Installation guide

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 2.5.1, “Disabling ACPI Soft-Off with chkco nfi g Management” — Preferred method

Section 2.5.2, “ Disabling ACPI Soft-Off with the BIOS” — First alternate method

Section 2.5.3, “ Disabling ACPI Completely in the g rub. co nf File” — Second alternate method

2.5.1. Disabling ACPI Soft -Off with chkco nfi g Management

You can use chkco nfi g management to disable ACPI Soft-Off either by removing the ACPI daemon

(acpi d ) from chkconfi g management or by turning off acpid .

Note

This is the preferred method of disabling ACPI Soft-Off.

Disable ACPI Soft-Off with chkco nfi g management at each cluster node as follows:

1. Run either of the following commands:

chkco nfi g --d el acpi d — This command removes acpid from chkconfi g

management.

— OR —

chkco nfi g --l evel 34 5 acpid o ff — 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.

Note

You can fence the node with the fence_no d e command or Co n g a.

2.5.2. Disabling ACPI Soft -Off with t he BIOS

The preferred method of disabling ACPI Soft-Off is with chkco nfi g management (Section 2.5.1,

“ Disabling ACPI Soft-Off with chkconfi g Management” ). However, if the preferred method is not

effective for your cluster, follow the procedure in this section.

Red Hat Ent erprise Linux 6 Clust er Administ rat ion