Novell LINUX ENTERPRISE SERVER 11 - STORAGE ADMINISTRATION GUIDE 2-23-2010 Administration Manual page 59

NOTE: The keyword devnode_blacklist has been deprecated and replaced with the keyword
blacklist.
For example, to blacklist local devices and all arrays from the
multipath, the
blacklist
blacklist {
wwid 26353900f02796769
devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st|sda)[0-9]*"
devnode "^hd[a-z][0-9]*"
devnode "^cciss!c[0-9]d[0-9].*"
}
You can also blacklist only the partitions from a driver instead of the entire array. For example, using
the following regular expression blacklists only partitions from the cciss driver and not the entire
array:
^cciss!c[0-9]d[0-9]*[p[0-9]*]
After you modify the
/etc/multipath.conf
on your system, then reboot in order for the changes to take effect.
Afterwards, the local devices should no longer be listed in the multipath maps when you issue the
command.
multipath -ll
Configuring Default Multipath Behavior in /etc/multipath.conf
The
/etc/multipath.conf
behaviors. If the field is not otherwise specified in a
that SAN configuration.
The following defaults section specifies a simple failover policy:
defaults {
multipath_tool
udev_dir
polling_interval 10
default_selector
default_path_grouping_policy
default_getuid
default_prio_callout
default_features
rr_min_io
failback
NOTE: In the
default_getuid
above example instead of the sample path of
usr/share/doc/packages/multipath-tools/multipath.conf.synthetic
default and annotated sample files).
Configuring Default Settings for zSeries in /etc/multipath.conf
Testing of the IBM zSeries device with multipathing has shown that the dev_loss_tmo parameter
should be set to 90 seconds, and the fast_io_fail_tmo parameter should be set to 5 seconds. If you
are using zSeries devices, modify the
section looks like this:
file, you must run
file should contain a
defaults
"/sbin/multipath -v0"
/dev
"round-robin 0"
failover
"/sbin/scsi_id -g -u -s /block/%n"
"/bin/true"
"0"
100
immediate
command line, use the path
/lib/udev/scsi_id
/etc/multipath.conf
driver from being managed by
cciss
to re-create the INITRD
mkinitrd
section where you can specify default
section, the default setting is applied for
device
/sbin/scsi_id
that is found in the sample file
file to specify the values as follows:
Managing Multipath I/O for Devices
as shown in the
/
file (and in the
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