命令格式：vgcreate -s PE<大小>   VG<名称>   PV<名称>

[root@localhost ~]# vgcreate -s 16M VG0 /dev/sdb1
 Volume group "VG0" successfully created
 [root@localhost ~]# vgdisplay VG0
 --- Volume group ---
 VG Name VG0
 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 192.00 MiB
 PE Size 16.00 MiB
 Total PE 12
 Alloc PE / Size 0 / 0
 Free PE / Size 12 / 192.00 MiB
 VG UUID 1YPQ0J-inrL-35tM-6iY7-ijr0-7c26-1ByX46

注：PE大小只能为2的幂数，且最大为512M