我在 Raid10 中有 4 个 4TB 硬盘，总空间为 8TB。我安装了 Ubuntu 20.04，发现文件系统的最大空间为 63GB。如何扩展它以达到总容量？
root@ubuntu:~# df -h
Filesystem Size Used Avail Use% Mounted on
udev 63G 0 63G 0% /dev
tmpfs 13G 2.3M 13G 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv 98G 11G 83G 12% /
tmpfs 63G 0 63G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 63G 0 63G 0% /sys/fs/cgroup
/dev/loop1 68M 68M 0 100% /snap/lxd/21835
/dev/loop2 44M 44M 0 100% /snap/snapd/14978
/dev/loop0 62M 62M 0 100% /snap/core20/1328
/dev/sda2 2.0G 107M 1.7G 6% /boot
/dev/sda1 1.1G 5.3M 1.1G 1% /boot/efi
tmpfs 13G 0 13G 0% /run/user/1000
root@ubuntu:~# lsblk -o NAME,FSTYPE,SIZE,MOUNTPOINT,LABEL
NAME FSTYPE SIZE MOUNTPOINT LABEL
loop0 squashfs 61.9M /snap/core20/1328
loop1 squashfs 67.2M /snap/lxd/21835
loop2 squashfs 43.6M /snap/snapd/14978
sda 7.3T
├─sda1 vfat 1.1G /boot/efi
├─sda2 ext4 2G /boot
└─sda3 LVM2_member 7.3T
└─ubuntu--vg-ubuntu--lv ext4 100G /
sr0 1024M
root@ubuntu:~# pvs
PV VG Fmt Attr PSize PFree
/dev/sda3 ubuntu-vg lvm2 a-- 7.27t <7.18t
root@ubuntu:~# vgs
VG #PV #LV #SN Attr VSize VFree
ubuntu-vg 1 1 0 wz--n- 7.27t <7.18t
root@ubuntu:~# lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
ubuntu-lv ubuntu-vg -wi-ao---- 100.00g