root@os-ctrl:~# fdisk -l

Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000537ee

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048      499711      248832   83  Linux
/dev/sda2          501758   976771071   488134657    5  Extended
/dev/sda5          501760   976771071   488134656   8e  Linux LVM

Disk /dev/sdb: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0004b6ca

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1            2048   976773119   488385536   83  Linux

Disk /dev/mapper/os--ctrl-root: 491.3 GB, 491274633216 bytes
255 heads, 63 sectors/track, 59727 cylinders, total 959520768 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/mapper/os--ctrl-root doesn't contain a valid partition table

Disk /dev/mapper/os--ctrl-swap_1: 8522 MB, 8522825728 bytes
255 heads, 63 sectors/track, 1036 cylinders, total 16646144 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/mapper/os--ctrl-swap_1 doesn't contain a valid partition table

Disk /dev/mapper/cinder--volumes-volume--ebfcf4ab--aa15--4cd7--a9fb--30e90c949e9                                                                  5: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders, total 41943040 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/mapper/cinder--volumes-volume--ebfcf4ab--aa15--4cd7--a9fb--30e90c949e9                                                                  5 doesn't contain a valid partition table
root@os-ctrl:~#