我有一个包含两个物理卷(PV)的卷组(VG).
VG中的几个逻辑卷(LV)可能在两个PV上使用扩展区.
VG中的几个逻辑卷(LV)可能在两个PV上使用扩展区.
有没有办法告诉哪些LV占用PVs的空间？
解决方法
pvdisplay命令具有-m选项,用于显示物理扩展区到逻辑卷和逻辑扩展区的映射.
我在测试机器上设置了以下情况：
> 3个1GB的磁盘,每个磁盘都添加到系统中,并用作vg_test的物理卷
> 6个不同大小(从300M到1.1G)的逻辑卷,以便它们分布在物理卷上
在此计算机上运行pvdisplay -m会产生以下输出：
[root@centos6 ~]# pvdisplay -m
--- Physical volume ---
PV Name /dev/sdb
VG Name vg_test
PV Size 1.00 GiB / not usable 4.00 MiB
Allocatable yes
PE Size 4.00 MiB
Total PE 255
Free PE 5
Allocated PE 250
PV UUID eR2ko2-aKRf-uCfq-O2L0-z6em-ZYT5-23YhKb
--- Physical Segments ---
Physical extent 0 to 74:
Logical volume /dev/vg_test/one
Logical extents 0 to 74
Physical extent 75 to 149:
Logical volume /dev/vg_test/two
Logical extents 0 to 74
Physical extent 150 to 249:
Logical volume /dev/vg_test/four
Logical extents 0 to 99
Physical extent 250 to 254:
FREE
--- Physical volume ---
PV Name /dev/sdc
VG Name vg_test
PV Size 1.00 GiB / not usable 4.00 MiB
Allocatable yes
PE Size 4.00 MiB
Total PE 255
Free PE 10
Allocated PE 245
PV UUID rByjXK-NA6D-ifnY-lKdF-eFWg-Ndou-psGJUq
--- Physical Segments ---
Physical extent 0 to 124:
Logical volume /dev/vg_test/three
Logical extents 0 to 124
Physical extent 125 to 224:
Logical volume /dev/vg_test/five
Logical extents 0 to 99
Physical extent 225 to 244:
Logical volume /dev/vg_test/six
Logical extents 255 to 274
Physical extent 245 to 254:
FREE
--- Physical volume ---
PV Name /dev/sdd
VG Name vg_test
PV Size 1.00 GiB / not usable 4.00 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 255
Free PE 0
Allocated PE 255
PV UUID TCJnZM-0ss9-o5gY-lgD3-7Kq6-18IH-sN04To
--- Physical Segments ---
Physical extent 0 to 254:
Logical volume /dev/vg_test/six
Logical extents 0 to 254
如您所见,您可以很好地了解6个逻辑卷中每个逻辑卷的范围.
