PRIMECLUSTER Global Disk Services Configuration and Administration Guide 4.1 (Solaris(TM) Operating System)

A.2.9 System Disk Mirroring

You can mirror the system disk containing the operating root file system by registering the system disk with root class. When registering a system disk, you must specify "keep" for its disk type.

You cannot register system disks with local class and shared class.

When mirroring a system disk, GDS additionally sets the OpenBoot nvramrc parameter. It will also set use-nvramrc? parameter to "true" so that the command registered with NVRAMRC will automatically be executed when booting the system.

However, when a command is already registered with NVRAMRC and use-nvramrc? is set to "false", a following warning message will be displayed, and use-nvramrc?will not be changed to "true."

    WARNING: cannot set use-nvramrc? parameter to true, NVRAMRC not empty

When use-nvramrc? is set to "false", removing the command registered with NVRAMRC is recommended.

When the warning message is displayed, follow the procedures below and set use-nvramrc? to "true."

1. Confirm the contents of NVRAMRC. When the setting is correct, change the use-nvramrc? parameter to "true" with eeprom(1M).

2. If the contents of NVRAMRC are invalid, remove the command registered with NVRAMRC, and reboot the system. use-nvramrc? will be automatically changed to "true."

• How to confirm use-nvramrc? parameter:

  # eeprom use-nvramrc?
  use-nvramrc?=false

  
  

• How to change and confirm use-nvramrc? parameter:

  # eeprom use-nvramrc?=true
  # eeprom use-nvramrc?
  use-nvramrc?=true

  
  

• How to confirm the command registered with NVRAMRC:

  # eeprom nvramrc

  (Registered command will be displayed.)
  

• How to remove and confirm the command registered to NVRAMRC:

  # eeprom nvramrc=
  # eeprom nvramrc
  nvramrc: data not available.

  
  

In the root class, the logical partitioning, disk concatenation, and disk striping functions are not available.