Linux suse操作系统中同时运行着两种多路径管理软件，现关掉Linux suse自带的多路径管理软件，只启用EMC多路径管理软件.
Disabling dm-multipath to prepare for PowerPath installation on SLES 11 (SP2 or SP3)
1. Blacklist all devices in /etc/multipath.conf
a. Save a copy of /etc/multipath.conf as /etc/multipath.conf.bak for backup if it
already exists.
b. Edit /etc/multipath.conf so that it contains only the following lines:
blacklist {
devnode "*"
}
2. Ensure dm-multipath does not start automatically at boot.
# chkconfig multipathd off
# chkconfig --list multipathd --- Service should be off on all
run levels
3. Recreate initrd so that dm-multipath is excluded from initrd.
# mkinitrd -i /boot/initrd-pp-3.0.76-0.9-default -k
/boot/vmlinuz-3.0.76-0.9-default -f powerpath
4. Add a new boot entry with the initrd file created in the previous step in
/boot/grub/menu.lst file.
5. Reboot the host with the new initrd p_w_picpath and ensure dm-multipath has not
configured any device.
# multipath -ll --- should not return any dm devices
