linux 逻辑卷管理 调整分区大小例子

文章就是一个关于linux 逻辑卷管理 调整分区大小例子,我们只要按下面代码操作就完成100％完成逻辑卷管理 调整分区大小了.

测试机各种报错,创建个目录都报错,df看了一下,发现VolGroup-lv_root 100%,虚拟磁盘满了,怎么办呢.

1，解决过程

1. #df-h//查看分区
2. #umount/home//取消挂载
3. #e2fsck-f/dev/mapper/VolGroup-lv_home//分区检测
4. #resize2fs-p/dev/mapper/VolGroup-lv_home100G//将lv_home虚拟分区设为100G
5. #mount/home//挂载home
6. #df-h//查看分区
7. #lvreduce-L100G/dev/mapper/VolGroup-lv_home//释放空间
8. #vgdisplay//查看可用空间大小
9. #lvextend-L+311.47G/dev/mapper/VolGroup-lv_root//扩展lv_root虚拟分区
10. #resize2fs-p/dev/mapper/VolGroup-lv_root//lv_root重设分区大小
11. LVM（逻辑磁盘管理），灵活性很高.

2，详细解决过程

1. [root@localhost~]#df-h
2. FilesystemSizeUsedAvailUse%Mountedon
3. /dev/mapper/VolGroup-lv_root50G47G16M100%///lv_root满了
4. tmpfs1.9G72K1.9G1%/dev/shm
5. /dev/sda1485M40M420M9%/boot
6. /dev/mapper/VolGroup-lv_home406G19G366G5%/home//lv_home空间很多
8. [root@localhost~]#resize2fs-p/dev/mapper/VolGroup-lv_home100G
9. resize2fs1.41.12(17-May-2010)
10. Filesystemat/dev/mapper/VolGroup-lv_homeismountedon/home;on-lineresizingrequired
11. On-lineshrinkingfrom107865088to65536000notsupported.//先umount才能resize2fs
13. [root@localhost~]#umount/home//umounthome目录
15. [root@localhost~]#resize2fs-p/dev/mapper/VolGroup-lv_home100G
16. resize2fs1.41.12(17-May-2010)
17. 请先运行'e2fsck-f/dev/mapper/VolGroup-lv_home'.//提示要先进行磁盘检测
19. [root@localhost~]#e2fsck-f/dev/mapper/VolGroup-lv_home
20. e2fsck1.41.12(17-May-2010)

第一步:检查inode,块,和大小

第二步:检查目录结构

第3步:检查目录连接性

Pass 4:Checking reference counts

第5步:检查簇概要信息

1. /dev/mapper/VolGroup-lv_home:1459/16384000files(4.0%non-contiguous),5914204/65536000blocks
3. [root@localhost~]#resize2fs-p/dev/mapper/VolGroup-lv_home100G//重定大小
4. resize2fs1.41.12(17-May-2010)
5. Resizingthefilesystemon/dev/mapper/VolGroup-lv_hometo26214400(4k)blocks.
6. Beginpass2(max=32768)

正在重定位块 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Begin pass 3 (max = 2000)

正在扫描inode表 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

1. Thefilesystemon/dev/mapper/VolGroup-lv_homeisnow26214400blockslong.
3. [root@localhost~]#mount/home/
5. [root@localhost~]#df-h
6. FilesystemSizeUsedAvailUse%Mountedon
7. /dev/mapper/VolGroup-lv_root50G47G16M100%/
8. tmpfs1.9G72K1.9G1%/dev/shm
9. /dev/sda1485M40M420M9%/boot
10. /dev/mapper/VolGroup-lv_home99G19G75G20%/home
12. [root@localhost~]#lvreduce-L100G/dev/mapper/VolGroup-lv_home//释放空间
13. WARNING:Reducingactiveandopenlogicalvolumeto100.00GiB
14. THISMAYDESTROYYOURDATA(filesystemetc.)
15. Doyoureallywanttoreducelv_home?[y/n]:y
16. Reducinglogicalvolumelv_hometo100.00GiB
17. Logicalvolumelv_homesuccessfullyresized
19. [root@localhost~]#df-h
20. FilesystemSizeUsedAvailUse%Mountedon
21. /dev/mapper/VolGroup-lv_root50G47G16M100%/
22. tmpfs1.9G72K1.9G1%/dev/shm
23. /dev/sda1485M40M420M9%/boot
24. /dev/mapper/VolGroup-lv_home99G19G75G20%/home
26. [root@localhost~]#vgdisplay
27. ---Volumegroup---
28. VGNameVolGroup
29. SystemID
30. Formatlvm2
31. MetadataAreas1
32. MetadataSequenceNo5
33. VGAccessread/write
34. VGStatusresizable
35. MAXLV0
36. CurLV3
37. OpenLV3
38. MaxPV0
39. CurPV1
40. ActPV1
41. VGSize465.27GiB
42. PESize4.00MiB
43. TotalPE119109
44. AllocPE/Size39372/153.80GiB
45. FreePE/Size79737/311.47GiB//空闲空间
46. VGUUIDVt2V4t-Byxs-tQqk-cY0h-IDE3-pabX-LUfkRS
48. [root@localhost~]#lvextend-L+311.47G/dev/mapper/VolGroup-lv_root//空闲空间加入到lv_root
49. Roundingsizetoboundarybetweenphysicalextents:311.47GiB
50. Extendinglogicalvolumelv_rootto361.47GiB
51. Logicalvolumelv_rootsuccessfullyresized
53. [root@localhost~]#resize2fs-p/dev/mapper/VolGroup-lv_root
54. resize2fs1.41.12(17-May-2010)
55. Filesystemat/dev/mapper/VolGroup-lv_rootismountedon/;on-lineresizingrequired
56. olddesc_blocks=4,new_desc_blocks=23//这儿要耐心等待，扩大越多，时间越长
57. Performinganon-lineresizeof/dev/mapper/VolGroup-lv_rootto94757888(4k)blocks.
58. Thefilesystemon/dev/mapper/VolGroup-lv_rootisnow94757888blockslong.
60. [root@localhostopenfire]#df-h
61. FilesystemSizeUsedAvailUse%Mountedon
62. /dev/mapper/VolGroup-lv_root356G48G308G14%/
63. tmpfs1.9G72K1.9G1%/dev/shm
64. /dev/sda1485M40M420M9%/boot
65. /dev/mapper/VolGroup-lv_home99G19G75G20%/home