Red Hat ENTERPRISE LINUX 5 DM MULTIPATH Configuration And Administration Manual page 26

Chapter 4. The DM-Multipath Configuration File
Attribute
failback
no_path_retry
flush_on_last_del
queue_without_daemon
user_friendly_names
bindings_file
mode
uid
16
Description
next path, the number of requests to send is determined by
rr_min_io times the path's priority, as determined by the
prio_callout program. Currently, there are priority callouts only
for devices that use the group_by_prio path grouping policy,
which means that all the paths in a path group will always have the
same priority.
If set to uniform, all path weights are equal. The default value is
uniform.
Specifies path group failback.
A value of 0 or immediate specifies that as soon as there is a
path group with a higher priority than the current path group the
system switches to that path group.
A numeric value greater than zero specifies deferred failback,
expressed in seconds.
A value of manual specifies that failback can happen only with
operator intervention.
The default value is manual.
A numeric value for this attribute specifies the number of times
the system should attempt to use a failed path before disabling
queueing.
A value of fail indicates immediate failure, without queuing.
A value of queue indicates that queuing should not stop until the
path is fixed.
The default value is (null).
(RHEL 5.3 and later) If set to yes, the multipathd daemon will
disable queueing when the last path to a device has been deleted.
The default value is no.
(RHEL 5.3 and later) If set to no, the multipathd daemon will
disable queueing for all devices when it is shut down. The default
value is yes.
If set to yes, specifies that the system should using the bindings
file to assign a persistent and unique alias to the multipath, in
the form of mpathn. The default location of the bindings file is
/var/lib/multipath/bindings, but this can be changed
with the bindings_file option. If set to no, specifies that the
system should use use the WWID as the alias for the multipath. In
either case, what is specified here will be overriden by any device-
specific aliases you specify in the multipaths section of the
configuration file. The default value is no.
(RHEL 5.2 and later) The location of the bindings file that is
used with the user_friend_names option. The default value is /
var/lib/multipath/bindings.
(RHEL 5.3 and later) The mode to use for the multipath device
nodes, in octal. The default value is determined by the process.
(RHEL 5.3 and later) The user ID to use for the multipath device
nodes. You must use the numeric user ID. The default value is
determined by the process.