vgscan
pvcreate /dev/sda3 /dev/sda2 创建PV
vgcreate cache3 /dev/sda2 /dev/sda2 创建VG
lvcreate -l 100%VG -n lvcache3 cache3 创建LV
mkfs.ext3 /dev/cache3/lvcache3 格式化
mount /dev/cache3/lvcache3 /opt
vgscan
pvcreate /dev/sda3 /dev/sda2 创建PV
vgcreate cache3 /dev/sda2 /dev/sda2 创建VG
lvcreate -l 100%VG -n lvcache3 cache3 创建LV
mkfs.ext3 /dev/cache3/lvcache3 格式化
mount /dev/cache3/lvcache3 /opt