centos6.5LVM磁盘管理

# fdisk /dev/vda
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
         switch off the mode (command 'c') and change display units to
         sectors (command 'u').

Command (m for help): p

Disk /dev/vda: 536.9 GB, 536870912000 bytes
16 heads, 63 sectors/track, 1040253 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0008e6ec

   Device Boot      Start         End      Blocks   Id  System
/dev/vda1   *           3         409      204800   83  Linux
Partition 1 does not end on cylinder boundary.
/dev/vda2             409      203583   102400000   8e  Linux LVM
Partition 2 does not end on cylinder boundary.
/dev/vda3          203583      205664     1048576   82  Linux swap / Solaris
Partition 3 does not end on cylinder boundary.

Command (m for help): n
Command action
   e   extended
   p   primary partition (1-4)
e
Selected partition 4
First cylinder (1-1040253, default 1): 205665     
Last cylinder, +cylinders or +size{K,M,G} (205665-1040253, default 1040253): 
Using default value 1040253

Command (m for help): p

Disk /dev/vda: 536.9 GB, 536870912000 bytes
16 heads, 63 sectors/track, 1040253 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0008e6ec

   Device Boot      Start         End      Blocks   Id  System
/dev/vda1   *           3         409      204800   83  Linux
Partition 1 does not end on cylinder boundary.
/dev/vda2             409      203583   102400000   8e  Linux LVM
Partition 2 does not end on cylinder boundary.
/dev/vda3          203583      205664     1048576   82  Linux swap / Solaris
Partition 3 does not end on cylinder boundary.
/dev/vda4          205665     1040253   420632856    5  Extended

Command (m for help):n
First cylinder (205665-1040253, default 205665): 
Using default value 205665
Last cylinder, +cylinders or +size{K,M,G} (205665-1040253, default 1040253): +10G

Command (m for help): n
First cylinder (226471-1040253, default 226471): 
Using default value 226471
Last cylinder, +cylinders or +size{K,M,G} (226471-1040253, default 1040253): +10G

Command (m for help): t
Partition number (1-6): 5
Hex code (type L to list codes): L

 0  Empty           24  NEC DOS         81  Minix / old Lin bf  Solaris        
 1  FAT12           39  Plan 9          82  Linux swap / So c1  DRDOS/sec (FAT-
 2  XENIX root      3c  PartitionMagic  83  Linux           c4  DRDOS/sec (FAT-
 3  XENIX usr       40  Venix 80286     84  OS/2 hidden C:  c6  DRDOS/sec (FAT-
 4  FAT16 <32M      41  PPC PReP Boot   85  Linux extended  c7  Syrinx         
 5  Extended        42  SFS             86  NTFS volume set da  Non-FS data    
 6  FAT16           4d  QNX4.x          87  NTFS volume set db  CP/M / CTOS / .
 7  HPFS/NTFS       4e  QNX4.x 2nd part 88  Linux plaintext de  Dell Utility   
 8  AIX             4f  QNX4.x 3rd part 8e  Linux LVM       df  BootIt         
 9  AIX bootable    50  OnTrack DM      93  Amoeba          e1  DOS access     
 a  OS/2 Boot Manag 51  OnTrack DM6 Aux 94  Amoeba BBT      e3  DOS R/O        
 b  W95 FAT32       52  CP/M            9f  BSD/OS          e4  SpeedStor      
 c  W95 FAT32 (LBA) 53  OnTrack DM6 Aux a0  IBM Thinkpad hi eb  BeOS fs        
 e  W95 FAT16 (LBA) 54  OnTrackDM6      a5  FreeBSD         ee  GPT            
 f  W95 Ext'd (LBA) 55  EZ-Drive        a6  OpenBSD         ef  EFI (FAT-12/16/
10  OPUS            56  Golden Bow      a7  NeXTSTEP        f0  Linux/PA-RISC b
11  Hidden FAT12    5c  Priam Edisk     a8  Darwin UFS      f1  SpeedStor      
12  Compaq diagnost 61  SpeedStor       a9  NetBSD          f4  SpeedStor      
14  Hidden FAT16 <3 63  GNU HURD or Sys ab  Darwin boot     f2  DOS secondary  
16  Hidden FAT16    64  Novell Netware  af  HFS / HFS+      fb  VMware VMFS    
17  Hidden HPFS/NTF 65  Novell Netware  b7  BSDI fs         fc  VMware VMKCORE 
18  AST SmartSleep  70  DiskSecure Mult b8  BSDI swap       fd  Linux raid auto
1b  Hidden W95 FAT3 75  PC/IX           bb  Boot Wizard hid fe  LANstep        
1c  Hidden W95 FAT3 80  Old Minix       be  Solaris boot    ff  BBT            
1e  Hidden W95 FAT1
Hex code (type L to list codes): 8e
Changed system type of partition 5 to 8e (Linux LVM)

Command (m for help): t
Partition number (1-6): 6
Hex code (type L to list codes): 8e
Changed system type of partition 6 to 8e (Linux LVM)

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.

