这种系统盘怎么扩容，2T只给了我200G

xkc大佬：
Disk identifier: 1B43C402-8376-4416-9804-ACF17760D7FD

Device       Start        End    Sectors  Size Type
/dev/sda1     2048       4095       2048    1M BIOS boot
/dev/sda2     4096    2101247    2097152    1G Linux filesystem
/dev/sda3  2101248 4004638798 4002537551  1.9T Linux filesystem

Disk /dev/mapper/ubuntu–vg-ubuntu–lv: 200 GiB, 214748364800 bytes, 419430400 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 262144 bytes / 262144 bytes

growpart 加 resize不好使