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B. functional differences between versions of hdlm – HP Hitachi Dynamic Link Manager Software User Manual

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B. Functional Differences Between Versions of HDLM

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B. Functional Differences Between Versions of HDLM

This section explains the functional differences between newer and older versions of

HDLM.

B.1 Functional Differences Between Version 6.1 or Later 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.

B.2 Functional Differences Between Version 6.0 or Later and

Versions Earlier Than 6.0

The format of the displayed HDLM version has been changed when HDLM

commands or utilities are executed.

In a new installation of HDLM, the default value for the automatic failback

function has been changed from

off

to

on

.

B.3 Precautions on Differences in Functionality Between HDLM

5.6.1 or Earlier and HDLM 5.6.2 or Later

For HDLM version 5.6.1 or earlier and version 5.6.2 or later, when one of the

following commands is executed for LDEV created on SVS, the output LDEV display

names will be different.
Table B-1: Differences in LDEV Display Names Between Versions shows the

commands that output different LDEV display names and the actual output display

names.

Table B-1: Differences in LDEV Display Names Between Versions

HDLM version

Operations of the dlnkmgr

command

Output LDEV display name

5.6.1 or earlier

dlnkmgr view -path

dlnkmgr view -drv

dlnkmgr view -lu

XP

5.6.2 or later

SVS