Не пойму где место на диске

[root@sernas ~]# fdisk -l
Disk /dev/sdb: 2000.4 GB, 2000398934016 bytes, 3907029168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk label type: dos
Disk identifier: 0x0002ab84
Устр-во Загр     Начало       Конец       Блоки   Id  Система
/dev/sdb1   *        2048     1026047      512000   83  Linux
/dev/sdb2         1026048  3891404799  1945189376   fd  Linux raid autodetect
/dev/sdb3      3891404800  3907028991     7812096   82  Linux swap / Solaris
Disk /dev/sda: 2000.4 GB, 2000398934016 bytes, 3907029168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk label type: dos
Disk identifier: 0x00094fa9
Устр-во Загр     Начало       Конец       Блоки   Id  Система
/dev/sda1            2048  3890380799  1945189376   fd  Linux raid autodetect
/dev/sda2   *  3890380800  3892477951     1048576   83  Linux
/dev/sda3      3892477952  3907028991     7275520   8e  Linux LVM
Disk /dev/mapper/cl-root: 6593 MB, 6593445888 bytes, 12877824 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk /dev/mapper/cl-swap: 855 MB, 855638016 bytes, 1671168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk /dev/md127: 1991.7 GB, 1991739703296 bytes, 3890116608 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes

[root@sernas ~]# pvdisplay
  --- Physical volume ---
  PV Name               /dev/sda3
  VG Name               cl
  PV Size               6,94 GiB / not usable 0   
  Allocatable           yes (but full)
  PE Size               4,00 MiB
  Total PE              1776
  Free PE               0
  Allocated PE          1776
  PV UUID               6xT6qq-8H0a-3dsn-cnPw-cSaj-U7RI-yYGcTs
[root@sernas ~]# vgdisplay
  --- Volume group ---
  VG Name               cl
  System ID             
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  3
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                2
  Open LV               2
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               6,94 GiB
  PE Size               4,00 MiB
  Total PE              1776
  Alloc PE / Size       1776 / 6,94 GiB
  Free  PE / Size       0 / 0   
  VG UUID               EUEsFU-Flps-xtTK-wO80-fqdT-ZNnc-fuASri
[root@sernas ~]# lvdisplay
  --- Logical volume ---
  LV Path                /dev/cl/swap
  LV Name                swap
  VG Name                cl
  LV UUID                HCTE7v-vYWU-yGji-MUSY-hSZo-kHrH-7lpmWd
  LV Write Access        read/write
  LV Creation host, time sernas, 2017-05-17 12:26:41 +0300
  LV Status              available
  # open                 2
  LV Size                816,00 MiB
  Current LE             204
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:1
   
  --- Logical volume ---
  LV Path                /dev/cl/root
  LV Name                root
  VG Name                cl
  LV UUID                O2YZYK-Z4uX-27b2-2ZT6-ipL8-Kfpi-dGN4Wb
  LV Write Access        read/write
  LV Creation host, time sernas, 2017-05-17 12:26:41 +0300
  LV Status              available
  # open                 1
  LV Size                6,14 GiB
  Current LE             1572
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:0

[root@sernas ~]# cat /proc/mdstat 
Personalities : [raid1] 
md127 : active raid1 sda1[1] sdb2[0]
      1945058304 blocks super 1.2 [2/2] [UU]
      bitmap: 0/15 pages [0KB], 65536KB chunk
unused devices: <none>

[root@sernas ~]# cat /etc/fstab 
#
# /etc/fstab
# Created by anaconda on Wed May 17 12:26:43 2017
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/cl-root     /                       xfs     defaults        0 0
UUID=15ae8fab-ec78-408f-811a-dad3db44ecae /boot                   xfs     defaults        0 0
/dev/mapper/cl-swap     swap                    swap    defaults        0 0

[root@sernas /]# pvcreate /dev/md127
File descriptor 7 (pipe:9067]) leaked on pvcreate invocation. Parent PID 10149: bash
WARNING: ext4 signature detected on /dev/md127 at offset 1080. Wipe it? [y/n]: n
  Aborted wiping of ext4.
  1 existing signature left on the device.

[root@sernas /]# df -h
Файловая система    Размер Использовано  Дост Использовано% Cмонтировано в
/dev/mapper/cl-root   6,2G         2,2G  4,0G           36% /
devtmpfs              1,8G            0  1,8G            0% /dev
tmpfs                 1,8G            0  1,8G            0% /dev/shm
tmpfs                 1,8G         8,7M  1,8G            1% /run
tmpfs                 1,8G            0  1,8G            0% /sys/fs/cgroup
/dev/sda2            1014M         232M  783M           23% /boot
tmpfs                 369M            0  369M            0% /run/user/0
/dev/md127            1,8T         1,4G  1,7T            1% /mnt

[root@sernas /]# blkid 
/dev/mapper/cl-root: UUID="3b14f6be-2d23-4aad-8584-82566c226a5d" TYPE="xfs" 
/dev/sda3: UUID="6xT6qq-8H0a-3dsn-cnPw-cSaj-U7RI-yYGcTs" TYPE="LVM2_member" 
/dev/sda2: UUID="15ae8fab-ec78-408f-811a-dad3db44ecae" TYPE="xfs" 
/dev/mapper/cl-swap: UUID="c785a8c6-f5ed-4c16-8d8f-e6f3d8ffcd70" TYPE="swap" 
/dev/sda1: UUID="77adebed-c6b2-8bab-5885-b2d1bad21751" UUID_SUB="40e47aef-c9fc-0112-925c-259ad7a0a07f" LABEL="sernas:root" TYPE="linux_raid_member" 
/dev/sdb1: UUID="06ad8df0-f025-4b59-9c28-9d85e4f8068e" TYPE="xfs" 
/dev/sdb2: UUID="77adebed-c6b2-8bab-5885-b2d1bad21751" UUID_SUB="14132a07-c590-716b-584d-16b47a9efd3e" LABEL="sernas:root" TYPE="linux_raid_member" 
/dev/sdb3: UUID="6d3676ee-c033-4975-9711-07c368687478" TYPE="swap" 
/dev/md127: UUID="25df5271-f911-4826-89d4-52bd4c02e927" TYPE="ext4"