# lvm添加新硬盘

1. 初始化/dev/sdb为PV

pvcreate /dev/sdb

2. 追加到已有VG组(centos_hikvisionos)

# 追加
vgextend centos_hikvisionos /dev/sdb
# 创建新的VG组
vgcreate ${NewVG} /dev/sdb

多个PV加入VG组时，列在VG组后面以空格分隔

3. 创建LV

# VG组centos_hikvisionos剩余所有空间分配到${LVName}
lvcreate -l +100%free -n ${LVName} centos_hikvisionos
# 分配指定大小空间
lvcreate -L 5G -n ${LVName} centos_hikvisionos

4. 格式化LV

mkfs -t xfs /dev/centos_hikvisionos/${LVName}

5. 挂盘

mkdir /data
echo "/dev/mapper/centos_hikvisionos-${LVName} /data xfs default 0 0" >> /etc/fstab
mount -a

# 扩展示例
#!/bin/bash
pvcreate /dev/sdb
vgextend centos_hikvisionos /dev/sdb
# lvextend -L +2G /dev/centos_hikvisionos/opt
lvextend -l +50%FREE /dev/centos_hikvisionos/opt
xfs_growfs /dev/centos_hikvisionos/opt
lvextend -l +50%FREE /dev/centos_hikvisionos/root
xfs_growfs /dev/centos_hikvisionos/root