fdisk -l
Disk /dev/sda: 120 GiB, 128849018880 bytes, 251658240 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
Disklabel type: dos
Disk identifier: 0x6e1af0b8
Device Boot Start End Sectors Size Id Type
/dev/sda1 * 2048 39063551 39061504 18.6G 83 Linux
/dev/sda2 39065598 136720383 97654786 46.6G 5 Extended
/dev/sda3 136720384 251658239 114937856 54.8G 83 Linux
/dev/sda4 136720384 251658239 114937856 54.8G 8e Linux LVM
/dev/sda5 39065600 136720383 97654784 46.6G 83 Linux
sudo pvcreate /dev/sda4
Physical volume "/dev/sda4" successfully created
创建VG
sudo vgcreate ubuntu /dev/sda4
Volume group "ubuntu" successfully created
sudo vgdisplay
--- Volume group ---
VG Name ubuntu
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 1
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 0
Open LV 0
Max PV 0
Cur PV 1
Act PV 1
VG Size 54.80 GiB
PE Size 4.00 MiB
Total PE 14030
Alloc PE / Size 0 / 0
Free PE / Size 14030 / 54.80 GiB
VG UUID ZVT3y2-Mw04-T2BS-5pms-YPCN-xe1y-Kh3CdB
pvscan 查看当前PV使用情况
sudo pvscan
PV /dev/sda4 VG ubuntu lvm2 [54.80 GiB / 54.80 GiB free]
Total: 1 [54.80 GiB] / in use: 1 [54.80 GiB] / in no VG: 0 [0 ]
创建一个lv,占用PV中40G空间
lvcreate -L 40G -n lv ubuntu
提示
Logical volume "lv" created.
ls -l /dev/ubuntu/lv
lrwxrwxrwx 1 root root 7 Mar 29 14:51 /dev/ubuntu/lv -> ../dm-0
格式化分区
mkfs -t ext4 /dev/ubuntu/lv
mkdir /data2
开机自动挂载
vi /etc/fstab
在最下增加一行
/dev/ubuntu/lv /data2 ext4 defaults 0 0
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