Dell PowerVault MD3200 Owner's Manual page 185

2 Edit the /etc/multipath.conf file as follows:
blacklist {
wwid
...
}
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.
Important Information About Special Partitions
When using Device Mapper with the MD3200 Series array, all physical disks
are assigned a disk device node. This includes a special device type used for
in-band management of the MD3200 Series array, known as the Access Disk
or Universal Xport device.
CAUTION:
Certain commands, such as lsscsi, displays one or more instances of
Universal Xport devices. These device nodes must never be accessed, mounted, or
used in any way. Doing so could cause loss of communication to the storage array
and possibly cause serious damage to the storage array, potential making data
stored on the array inaccessible.
Only multipathing device nodes and partition nodes created using the
directions provided above must be mounted or in any way accessed by the
host system or its users.
drive_wwid
vendor_string
RedHat version 6.0 and 6.1 users must rebuild the initramfs root file
Configuration: Device Mapper Multipath for Linux
185