Blacklist Exceptions; Configuration File Defaults - Red Hat DEVICE-MAPPER MULTIPATH 5.2 Configuration And Administration Manual

Chapter 4. The DM-Multipath Configuration File
vendor
product "3S42"
}
device {
vendor
product "*"
}
}

2.4. Blacklist Exceptions

You can use the
blacklist_exceptions
on devices that have been blacklisted by default. For example, by default, devices with vendor =
"IBM" and product = "S/390.*" are blacklisted since usually DASD devices are used for local
storage. If you do need to enable multipathing on these devices, uncomment the following lines
in the configuration file:
blacklist_exceptions {
device {
vendor
product "S/390.*"
}
}
When specifying devices in the
must specify the exceptions in the same way they were specified in the blacklist. For example, a
WWID exception will not apply to devices specified by a
blacklisted device is associated with that WWID. Similarly,
entries, and
devnode device

3. Configuration File Defaults

The
/etc/multipath.conf
user_friendly_names
defaults {
user_friendly_names yes
}
This overwrites the default value of the
The configuration file includes a template of configuration defaults. This section is commented
out, as follows.
#defaults {
20
"IBM"
"HP"
section of the configuration file to enable multipathing
"IBM"
blacklist_exceptions
exceptions apply only to device entries.
configuration file includes a
parameter to , as follows.
yes
user_friendly_names
#DS4200 Product 10
section of the configuration file, you
blacklist entry, even if the
devnode
exceptions apply only to
devnode
section that sets the
defaults
parameter.