Linux Host Server Reboot Best Practices - Dell POWERVAULT MD3620I Owner's Manual

or
blacklist {
device {
vendor
model model_string
};
NOTE:
image to include the updated configuration file by running the #dracut -force
command.
3 Reboot the host.

Linux Host Server Reboot Best Practices

It is recommended that you follow the procedures given below while
rebooting your Linux host server using Device Mapper multipathing with an
MD3600i Series storage array.
1 Unmount all Device Mapper multipath device nodes mounted on the
server:
# umount <mounted_multipath_device_node>
2 Stop the Device Mapper multipath service:
# /etc/init.d/multipathd stop
202
Configuration: Device Mapper Multipath for Linux
vendor_string
RedHat version 6.0 and 6.1 users must rebuild the initramfs root file