Configuration File Defaults - Red Hat ENTERPRISE LINUX 4 - DM MULTIPATH Manual

The following example shows the lines in the configuration file that would blacklist all SCSI devices,
since it blacklists are sd* devices.
devnode_blacklist {
devnode "^sd[a-z]"
}
You can use a devnode entry in the blacklist section of the configuraion file to specify individual
devices to blacklist rather than all devices of specific type; this is not recommended, however. Unless
it is statically mapped by udev rules, there is no guarantee that a specific device will have the same
name on reboot. For example, a device name could change from /dev/sda to /dev/sdb on reboot.
By default, the following devnode entries are compiled in the default blacklist; the devices that these
entires blacklist do not generally support DM-Multipath.
blacklist {
devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
devnode "^hd[a-z]"
devnode "^cciss!c[0-9]d[0-9]*"
}

4.3. Configuration File Defaults

The /etc/multipath.conf configuration file includes a defaults section that sets the
user_friendly_names parameter to yes, as follows.
defaults {
user_friendly_names yes
}
This overwrites the default value of the user_friendly_names parameter.
The configuration file includes a template of configuration defaults. This section is commented out, as
follows.
#defaults {
# udev_dir
# polling_interval
# selector
# path_grouping_policy
# getuid_callout
# prio_callout
# path_checker
# rr_min_io
# rr_weight
# failback
# no_path_retry
/dev
10
"round-robin 0"
multibus
"/sbin/scsi_id -g -u -s /block/%n"
/bin/true
readsector0
100
priorities
immediate
fail
Configuration File Defaults
13