HP 3PAR RedHat and Oracle Linux Implementation Guide

Figure 15 Multipath Devices
For more information, see the RedHat Enterprise Linux 6 Storage Administration Guide, available
at the following website:
Red Hat
Configuring RHEL 6 or RHEL 5 iSCSI Settings with Device-mapper Multipathing
The /etc/multipath.conf file is used by Device-mapper where the multipathing parameters
have been set. The default installed /etc/multipath.conf file must be edited with the following
changes for a minimum configuration connecting to an HP 3PAR array. Entries listed in
multipath.conf override the default kernel parameters for dm-multipath. In general, the
kernel defaults are sufficient with the exception of the devices entries for HP 3PAR.
NOTE: See RHEL documentation of DM Multipath Configuration and Administration for additional
options in multipath.conf entries.
1. Remove or comment out all entries in the /etc/multipath.conf file except for the devices
section of devices currently in use.
2. Edit the devices structure to add entries for HP 3PAR StoreServ Storage array and remove
other product entries that are not needed.
For RHEL 6.2 or later
# cat /etc/multipath.conf
defaults {
74 Configuring a Host with iSCSI