Dell POWERVAULT MD3600F Owner's Manual page 225

Blacklist Local Drive in Multi-path Driver
If your multipath drivers are connecting to storage area networks (SANs), it
may be useful to be able to exclude or "blacklist" certain devices in your
/etc/multipath.conf file. Blacklisting prevents the multipath driver
from attempting to use those local devices.
To blacklist a local drive or device:
1 Run the multipath -l command to determine the local drive or
device WWID (World-Wide Identifier) or vendor/model string.
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
force
3 Reboot the host.
Important Information About Special Partitions
When using Device Mapper with the MD3600f Series array, all physical disks
are assigned a disk device node. This includes a special device type used for
in-band management of the MD3600f Series array, known as the Access Disk
or Universal Xport device.
drive_wwid
vendor_string
RedHat version 6.0 and 6.1 users must rebuild the initramfs root file
command.
Configuration: Device Mapper Multipath for Linux
#dracut -
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