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How to Replace the Motherboard or Service Processor in a Logical Domain (LDom) Environment (Doc ID 1019720.1)

Last updated on JUNE 13, 2024

Applies to:

SPARC M7-16 - Version All Versions and later
SPARC S7-2L - Version All Versions and later
SPARC M8-8 - Version All Versions and later
SPARC T4-1 - Version All Versions and later
SPARC T7-1 - Version All Versions and later
Oracle Solaris on SPARC (64-bit)

Goal

This document details how to backup and recover the Oracle VM for SPARC (aka LDom) environment following the replacement of the service processor or motherboard in a CMT capable system.

Depending on platform type the LDom configuration is stored within the Service Processor or Motherboard/Main Module - when these components are replaced the LDom configuration will be lost;

[T1000, T2000, Netra T2000]

Stored within the /persist filesystem residing on the Service Processor

[T5x20, T5x40, Sun Blade T63x0, Netra T5xx0]

Stored within Host Data Flash embedded on the Service Processor

[T3-1, T3-2, T3-1B, Netra T3-1, T4-1, T4-2, T4-1B, Netra T4-x, T5-2, T5-1B]

Stored within Host data Flash embedded on the System Board

[T3-4, T4-4, T5-4, T5-8 S7-2, S7-2L, T7-1, T7-2, T7-4]

Stored within Host Data Flash embedded on the Main Module (Motherboard).

This procedure explains the steps needed to recover the Logical Domains in a basic LDom configuration. It does not include procedures for recovery of Solaris ZFS or Veritas Storage management.

Sometimes it is not possible to save the LDom configuration prior to the System Board, Main Module or SP replacement. Refer to doc 1464421.1 for the steps on How-To restore LDom config after loss of (or not saved) configuration.

Please note:

From Oracle VM for SPARC 3.0 onwards the 'Primary' LDom configuration is saved to the Solaris host (/var/opt/SUNWldm/bootsets) in addition to Host Data Flash. On SPARC T5 and newer, in the event of losing host data flash (such as following a Motherboard or Main Module replacement) the configs stored in /var/opt/SUNWldm/bootsets will be copied back via the SP by ldmd once services start during host initialization.
Once ldmd has copied the configs of /var/opt/SUNWldm/bootsets back to the SP, the most recent config needs to be selected by "ldm set-spconfig {configname}", followed by a powercycle of the system
to activate the desired bootset/config.

 

Caution  - Always save your stable configuration to the SP and save it as XML.

 

As an alternative way to Back Up and Restore the LDom configuration, you may consider to use the references below for SP backup and restore instructions:

References, ILOM 3.2 and 4.x SP backup and restore instructions:
https://docs.oracle.com/cd/E37444_01/html/E37446/z40048b81489311.html#scrolltoc
https://docs.oracle.com/cd/E81115_01/html/E86149/z40048b81489311.html#scrolltoc


An example of this procedure can be found in section 'Procedure to Back Up and Restore the Oracle ILOM Configuration Settings'
of <Document 1464421.1> Configuration, Save & Restore Setup and Troubleshooting of Oracle VM Server for SPARC (LDom)

 

 

Solution

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