Novell LINUX ENTERPRISE SERVER 10 - STORAGE ADMINISTRATION GUIDE 7-2007, Administration Manual

Page: 49 / 108

Managing Multipath I/O for Devices 49
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To avoid scanning and detection problems for multipathed devices:
1 In a terminal console, log in as the
root
user.
2 Open the
/etc/mdadm.conf
file in a text editor, then modify the
Devices
variable to scan
for devices in the
/dev/disk/by-id
directory, as follows:
DEVICE /dev/disk/by-id/*
After you start multipath I/O services, the paths are listed under
/dev/disk/by-id
as these
names are persistent. They are identical to their non-multipathed names.
5.5 Adding multipathd to the Boot Sequence
Use either of the methods in this section to add multipath I/O services (
multipathd
) to the boot
sequence.
Š Section 5.5.1, “YaST,” on page 49
Š
Section 5.5.2, “Command Line,” on page 49
5.5.1 YaST
1 In YaST, click System > System Services (Runlevel) > Simple Mode .
2
Select multipathd , then click Enable .
3 Click OK to acknowledge the service startup message.
4
Click Finish , then click Yes .
The changes do not take affect until the server is restarted.
5.5.2 Command Line
1 Open a terminal console, then log in as the
root
user or equivalent.
2 At the terminal console prompt, enter
insserv boot.multipath multipathd
5.6 Enabling and Starting Multipath I/O Services
To start multipath services and enable them to start at reboot:
1 Open a terminal console, then log in as the
root
user or equivalent.
2
At the terminal console prompt, enter
chkconfig multipathd on
chkconfig boot.multipath on
If the boot.multipath service does not start automatically on system boot, do the following:
1
Open a terminal console, then log in as the
root
user or equivalent.
2 Enter
/etc/init.d/boot.multipath start
/etc/init.d/multipathd start