Dell PowerVault MD3200i - Manual (Page 195)

Configuration: Device Mapper Multipath for Linux 193
\_ round-robin 0 [prio=1][enabled]
\_ 6:0:0:22 sdcl 69:144 [active][ghost]
where:
mpathb
is the name of the virtual device created by device mapper. It is
located in the /dev/mapper directory.
DELL
is the vendor of the device
MD3200i
is the model of the device
Sdx
is the physical path to the owning controller for the device
Sdcl
is the physical path to the non-owning controller for the device
Create a New fdisk Partition on a Multipath Device Node
The fdisk command allows creation of a partition space for a file system on
the newly scanned and mapped virtual disks that are presented to Device
Mapper.
To create a partition with the multipathing device nodes
/dev/mapper/mpath<x>, for example, use the following command, where
mpath<x> is the multipathing device node on which you want to create the
partition:
# fdisk /dev/mapper/mpath<x>
NOTE: The <x> value is an alphanumeric operating system dependent format. The
corresponding value for mapped virtual disks can be seen using the previously run
multipath command. See your operating system documentation for additional
information on fdisk.
Add a new Partition to Device Mapper
The kpartx command adds the newly fdisk created partition to the Device
Mapper list of usable partitions. See examples below, where mpath<x> is the
device node on which the partition was created.
# kpartx –a /dev/mapper/mpath<x>
If successful, the command does not display an output. To verify success and
view exact partition naming, you can use these commands to see the full
partition names assigned.
# cd /dev/mapper
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