46
SLES 10 Storage Administration Guide for EVMS
no
vd
ocx (
E
NU)
9
Jan
uar
y 2
007
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:
Section 5.3.1, “YaST,” on page 46
Section 5.3.2, “Command Line,” on page 46
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
.
The changes do not take affect until the server is restarted.
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
insserv boot.multipath multipathd
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
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
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
Summary of Contents for LINUX ENTERPRISE SERVER 10 - STORAGE ADMINISTRATION GUIDE FOR EVMS
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