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

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B. Differences Between HDLM Version 5.9 or Later and Version 5.8.1 or Earlier

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• Settings when GPFS is used

• Replacement of HBA

• Changing HDLM management-target devices

• Replacement of fiber cables

• Replacement of fibre channel switches

An update installation refers to upgrading HDLM whose version is 5.9 or

later. Therefore, it does not include a migration from HDLM version 5.8.1 or

earlier to HDLM version 5.9 or later. It also does not include a migration

from HDLM version 5.9 or later to HDLM version 5.8.1 or earlier. For such

installations, you must first uninstall the existing HDLM and then install

HDLM version 5.9 or later. To migrate from HDLM version 5.8.1 or earlier

to HDLM version 5.9 or later, you can use the

dlmmigsts utility for

assisting HDLM transitions to inherit the existing HDLM settings. For

details, see 3.5.6 Migrating from HDLM Version 5.8.1 or Earlier to Version

5.9 or Later.

B.4 Migrating Reservation Control Settings

In HDLM version 5.8.1 or earlier, the reservation control setting is called the

reservation level and is specified by using the

set operation with the -rsv on

parameter. The target of the reservation level was every LU in an HDLM

management-target device. However, you can set the reservation policy specification

on each LU if the AIX version is AIX 5L V5.2 or later. The reservation control setting

is specified by using the

chdev command in HDLM version 5.9 or later. Therefore,

the

-rsv on parameter for the set operation is no longer provided.

Table B-2: The correspondence of the setting values between the reservation level

and reservation policy shows the correspondence of the setting values between the

reservation level and the reservation policy.

Table B-2: The correspondence of the setting values between the reservation

level and reservation policy

B.5 Support for a Boot Disk Environment

A storage system disk can now be used for the boot disk. Accompanying this, the

dlmpreuninst utility that is executed before uninstalling HDLM has been provided.

Reservation Level Reservation Policy

0: Ignoring the reservation no_reserve

: Persistent reservation PR_exclusive