WARNING: Re-reading the partition table failed with error 16: 设备或资源忙.
The kernel still uses the old table. The new table will be used at
the next reboot or after you run partprobe(8) or kpartx(8)
Syncing disks.
------------------------------------------
# ll /dev/vda*
brw-rw---- 1 root disk 252, 0  5月  6 11:31 /dev/vda
brw-rw---- 1 root disk 252, 1  5月  6 09:36 /dev/vda1
brw-rw---- 1 root disk 252, 2  5月  6 09:36 /dev/vda2
brw-rw---- 1 root disk 252, 3  5月  6 09:36 /dev/vda3
[root@upl43 ~]# partx -a /dev/vda
BLKPG: Device or resource busy
error adding partition 1
BLKPG: Device or resource busy
error adding partition 2
BLKPG: Device or resource busy
error adding partition 3
[root@upl43 ~]# ll /dev/vda*
brw-rw---- 1 root disk 252, 0  5月  6 11:31 /dev/vda
brw-rw---- 1 root disk 252, 1  5月  6 09:36 /dev/vda1
brw-rw---- 1 root disk 252, 2  5月  6 09:36 /dev/vda2
brw-rw---- 1 root disk 252, 3  5月  6 09:36 /dev/vda3
brw-rw---- 1 root disk 252, 4  5月  6 11:32 /dev/vda4
brw-rw---- 1 root disk 252, 5  5月  6 11:32 /dev/vda5
brw-rw---- 1 root disk 252, 6  5月  6 11:32 /dev/vda6

# pvcreate /dev/vda[5-6]  
  Physical volume "/dev/vda5" successfully created
  Physical volume "/dev/vda6" successfully created
# pvdisplay | less
# pvsv

#vgcreate miantuan /dev/vda[5-6]     
  Volume group "miantuan" successfully created
# vgdisplay | less
# vgs

# lvcreate -n jiaozi -L +200M miantuan
  Logical volume "jiaozi" created
# lvcreate -n jiaozi -L +200M miantuan
  Logical volume "jiaozi" created
[root@upl43 ~]# lvcreate -n baozi -L +400M miantuan
  Logical volume "baozi" created
[root@upl43 ~]# lvcreate -n youtiao -L +400M miantuan
  Logical volume "youtiao" created
lvs
  LV      VG       Attr   LSize   Origin Snap%  Move Log Copy%  Convert
  baozi   miantuan -wi-ao 400.00m                                      
  jiaozi  miantuan -wi-ao 200.00m                                      
  youtiao miantuan -wi-ao 400.00m  	

   25  mkfs.ext4 /dev/miantuan/jiaozi 
   26  mkfs.ext4 /dev/miantuan/baozi 
   27  mkfs.ext4 /dev/miantuan/youtiao 
   28  mkdir /mnt/youtiao
   29  mkdir /mnt/baozi
   30  mkdir /mnt/jiaozi
   31  mount /dev/mapper/miantuan-youtiao /mnt/youtiao/
   32  mount -t ext4 /dev/miantuan/baozi /mnt/baozi/
   33  mount /dev/miantuan/jiaozi /mnt/jiaozi/

在线扩容：
# lvextend -L +100M /dev/miantuan/baozi   --扩容  (住:+100M实在原来的基础上加100M.100M就是直接加到100M)
# resize2fs /dev/miantuan/baozi 	--刷新youtiao的容量
# df -h		--查看是否成功

７.缩小容量：
[root@upl43 ~]# umount /mnt/youtiao/
[root@upl43 ~]# e2fsck -f /dev/miantuan/youtiao 
e2fsck 1.41.12 (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
/dev/miantuan/youtiao: 11/102400 files (0.0% non-contiguous), 23438/409600 blocks
[root@upl43 ~]# echo $?
0
[root@upl43 ~]# resize2fs /dev/miantuan/youtiao 200M
resize2fs 1.41.12 (17-May-2010)
Resizing the filesystem on /dev/miantuan/youtiao to 204800 (1k) blocks.
The filesystem on /dev/miantuan/youtiao is now 204800 blocks long.

[root@upl43 ~]# lvreduce -L 200M /dev/miantuan/youtiao 
  WARNING: Reducing active logical volume to 200.00 MiB
  THIS MAY DESTROY YOUR DATA (filesystem etc.)
Do you really want to reduce youtiao? [y/n]: y
  Reducing logical volume youtiao to 200.00 MiB
  Logical volume youtiao successfully resized
[root@upl43 ~]# mount /dev/miantuan/youtiao /mnt/youtiao/

使用PE
# lvcreate -n mianbao -l 50 miantuan
# mkfs.ext4 /dev/miantuan/mianbao 
# mkdir /mnt/mianbao
# mount /dev/miantuan/mianbao /mnt/mianbao/

---------------------------------------------------------------------------------------------------------------
删除

