HP XP Racks - Manual (Page 83)

Trace files after the migration: /var/DynamicLinkManager/log/
hdlmtrn.log (n indicates a file number)
Notes on Storage Systems
• Do not change the vendor ID or product ID of a storage system. If you
do, HDLM will not be able to recognize the storage system.
• Before you connect multiple storage systems to the same host, make sure
that the storage systems have unique serial numbers. If there is a
duplication of serial numbers, use a tool such as Disk Array Management
Program to assign a unique serial number to each device.
• If you restart a storage system when using an hdisk that meets both of
the following conditions, the persistent reservation of the LU registered in
this volume group will be cancelled:
¢
The reserve_policy attribute has been set to PR_exclusive.
¢
The volume group has been activated.
Perform the procedure below to inactivate the volume group, and then re-
activate it. Also, when you perform a planned restart of a storage system,
make sure you perform the operation while the volume group is inactive.
a
.
Execute the following command to inactivate the volume group:
# varyoffvg volume-group-name
b
.
Execute the following command to make sure that the inactivated
volume group is no longer displayed:
# lsvg -o
c
.
Execute the following command to activate the volume group:
# varyonvg volume-group-name
Notes on the Cluster
• When you use HDLM in a cluster configuration, you must install the same
version of HDLM on all the nodes that comprise the cluster. If different
versions of HDLM are installed, the cluster system may not operate
correctly. If the HDLM Version and Service Pack Version, which are
displayed by executing the following command, are the same, the
versions of HDLM are the same:
# /usr/DynamicLinkManager/bin/dlnkmgr view -sys
• When you use PowerHA, GPFS, Oracle RAC 10g, Oracle RAC 11g, or VCS,
settings such as script registration or the reservation policy setting are
required. For details about the settings used for each cluster, see the
following:
For PowerHA:
Settings for Using PowerHA on page 3-95 .
For GPFS: Settings for Using GPFS on page 3-97 .
For Oracle RAC 10g or Oracle RAC 11g: Settings for Using Oracle RAC 10g
or Oracle RAC 11g on page 3-98 .
For VCS: Settings for Using VCS on page 3-100 .
Creating an HDLM Environment
3-17
Hitachi Dynamic Link Manager (for AIX) User Guide