User guide

Step 2:

# rpm -ivh ddn_mpath_SLES11-1.1-0.x86_64.rpm

Preparing... ########################################### [100%]

1:ddn_mpath_SLES11 ########################################### [100%]

The DDN mpath config file has been installed as /etc/multipath.conf.ddn.

Rename this file to /etc/multipath.conf if the file does not already exist.

Manually merge the DDN supplied file with /etc/multipath.conf if one is

already in use. Please read the DDN Multipath Manual for more information.

3.2 MERGING THE /ETC/MULTIPATH.CONF.DDN FILE

After installing the DDN multipath rpm, a file name /etc/multipath.conf.ddn will be installed in

the hosts /etc/ directory.

If the host has no devices managed under dm-multipath and the current file

/etc/multipath.conf file is not actively used, then it is possible to backup the existing

/etc/multipath file and replace it with the/etc/multipath.conf.ddn file using the following steps:

mv -f/etc/multipath.conf /etc/multipath.config.original

cp -f /etc/multipath.conf.ddn /etc/multipath.conf

Be sure to edit the {blacklist} section to ignore the devices that should not be managed or

queried by dm-multipath. The administrator must analyze system SCSI device targets and

update blacklist appropriately.

Example 1: the configuration below, when merged into, will cause the /dev/sda and all its

partitions to be ignored by dm-multipath:

blacklist {

devnode "^sda[0-9]*$"

}

Blacklist and blacklist_exception example to where multipathd will only attempt to manage

devices with a vendor inquiry string of “DDN”

blacklist {

device {

vendor=”*”

}

blacklist_exception {

device {

vendor=”DDN”

}