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HP Hitachi Dynamic Link Manager Software User Manual

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4. HDLM Operation

290

Environment.

2.

Change the path configuration.

3.

Return to the HDLM boot disk environment, following the procedure described

in 3.6 Configuring a Boot Disk Environment.

(5) Dynamic Reconfiguration (DR) for Solaris

You cannot use the Solaris dynamic reconfiguration (DR) function on HBAs that exist

on a path managed by HDLM. To add, delete, or replace such HBAs, you need to

perform a reconfiguration reboot of the host.

4.5.2 Overview of Reconfiguring the HDLM Device

Whether or not the host must be restarted after the reconfiguration depends on the

contents of the reconfiguration. This section describes the reconfigurations that does

and does not require the restarting of the host. It also gives notes for reconfiguration.

(1) Reconfiguring the HDLM Device

You can change the HDLM device configuration in one of the following two ways:

Restart the host, with the reconfiguration option specified.

Execute the

dlmsetconf

utility for creating the HDLM driver configuration

definition file to update the HDLM driver configuration definition file (

/

kernel/drv/dlmfdrv.conf

), and then restart the host, with the

reconfiguration option specified.

Use the

dlmcfgmgr

utility for managing the HDLM configuration, without

restarting the host.
Execute the

dlmsetconf

utility to update the HDLM driver configuration

definition file (

/kernel/drv/dlmfdrv.conf

), and then execute the

dlmcfgmgr

utility.

Modifying the configuration of the HDLM device without restarting the host while

HDLM is running is called a dynamic reconfiguration of the HDLM device.
Dynamic reconfiguration of the HDLM device is applicable to the following

operations:

Adding a new logical unit (LU)

A new LU is one that has been added to the host, and recognized by the HDLM

driver for the first time. When a new LU is added, the path connected to that LU

is also added.

Deleting an existing LU

In Solaris 10, if an LU that is managed by HDLM is deleted, it is also removed

from HDLM management.