Installation guide

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 2.4.1, “ D isabling ACPI Soft-Off with chkconfig Management” — Preferred method

Section 2.4.2, “ D isabling ACPI Soft-Off with the BIOS” — First alternate method

Section 2.4.3, “ D isabling ACPI Completely in the grub.conf File” — Second alternate method

2.4 .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:

chkconfig --del acpid — This command removes acpid from chkconfig

management.

— OR —

chkconfig --level 2345 acpid off — This command turns off acpid.

2. Reboot the node.

3. When the cluster is configured and running, verify that the node turns off immediately when

fenced.

⁠Chapt er 2 . Before Config uring a Red Hat Clust er