Appendix B - Multipath Configuration
56 Violin 6000 Series Memory Array Installation Guide 535-0045-00 Rev 02
Multipath Setup
This section covers setting up and configuring DM Multipath on the client side for use with Violin
Memory Gateway provided LUNs.
Prerequisites
Before you begin setting up DM Multipath, do the following:
1. Verify that the device-mapper-multipath rpm is installed, as shown in the following
example.
Note: The name of the package and the version shown may vary depending on your Linux
distribution and version.
2. Make a copy of the original multipath.conf file. This ensures that you have the original file
as backup, should an unexpected problem arise.
Note: The multipath package includes a file showing the default values that you can also use as
a customization template, as well as a couple of other helpful files. Go to the
/usr/share/doc/device-mapper-multipath-0.4.7/ directory to access these files:
• multipath.conf.defaults
• multipath.conf.annotated
• multipath.conf.synthetic
Also see the man page for details on the available multipath.conf options.
Setting Up DM Multipath
This section shows you how to edit the multipath.conf file (the configuration file for
multipathd) then configure the multipath daemon to start when the system boots up. DM
Multipath default settings are suitable for common multipath configurations.
Setting up DM Multipath includes the following tasks:
1. Editing the multipath.conf File on page 57
2. Configuring the Multipath Daemon on page 59
[root@redhat123 ~]# rpm -qa | grep multipath
device-mapper-multipath-0.4.7-23.el5_3.1
cp multipath.conf multipath.conf.bak
man multipath.conf
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