Installation guide
Soft-Off with one of the following alternate methods:
• Changing the BIOS setting to "instant-off" or an equivalent setting that turns off the node
without delay
Note
Disabling ACPI Soft-Off with the BIOS may not be possible with some
computers.
• Appending acpi=off to the kernel boot command line of the /boot/grub/grub.conf file
Important
This method completely disables ACPI; some computers do not boot correctly if
ACPI is completely disabled. Use this method only if the other methods are not
effective for your cluster.
The following sections provide procedures for the preferred method and alternate methods of
disabling ACPI Soft-Off:
• Section 3.1, “Disabling ACPI Soft-Off with chkconfig Management” — Preferred method
• Section 3.2, “Disabling ACPI Soft-Off with the BIOS” — First alternate method
• Section 3.3, “Disabling ACPI Completely in the grub.conf File” — Second alternate method
3.1. Disabling ACPI Soft-Off with chkconfig Management
You can use chkconfig management to disable ACPI Soft-Off either by removing the ACPI
daemon (acpid) from chkconfig management or by turning off acpid.
Note
This is the preferred method of disabling ACPI Soft-Off.
Disable ACPI Soft-Off with chkconfig management at each cluster node as follows:
1. Run either of the following commands:
Chapter 2. Before Configuring a Red Hat Cluster
18