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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
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