than the value obtained from the following formula:
checking-interval (minutes)
= maximum-number-of-paths-among-the-LUs × number-of-connected-
storage-devices
Notes on the queue_depth Parameter Value for an HDLM-Managed
device
Hitachi recommends that you set the queue_depth parameter of an hdisk for
an HDLM-managed device to a value greater than or equal to the number of
paths that are connected to the hdisk. For details on how to specify the
queue_depth parameter, see the AIX documentation.
Installing HDLM
When you install HDLM, Hitachi Network Objectplaza Trace Library will also be
installed. The file path of the integrated trace information file of Hitachi
Network Objectplaza Trace Library is /var/opt/hitachi/HNTRLib2/spool/
hntr2n.log, where n is the number of the integrated trace information file.
Available Installation Methods
To install HDLM, use one of the following procedures:
• Use installux.sh.
By using installux.sh, you can install HDLM from the DVD-ROM or the
directory to which the contents of the DVD-ROM have been copied
without needing to consider the location in which the files to be installed
are stored. You can use the installux.sh command to perform the
following installations:
¢
New installation
3-18
Creating an HDLM Environment
Hitachi Dynamic Link Manager (for AIX) User Guide