Enabling The Device-Mapper Multipath; Rebooting The Linux Server; Recognizing The Post Device-Mapper Multipath Luns - Fujitsu ETERNUS2000 Connection Manual

Chapter 10 Setting Up and Checking the device-mapper multipath
> 10.1 For RHEL
10.1.2

Enabling the device-mapper multipath

Execute the following command to enable the device-mapper multipaths.
# multipath -v 1
# chkconfig --add multipathd
# chkconfig multipathd on
# multipath
# /etc/init.d/multipathd start
10.1.3

Rebooting the Linux Server

Reboot the Linux server.
Example:
# shutdown -r now
10.1.4

Recognizing the Post device-mapper multipath LUNs

Check the device file created by the device-mapper multipath.
Also check that the device file is linked to the "/dev/dm-X" file.
Example:
# cd /dev/mpath
# ls -l
lrwxrwxrwx 1 root root 8 Feb 15 20:21 mpath0 -> ../dm-28
lrwxrwxrwx 1 root root 8 Feb 15 20:21 mpath1 -> ../dm-29
lrwxrwxrwx 1 root root 8 Feb 15 20:21 mpath10 -> ../dm-13
lrwxrwxrwx 1 root root 7 Feb 15 20:21 mpath247 -> ../dm-46
lrwxrwxrwx 1 root root 8 Feb 15 20:21 mpath248 -> ../dm-50
lrwxrwxrwx 1 root root 7 Feb 15 20:21 mpath249 -> ../dm-155
P3AM-4212-02ENZ0 ETERNUS2000 Disk storage systems Server Connection Guide (SAS) for Linux
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