If you want to add a new disk:
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ADD NEW Disk
root@data /home/rsa # fdisk /dev/xvdf
Command (m for help): n
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p): p
Partition number (1-4, default 1):
First sector (2048-2147483647, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-2147483647, default 2147483647):
Using default value 2147483647
Partition 1 of type Linux and of size 1024 GiB is set
Command (m for help): t
Selected partition 1
Hex code (type L to list all codes): 8e
Changed type of partition 'Linux' to 'Linux LVM'
Command (m for help): w
The partition table has been altered!
root@data /home/rsa # pvcreate /dev/xvdf1
root@data /home/rsa # vgs
VG #PV #LV #SN Attr VSize VFree
storage_grp 1 1 0 wz--n- <1024.00g 0
sysvg 1 2 0 wz--n- <74.50g 8.99g
root@data home/rsa # vgextend storage_grp /dev/xvdf1
Volume group "storage_grp" successfully extended
root@data /home/rsa # lvextend /dev/storage_grp/storage_vol /dev/xvdf1
Size of logical volume storage_grp/storage_vol changed from <1024.00 GiB (262143 extents) to <2.00 TiB (524286 extents).
Logical volume storage_grp/storage_vol successfully resized.
xfs_growfs /dev/storage_grp/storage_vol