You can enable the system to support multipathing for Linux
hosts.
The Lenovo Storage V7000 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 Lenovo Storage V7000 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 described in Settings for Linux hosts
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 more 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