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1 precautions – HP Hitachi Dynamic Link Manager Software User Manual

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3. Creating an HDLM Environment

165

3.8 Configuring a Mirrored Boot Disk Environment Incorporating

SVM

A mirrored boot disk incorporating SVM can be managed by HDLM.
The following configuration is supported:

OS: Solaris 10
RAID level: Mirroring (no more than three mirrors)
Cluster: None

3.8.1 Precautions

„

When you use the

dlmsetconf

utility, do not specify the

-r

option. If the -r

option is specified, the instance number (the minor number of the HDLM device)

is changed, and the metadevice can no longer be used.

„

After 3.8.3 Placing the Boot Disks Under HDLM Management by Installing

HDLM to a Mirrored Boot Disk Environment Incorporating SVM is performed,

the boot disk in the pre-migration environment cannot be used.

„

After 3.8.4 Uninstalling HDLM in this document is performed, the boot disk in

the pre-migration environment cannot be used.

„

When maintaining the device that the path of the boot disk environment uses

while using Solaris, note the following:

Ensure that at least one path connected to the boot disk is online when you

perform a maintenance task.

Before starting maintenance, for any path that you expect to be disconnected

during the maintenance operation, execute the

dlnkmgr

command with the

offline

option to set the path to the Offline(C) status.

If you do not change the status and a path disconnection is detected during the

maintenance, access to the boot disk will be temporarily delayed. As a result, the

system performance might decrease. After you finish maintenance, immediately

execute the

dlnkmgr

command with the

online

option to set the paths (that you

set to Offline(C)) to Online.

„

For details about the action to take if there is a path error in the boot disk

environment, see 5.4 Actions to Take for a Path Error in a Boot Disk

Environment.

„

In the boot disk environment, Solaris cannot be upgraded. If Solaris needs to be

upgraded, perform the following:
1.

Uninstall HDLM after migration to a local boot disk environment by