root@lighthouse:~# fdisk /dev/sdc
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0x483e6418.
Changes will remain in memory only, until you decide to write them.
After that, of course, the previous content won't be recoverable.

Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)

Command (m for help): n
Partition type:
   p   primary (0 primary, 0 extended, 4 free)
   e   extended
Select (default p):
Using default response p
Partition number (1-4, default 1):
Using default value 1
First sector (2048-61288447, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-61288447, default 61288447):
Using default value 61288447

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.
root@lighthouse:~# lvm pvcreate /dev/sdc1
  Physical volume "/dev/sdc1" successfully created
root@lighthouse:~# lvm vgcreate usbz /dev/sdc1
  Volume group "usbz" successfully created
root@lighthouse:~# lvm lvcreate -l 100%FREE -n zebra usbz
  Logical volume "zebra" created
root@lighthouse:~# mke2fs -t ext4 -O ^has_journal -m 0 /dev/mapper/usbz-zebra
mke2fs 1.42.8 (20-Jun-2013)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
1916928 inodes, 7660544 blocks
0 blocks (0.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=0
234 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
	32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
	4096000

Allocating group tables: done
Writing inode tables: done
Writing superblocks and filesystem accounting information: done

root@lighthouse:~# mount /dev/mapper/usbz-zebra /media/zebra/
root@lighthouse:/media/zebra# dd if=/dev/zero of=Zeros bs=1M count=16
16+0 records in
16+0 records out
16777216 bytes (17 MB) copied, 0.104935 s, 160 MB/s
root@lighthouse:/media/zebra# lvm lvcreate --snapshot -n snap1 usbz/zebra
  Please specify either size or extents with snapshots.