新建：
pvcreate /dev/vd[b-c]1
vgcreate alivg /dev/vd[b-c]1
lvcreate -l +100%free -i 2 -I 128 alivg -n alilv
mkfs.ext4 /dev/alivg/alilv
mount /dev/alivg/alilv /data/查看lv信息：
lvdisplay -m
--- Segments ---
Logical extents 0 to 10237:
Type striped
Stripes 2
Stripe size 512.00 KiB
Stripe 0:
Physical volume /dev/vdb1
Physical extents 0 to 5118
Stripe 1:
Physical volume /dev/vdc1
Physical extents 0 to 5118扩充：
pvcreate /dev/vd[d-e]1
vgextend alivg /dev/vd[d-e]1
lvresize -l +100%free -i 2 -I 128 /dev/alivg/alilv
resize2fs /dev/alivg/alilv标签：none