使用 virtualbox 的 clone 和 resize 命令后，我能够根据需要将 16GB 的动态磁盘扩展到 20GB。之后，我使用带有 gparted 和 lvm2 的 debian live ISO 并使用分配的空间扩展分区。
fdisk但显示如下所示的错误，并df显示分配的空间未更改。输出fdisk：
sudo fdisk -l
Disk /dev/sda: 21.0 GB, 20971520000 bytes
255 heads, 63 sectors/track, 2549 cylinders, total 40960000 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0000af96
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 499711 248832 83 Linux
/dev/sda2 501758 40959999 20229121 5 Extended
/dev/sda5 501760 40959999 20229120 8e Linux LVM
Disk /dev/mapper/mint--vg-root: 20.7 GB, 20711473152 bytes
255 heads, 63 sectors/track, 2518 cylinders, total 40452096 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/mint--vg-root doesn't contain a valid partition table
和df -h：
$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/mint--vg-root 12G 11G 29M 100% /
none 4.0K 0 4.0K 0% /sys/fs/cgroup
udev 734M 4.0K 734M 1% /dev
tmpfs 150M 1.1M 149M 1% /run
none 5.0M 0 5.0M 0% /run/lock
none 749M 964K 748M 1% /run/shm
none 100M 12K 100M 1% /run/user
/dev/sda1 236M 49M 176M 22% /boot
/dev/loop0 526M 82M 434M 16% /var/cache/openafs
AFS 2.0T 0 2.0T 0% /afs
输出lsblk：
$ sudo pvs
PV VG Fmt Attr PSize PFree
/dev/sda5 mint-vg lvm2 a-- 15.76g 24.00m
user@debian:~$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 19.5G 0 disk
├─sda1 8:1 0 243M 0 part
├─sda2 8:2 0 1K 0 part
└─sda5 8:5 0 15.8G 0 part
├─mint--vg-root
254:0 0 11.8G 0 lvm
└─mint--vg-swap_1
254:1 0 4G 0 lvm
sr0 11:0 1 1.1G 0 rom /lib/live/mount/medium
loop0 7:0 0 1008.4M 1 loop /lib/live/mount/rootfs/filesystem.squashfs
另外pvs，lvs正如vgs所问的：
$ sudo pvs
PV VG Fmt Attr PSize PFree
/dev/sda5 mint-vg lvm2 a-- 15.76g 24.00m
$ sudo vgs
VG #PV #LV #SN Attr VSize VFree
mint-vg 1 2 0 wz--n- 15.76g 24.00m
$ sudo lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
root mint-vg -wi-a----- 11.74g
swap_1 mint-vg -wi-a----- 4.00g
我想要扩展分区的客户操作系统是 Linux Mint，文件系统为 lvm2。我也尝试过使用以下命令中的指导https://www.centos.org/docs/5/html/Cluster_Logical_Volume_Manager/lv_extend.html但错误消息相同( Disk /dev/mapper/mint--vg-root doesn't contain a valid partition table)。我遗漏了什么？