3.4.0 Matrix Server Administration Guide

Chapter 17: SAN Maintenance 200

Change the Fencing Method

To change the fencing method, complete these steps:

1. Stop Matrix Server on all servers in the matrix.

2. Open the PolyServe Management Console Login window, enter the

button on the Login window.

3. On the Configure Matrix window, select the Fencing tab and then

configure the appropriate fencing method. See Chapter 2 in the

PolyServe Matrix Server Installation Guide for more information about

this tab.

4. Click Apply (on the bottom of the Configure Matrix window) to install

the new configuration on the server and answer Yes when you are

asked if you want to start the matrix service.

5. Go to the Matrix Wide Configuration tab and export the new

configuration to the other servers.

6. Start Matrix Server on the remaining servers.

Server Cannot Be Fenced

The following command can be used in situations where Matrix Server is

unable to fence a server that is not communicating with the matrix (for

example, because the server has crashed) and you cannot reboot the

server.

mx server markdown <server>

The command informs Matrix Server that the server has been verified to

be down and does not need to be fenced, as it cannot threaten filesystem

integrity.

When Matrix Server cannot fence a server, an alert such as the following

will be displayed:

Reboot <server> ASAP as it stopped matrix network

communication at date/time but attempts to exclude it

from the SAN were unsuccessful!

Rebooting it will allow normal matrix operation to continue.