すでにLVを設定していますが、ルートにさらにディスクを追加するにはどうすればよいですか？フォーマットせずにディスクにすべてを保存したいです。
df -h
Filesystem Size Used Avail Use% Mounted on
udev 60G 4.0K 60G 1% /dev
tmpfs 12G 1.3M 12G 1% /run
/dev/sda1 4.2G 4.0G 0 100% /
none 4.0K 0 4.0K 0% /sys/fs/cgroup
none 5.0M 0 5.0M 0% /run/lock
none 60G 88K 60G 1% /run/shm
none 100M 24K 100M 1% /run/user
overflow 1.0M 84K 940K 9% /tmp
/dev/sda6 11G 101M 11G 1% /home
/dev/mapper/so_data-lv_so_data 3.0T 2.1T 739G 75% /nsm
lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 30G 0 disk
├─sda1 8:1 0 4.3G 0 part /
├─sda2 8:2 0 1K 0 part
├─sda5 8:5 0 555M 0 part [SWAP]
└─sda6 8:6 0 11.1G 0 part /home
sdb 8:16 0 3T 0 disk
└─so_data-lv_so_data (dm-0) 252:0 0 3T 0 lvm /nsm
sr0 11:0 1 1024M 0 rom
sudo lvdisplay
--- Logical volume ---
LV Path /dev/so_data/lv_so_data
LV Name lv_so_data
VG Name so_data
LV UUID rVjGS2-z1IV-1zxJ-dWZ9-BJ9C-eyiu-lkhe9i
LV Write Access read/write
LV Creation host, time O11-PL-ONIAP01, 2018-04-04 14:14:54 +0000
LV Status available
# open 1
LV Size 3.00 TiB
Current LE 786431
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:0
sudo vgdisplay
--- Volume group ---
VG Name so_data
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 2
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 1
Open LV 1
Max PV 0
Cur PV 1
Act PV 1
VG Size 3.00 TiB
PE Size 4.00 MiB
Total PE 786431
Alloc PE / Size 786431 / 3.00 TiB
Free PE / Size 0 / 0
VG UUID 1LoFln-1c6n-3u57-6Upy-Ckf2-rso9-l6iOB4
sudo pvdisplay
--- Physical volume ---
PV Name /dev/sdb
VG Name so_data
PV Size 3.00 TiB / not usable 4.00 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 786431
Free PE 0
Allocated PE 786431
PV UUID 2nKfAn-tb1e-tqDw-68nw-08e3-LuiQ-2rUwHC