007.LVM查看命令

1 [root@kauai ~]# pvdisplay #显示有关物理卷的信息  
2 --- Physical volume ---  
3 PV Name /dev/sdb5 #PV名称  
4 VG Name vg01 #所在VG名称  
5 PV Size 1.00 GiB / not usable 4.00 MiB  
6 Allocatable yes (but full)  
7 PE Size 4.00 MiB #默认PE大小  
8 Total PE 255 #总PE数量  
9 Free PE 0  
10 Allocated PE 255  
11 PV UUID 331BHd-H8WO-B3sY-GDEu-doJz-K69U-tmbJT2  
12 ……

1 [root@kauai ~]# vgdisplay #显示卷组相关属性  
2 --- Volume group ---  
3 VG Name vg01  
4 System ID  
5 Format lvm2  
6 Metadata Areas 2  
7 Metadata Sequence No 3  
8 VG Access read/write  
9 VG Status resizable  
10 MAX LV 0  
11 Cur LV 1  
12 Open LV 1  
13 Max PV 0  
14 Cur PV 2  
15 Act PV 2  
16 VG Size 1.99 GiB #整个VG容量的大小  
17 PE Size 4.00 MiB #每个PE的大小  
18 Total PE 510 #总共PE的数量  
19 Alloc PE / Size 256 / 1.00 GiB  
20 Free PE / Size 254 / 1016.00 MiB #空余PE的数量/大小  
21 VG UUID Z6H61K-6Ti8-lQe0-4PA6-z2A5-zZOS-dCldKc #VG的UUID号

1 [root@kauai ~]# lvdisplay #显示有关逻辑卷的信息  
2 --- Logical volume ---  
3 LV Path /dev/vg01/lv01  
4 LV Name lv01  
5 VG Name vg01  
6 LV UUID av6V4h-3mWN-6e1c-RJXm-fata-QXNQ-550wVs  
7 LV Write Access read/write  
8 LV Creation host, time kauai.example.net, 2016-08-30 15:38:29 +0800  
9 LV Status available  
10 # open 1  
11 LV Size 1.00 GiB #逻辑卷大小  
12 Current LE 256  
13 Segments 2  
14 Allocation inherit  
15 Read ahead sectors auto  
16 - currently set to 8192  
17 Block device 253:0

1 [root@kauai ~]# pvscan #显示每个/总PV的相关信息和所有PV信息  
2 PV /dev/sdb5 VG vg01 lvm2 [1020.00 MiB / 0 free] #此PV以分配个LV01，因此没有空余  
3 PV /dev/sdb6 VG vg01 lvm2 [1020.00 MiB / 1016.00 MiB free] #此PV空闲  
4 Total: 2 [1.99 GiB] / in use: 2 [1.99 GiB] / in no VG: 0 [0 ] #总PV情况

1 [root@kauai ~]# vgscan #扫描存在的vg  
2 Reading all physical volumes. This may take a while...  
3 Found volume group "vg01" using metadata type lvm2

1 [root@kauai ~]# lvscan #扫描LV情况  
2 ACTIVE '/dev/vg01/lv01' [1.00 GiB] inherit