1. 卸载
umount /dev/miantuan/youtiao 
[root@upl43 ~]# umount /dev/miantuan/baozi 
[root@upl43 ~]# umount /dev/miantuan/jiaozi 
[root@upl43 ~]# umount /dev/miantuan/mianbao 
[root@upl43 ~]# df -h
文件系统	      容量  已用  可用 已用%% 挂载点
/dev/mapper/vol0-root
                       39G  2.6G   34G   7% /
tmpfs                 246M  260K  246M   1% /dev/shm
/dev/vda1             194M   58M  127M  32% /boot
/dev/mapper/vol0-home
                      504M   17M  462M   4% /home

2.删除LV
# lvs
  LV      VG       Attr   LSize   Origin Snap%  Move Log Copy%  Convert
  baozi   miantuan -wi-a- 500.00m                                      
  jiaozi  miantuan -wi-a- 200.00m                                      
  mianbao miantuan -wi-a- 200.00m                                      
  rhel6   miantuan -wi-a-   2.00g                                      
  youtiao miantuan -wi-a- 200.00m                                      
  home    vol0     -wi-ao 512.00m                                      
  root    vol0     -wi-ao  39.06g                                      
[root@upl43 ~]# lv
lvchange     lvdisplay    lvmchange    lvmdump      lvreduce     lvresize
lvconvert    lvextend     lvmconf      lvmsadc      lvremove     lvs
lvcreate     lvm          lvmdiskscan  lvmsar       lvrename     lvscan
[root@upl43 ~]# lvremove /dev/miantuan/baozi 
Do you really want to remove active logical volume baozi? [y/n]: y
  Logical volume "baozi" successfully removed

-------------------------------------
[root@upl43 ~]# lvreduce /dev/miantuan/jlvreduciaozi  
  Please specify either size or extents but not both.
  Run `lvreduce --help' for more information.
-----------------------------------------

[root@upl43 ~]# lvremove /dev/miantuan/jiaozi 
Do you really want to remove active logical volume jiaozi? [y/n]: y
  Logical volume "jiaozi" successfully removed
[root@upl43 ~]# lvremove /dev/miantuan/mianbao 
Do you really want to remove active logical volume mianbao? [y/n]: y
  Logical volume "mianbao" successfully removed
[root@upl43 ~]# lvremove /dev/miantuan/rhel6 
Do you really want to remove active logical volume rhel6? [y/n]: y
  Logical volume "rhel6" successfully removed
[root@upl43 ~]# lvremove /dev/miantuan/youtiao 
Do you really want to remove active logical volume youtiao? [y/n]: y
  Logical volume "youtiao" successfully removed

# vgremove /dev/vda[5-6] miantuan
  Volume group "vda5" not found
  Volume group "vda6" not found
  Volume group "miantuan" successfully removed

# pvremove /dev/vda[5-6]
  Labels on physical volume "/dev/vda5" successfully wiped
  Labels on physical volume "/dev/vda6" successfully wiped

# pvs
  PV         VG   Fmt  Attr PSize  PFree 
  /dev/vda2  vol0 lvm2 a-   97.62g 58.06g

[root@upl43 ~]# fdisk /dev/vda

WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
         switch off the mode (command 'c') and change display units to
         sectors (command 'u').

Command (m for help): p

Disk /dev/vda: 536.9 GB, 536870912000 bytes
16 heads, 63 sectors/track, 1040253 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0008e6ec

   Device Boot      Start         End      Blocks   Id  System
/dev/vda1   *           3         409      204800   83  Linux
Partition 1 does not end on cylinder boundary.
/dev/vda2             409      203583   102400000   8e  Linux LVM
Partition 2 does not end on cylinder boundary.
/dev/vda3          203583      205664     1048576   82  Linux swap / Solaris
Partition 3 does not end on cylinder boundary.
/dev/vda4          205665     1040253   420632856    5  Extended
/dev/vda5          205665      226470    10486192+  8e  Linux LVM
/dev/vda6          226471      247276    10486192+  8e  Linux LVM

Command (m for help): d
Partition number (1-6): 6

Command (m for help): d
Partition number (1-5): 5

Command (m for help): p

Disk /dev/vda: 536.9 GB, 536870912000 bytes
16 heads, 63 sectors/track, 1040253 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0008e6ec

   Device Boot      Start         End      Blocks   Id  System
/dev/vda1   *           3         409      204800   83  Linux
Partition 1 does not end on cylinder boundary.
/dev/vda2             409      203583   102400000   8e  Linux LVM
Partition 2 does not end on cylinder boundary.
/dev/vda3          203583      205664     1048576   82  Linux swap / Solaris
Partition 3 does not end on cylinder boundary.
/dev/vda4          205665     1040253   420632856    5  Extended

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.

WARNING: Re-reading the partition table failed with error 16: 设备或资源忙.
The kernel still uses the old table. The new table will be used at
the next reboot or after you run partprobe(8) or kpartx(8)
Syncing disks.