[root@localhost ~]# pvcreate /dev/sdc3 ------------创建PV+分区路径
Physical volume "/dev/sdc3" successfully created.
[root@localhost ~]# vgcreate -s 48m vg2 /dev/sdc3 -------创建vg + 容量+VG名称+ 分区路径
Volume group "vg2" successfully created
[root@localhost ~]# lvcreate -L 1g -n lv2 /dev/vg2 ----------创建lv+容量+lv名称+所使用的vg名称
Rounding up size to full physical extent 1.03 GiB
Logical volume "lv2" created.
[root@localhost ~]# lvs ----------查看创建后的lv信息
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
app rhel -wi-ao---- <1.80g
root rhel -wi-ao---- 12.00g
swap rhel -wi-ao---- 6.00g
lv1 vg1 -wi-ao---- 1.00g
lv2 vg2 -wi-a----- 1.03g --------此为最新创建的
[root@localhost ~]# mkfs.ext4 /dev/vg2/lv2 -------格式化lv
mke2fs 1.44.3 (10-July-2018)
Creating filesystem with 270336 4k blocks and 67680 inodes
Filesystem UUID: e4a7b4ad-8d12-4eea-a431-bc505a9fae1a
Superblock backups stored on blocks:
32768, 98304, 163840, 229376
Allocating group tables: done
Writing inode tables: done
Creating journal (8192 blocks): done
Writing superblocks and filesystem accounting information: done
[root@localhost ~]# mkdir /app/lv2 --------创建挂载目录
mkdir: cannot create directory ‘/app/lv2’: File exists
[root@localhost ~]# mount /dev/vg2/lv2 /app/lv2 --------挂载新lv到挂载点
[root@localhost ~]# df -Th -------查看详细的挂载信息 带文件type
Filesystem Type Size Used Avail Use% Mounted on
devtmpfs devtmpfs 888M 0 888M 0% /dev
tmpfs tmpfs 904M 0 904M 0% /dev/shm
tmpfs tmpfs 904M 9.8M 894M 2% /run
tmpfs tmpfs 904M 0 904M 0% /sys/fs/cgroup
/dev/mapper/rhel-root xfs 12G 3.9G 8.2G 32% /
/dev/mapper/rhel-app xfs 1.8G 46M 1.8G 3% /app
/dev/sda1 ext4 190M 131M 45M 75% /boot
tmpfs tmpfs 181M 16K 181M 1% /run/user/42
tmpfs tmpfs 181M 3.5M 178M 2% /run/user/0
/dev/sr0 iso9660 6.7G 6.7G 0 100% /run/media/root/RHEL-8-0-0-BaseOS-x86_64
/dev/mapper/vg1-lv1 ext4 976M 2.6M 907M 1% /app/lv1
/dev/mapper/vg2-lv2 ext4 1008M 2.6M 936M 1% /app/lv2
[root@localhost ~]# dd if=/dev/zero of=/app/lv2/testfile bs=10 count=10 --------查看文件系统是否有效
10+0 records in
10+0 records out
100 bytes copied, 0.000185469 s, 539 kB/s