You can enable the system to support multipathing for Linux hosts.
The system supports the Linux
device-mapper multipathing driver for the iSCSI host attachment. After the iSCSI devices are
discovered, you can enable multipathing.
To enable multipathing for a Linux
host, complete the following steps:
- If the daemon is already running, stop the multipathing daemon with the service
multipathd stop command.
- Add the entry for the system by editing the multipath configuration file,
/etc/multipath.conf.In the DMMP configuration file, /etc/multipath.conf, ensure that
the default settings include the values that are described in svc_linux_settings.html#svc_linux_settings.
Note: Prevent blacklisting of the IBM2145 devices by either disabling blacklisting of devices entirely or by adding an
appropriate entry in the blacklist_exceptions section.
- Save the file.
- Restart the multipathing daemon with the service
multipathd start command.
If you are using SUSE Linux Enterprise Server 10 Service
Pack 2 or later, replace the line prio "/sbin/mpath_prio/alua /dev/%n"
with prio "alua" to disable the Using deprecated
prio message.
Note: Linux usually enables multipathing automatically.
However, in some cases such as the RH 6.3 SAN
boot installation, the multipathing is not configured properly. If this situation occurs, you must manually edit the
/etc/multipath.conf file. For information about DM-multipath, see the Linux
Storage
Administration Guide or
DM-Multipathing Installation
and Configuration Guide for your kernel from the Linux provider.
For more information about Linux system configuration, see the following
website:
http://www.ibm.com/support/knowledgecenter/linuxonibm/liaab/ic-homepage.htm