Adding Multipathd To The Boot Sequence; Yast; Command Line; Starting Multipath I/O Services - Novell LINUX ENTERPRISE SERVER 10 - STORAGE ADMINISTRATION GUIDE FOR EVMS Administration Manual

5.3 Adding multipathd to the Boot Sequence

If you are using multipath IO services, add multipathd the boot sequence, using one of the
following methods:

5.3.1 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.

5.3.2 Command Line

1 Open a terminal console, then log in as the root user or equivalent.
2 At the terminal console prompt, enter

5.4 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
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

5.5 Configuring Time-Out Settings for the HBA

When using multipath I/O, you want any host bus adapter (HBA) or cable failures to be reported
faster than when single paths are used, so that multipathing can fail over to the healthy path.
Configure time-out settings for your HBA to opt for failover sooner by modifying its options in the
/etc/modprobe.conf.local file.
For example, for the QLogic 2xxx family of host bus adapters, the following setting are
recommended:
options qla2xxx qlport_down_retry=1 ql2xretrycount=5
46 SLES 10 Storage Administration Guide for EVMS
Section 5.3.1, "YaST," on page 46
Section 5.3.2, "Command Line," on page 46
The changes do not take affect until the server is restarted.
insserv boot.multipath multipathd
chkconfig multipathd on
chkconfig boot.multipath on
/etc/init.d/boot.multipath start
/etc/init.d/multipathd start