注意以下操作只适配lvm哦。
- 查看磁盘
root@macmini-ubuntu:/data# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
loop0 7:0 0 49.8M 1 loop /snap/snapd/18357
loop1 7:1 0 63.3M 1 loop /snap/core20/1822
loop2 7:2 0 111.9M 1 loop /snap/lxd/24322
loop3 7:3 0 53.3M 1 loop /snap/snapd/19457
loop4 7:4 0 63.4M 1 loop /snap/core20/1974
loop5 7:5 0 4K 1 loop /snap/bare/5
loop6 7:6 0 91.7M 1 loop /snap/gtk-common-themes/1535
loop7 7:7 0 237.2M 1 loop /snap/firefox/2952
loop8 7:8 0 349.7M 1 loop /snap/gnome-3-38-2004/143
sda 8:0 0 931.5G 0 disk
├─sda1 8:1 0 1G 0 part /boot/efi
├─sda2 8:2 0 2G 0 part /boot
└─sda3 8:3 0 369.5G 0 part
├─ubuntu--vg-ubuntu--lv 253:0 0 100G 0 lvm /var/snap/firefox/common/host-hunspell
│ /由上查看到 sda3 有200G 空闲空间未分配。接下来我准备将200G空闲空间分配 根目录下的 data
- 先查看一下vg组
root@macmini-ubuntu:/data# vgs
WARNING: Device /dev/sda3 has size of 774852049 sectors which is smaller than corresponding PV size of 1947123712 sectors. Was device resized?
WARNING: One or more devices used as PVs in VG ubuntu-vg have changed sizes.
VG #PV #LV #SN Attr VSize VFree
ubuntu-vg 1 2 0 wz--n- <928.46g <828.46g由上可以看到，此vg组总容量为900多G，目前还能分配828G。
⚠️注意：这里是因为安装的时候Ubuntu空间分配我是保持的默认格式分配的，如有不一样很正常。如果未查看到有相关vg组的话需要创建一个。步骤如下：
# 先查看是否已存在pv（物理卷）
pvs
WARNING: Device /dev/sda3 has size of 774852049 sectors which is smaller than corresponding PV size of 1947123712 sectors. Was device resized?
WARNING: One or more devices used as PVs in VG ubuntu-vg have changed sizes.
PV VG Fmt Attr PSize PFree
/dev/sda3 ubuntu-vg lvm2 a-- <928.46g <828.46g
# 如果已经存在，那么则无需创建pv，如果没有则需先创建pv
pvcreate /dev/sda
# 创建完pv 后，则需要创建vg（卷组），并绑定到pv上么，自行替换对应的名称
vgcreare <vg_name> <pv>
# 创建完后使用下面的命令查看vg信息
vgs
WARNING: Device /dev/sda3 has size of 774852049 sectors which is smaller than corresponding PV size of 1947123712 sectors. Was device resized?
WARNING: One or more devices used as PVs in VG ubuntu-vg have changed sizes.
VG #PV #LV #SN Attr VSize VFree
ubuntu-vg 1 2 0 wz--n- <928.46g <828.46g- 创建lv（逻辑卷）
# 创建lv，并将之绑定的VG。自己指定大小名字，绑定到港创建的VG上
lvcreate -L <Size-of-LV> -n <LV-Name> <VG-Name>
# 例如
lvcreate -L 200G -n data-lv ubuntu-vg
# 查看创建结果
lvs
WARNING: Device /dev/sda3 has size of 774852049 sectors which is smaller than corresponding PV size of 1947123712 sectors. Was device resized?
WARNING: One or more devices used as PVs in VG ubuntu-vg have changed sizes.
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
data-lv ubuntu-vg -wi-ao---- 200.00g
ubuntu-lv ubuntu-vg -wi-ao---- 100.00g- 格式化分区
# 设备名格式 /dev/vg卷组名/lv名 按照格式自行替换
mkfs.ext4 /dev/ubuntu-vg/data-lv也可以不执行跳过，只是看到有些教程有提到。个人操作未执行，无问题。
# 执行下面的命令，用 xfs 文件系统格式化 LVM 分区： sudo mkfs.xfs /dev/ubuntu-vg/data-lv
- 挂载
# 创建目录
mkdir -p /data
# 挂载
mount /dev/ubuntu-vg/data-lv /data/
# 验证
pvs
WARNING: Device /dev/sda3 has size of 774852049 sectors which is smaller than corresponding PV size of 1947123712 sectors. Was device resized?
WARNING: One or more devices used as PVs in VG ubuntu-vg have changed sizes.
PV VG Fmt Attr PSize PFree
/dev/sda3 ubuntu-vg lvm2 a-- <928.46g <628.46g
vgs
WARNING: Device /dev/sda3 has size of 774852049 sectors which is smaller than corresponding PV size of 1947123712 sectors. Was device resized?
WARNING: One or more devices used as PVs in VG ubuntu-vg have changed sizes.
VG #PV #LV #SN Attr VSize VFree
ubuntu-vg 1 2 0 wz--n- <928.46g <628.46g
lvs
WARNING: Device /dev/sda3 has size of 774852049 sectors which is smaller than corresponding PV size of 1947123712 sectors. Was device resized?
WARNING: One or more devices used as PVs in VG ubuntu-vg have changed sizes.
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
data-lv ubuntu-vg -wi-ao---- 200.00g
ubuntu-lv ubuntu-vg -wi-ao---- 100.00g
df -Th
Filesystem Type Size Used Avail Use% Mounted on
tmpfs tmpfs 783M 1.7M 781M 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv ext4 98G 14G 80G 15% /
tmpfs tmpfs 3.9G 0 3.9G 0% /dev/shm
tmpfs tmpfs 5.0M 0 5.0M 0% /run/lock
/dev/sda2 ext4 2.0G 253M 1.6G 14% /boot
/dev/sda1 vfat 1.1G 6.1M 1.1G 1% /boot/efi
tmpfs tmpfs 3.9G 0 3.9G 0% /run/qemu
tmpfs tmpfs 783M 4.0K 783M 1% /run/user/0
/dev/mapper/ubuntu--vg-data--lv ext4 196G 28K 186G 1% /data
lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
loop0 7:0 0 49.8M 1 loop /snap/snapd/18357
loop1 7:1 0 63.3M 1 loop /snap/core20/1822
loop2 7:2 0 111.9M 1 loop /snap/lxd/24322
loop3 7:3 0 53.3M 1 loop /snap/snapd/19457
loop4 7:4 0 63.4M 1 loop /snap/core20/1974
loop5 7:5 0 4K 1 loop /snap/bare/5
loop6 7:6 0 91.7M 1 loop /snap/gtk-common-themes/1535
loop7 7:7 0 237.2M 1 loop /snap/firefox/2952
loop8 7:8 0 349.7M 1 loop /snap/gnome-3-38-2004/143
sda 8:0 0 931.5G 0 disk
├─sda1 8:1 0 1G 0 part /boot/efi
├─sda2 8:2 0 2G 0 part /boot
└─sda3 8:3 0 369.5G 0 part
├─ubuntu--vg-ubuntu--lv 253:0 0 100G 0 lvm /var/snap/firefox/common/host-hunspell
│ /
└─ubuntu--vg-data--lv 253:1 0 200G 0 lvm /data
# 随便往里面存点什么东西，验证通过后我们需要永久挂载
echo '/dev/ubuntu-vg/data-lv /data/ ext4 defaults 0 0' | sudo tee -a /etc/fstab
标签：vg,分区,VG,dev,lv,Ubuntu,ubuntu,lvm,snap From： https://blog.51cto.com/u_14907428/7056414