Linux创建LVM

1：将物理磁盘设备条带化为物理卷

[root@gechong~]#pvcreate/dev/sdb

查看物理卷：

[root@gechong~]#pvs

或者

[root@gechong~]#pvdisplay

2：创建卷组，并添加PV到卷组

[root@gechong~]#vgcreatevg_gechong/dev/sdb

查看卷组

[root@gechong~]#vgs

或者

[root@gechong~]#vgdisplay

现在创建好了物理卷和卷组还不能使用。

创建完卷组后/dev/vgname多了一个文件夹

[root@gechong~]#ll/dev/vg*
crw-rw----.1rootroot10,6311月619:11/dev/vga_arbiter

/dev/vg_gechong:
总用量0
lrwxrwxrwx.1rootroot711月619:11lv_root->../dm-0
lrwxrwxrwx.1rootroot711月619:11lv_swap->../dm-1

实际位置是在这里

[root@gechongvg_gechong]#cd/dev/mapper/

3：基于卷组创建逻辑卷

[root@gechong~]#lvcreate-nlv_root-L16Gvg_gechong

查看逻辑卷

[root@gechong~]#lvs
LVVGAttrLSizePoolOriginData%MoveLogCpy%SyncConvert
lv_rootvg_gechong-wi-ao---16.51g
lv_swapvg_gechong-wi-ao---3.00g
[root@gechong~]#lvdisplay
---Logicalvolume---
LVPath/dev/vg_gechong/lv_root
LVNamelv_root
VGNamevg_gechong
LVUUIDyatm0L-pnIX-d9Rf-zfTf-0PPq-9zJC-K0Lh5J
LVWriteAccessread/write
LVCreationhost,timegechong,2013-10-1323:57:50+0800
LVStatusavailable
#open1
LVSize16.51GiB
CurrentLE4226
Segments1
Allocationinherit
Readaheadsectorsauto
-currentlysetto256
Blockdevice252:0

---Logicalvolume---
LVPath/dev/vg_gechong/lv_swap
LVNamelv_swap
VGNamevg_gechong
LVUUIDcxINGt-Nae0-XJYA-6gEV-N6lM-20zG-cWhY0Z
LVWriteAccessread/write
LVCreationhost,timegechong,2013-10-1323:58:02+0800
LVStatusavailable
#open2
LVSize3.00GiB
CurrentLE768
Segments1
Allocationinherit
Readaheadsectorsauto
-currentlysetto256
Blockdevice252:1

4：为逻辑卷创建文件系统

[root@gechongvg_gechong]#mkfs.ext4/dev/vg_gechong/lv_swap

5：将格式化好的逻辑卷挂载使用

[root@gechongvg_gechong]#mount/dev/vg_gechong/lv_swap/mnt/vg/lv_swap

6：删除逻辑卷

删除逻辑卷之前必须先卸载

[root@gechongvg_gechong]#lvremove/dev/vg_gechong/lv_swap

7：删除卷组

[root@gechongvg_gechong]#vgremovevg_gechong

8：删除物理卷

[root@gechongvg_gechong]#pvremove/dev/sdb