Hitachi Dynamic Link Manager Software Users Guide for AIX (6.6) (T5208-96010, April 2011)

A. Functional Differences Between Versions of HDLM
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A. Functional Differences Between Versions of HDLM
This section explains the functional differences between newer and older versions of
HDLM.
A.1 Functional Differences Between Version 6.2 and Versions Earlier
than 6.2
 In HDLM version 6.1.0 or earlier, when you create a system replication (clone)
on another LPAR or host from an mksysb image by using the
mksysb command
provided by the OS, you needed to uninstall HDLM before executing the
mksysb
command.
In HDLM version 6.2.0 or later, you do not need to uninstall HDLM before
executing the
mksysb command. You can now execute the HDLM restoration
support utility (
dlmpostrestore) after creating a system replication, so that
HDLM information can now be updated according to the destination system's
environment.
 For HDLM 6.1.0 or earlier, a physical volume (hdisk) might have been changed
during an unattended upgrade installation or re-installation of HDLM. For HDLM
6.2.0, a physical volume (hdisk) is not changed during an upgrade installation or
re-installation of HDLM.
A.2 Functional Differences Between Version 6.1 and Versions Earlier
than 6.1
 In a new installation of HDLM, the default load balancing algorithm has been
changed from the Round Robin algorithm to the Extended Least I/Os algorithm.
A.3 Functional Differences Between Version 6.0 or Later and
Versions Earlier than 6.0
 The HDLM installation function provided by the dlmsetup utility for HDLM
installation configuration support has been integrated into the
installhdlm
utility for HDLM installation.
 The way the HDLM version is displayed in execution results of HDLM
commands or utilities has been changed.
 In a new installation of HDLM, the default value for the automatic failback
function has been changed from
off to on.