虚拟机添加磁盘LVM分区

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参考博客：http://kimjinlsgd.blog.51cto.com/1918030/932210

一、查看磁盘情况

新添加一块磁盘。

[root@VMhost /]# fdisk -l

Disk /dev/sda: 12.8 GB, 12884901888 bytes
255 heads, 63 sectors/track, 1566 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda2 14 1566 12474472+ 8e Linux LVM

Disk /dev/sdb: 11.2 GB, 11280916480 bytes
255 heads, 63 sectors/track, 1371 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Disk /dev/sdb doesn't contain a valid partition table

二、格式化磁盘

[root@VMhost /]# fdisk /dev/sdb
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel. Changes will remain in memory only,
until you decide to write them. After that, of course, the previous
content won't be recoverable.

The number of cylinders for this disk is set to 1371.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs
(e.g., DOS FDISK, OS/2 FDISK)
Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)

Command (m for help): n --添加新分区
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-1371, default 1):
Using default value 1
Last cylinder or +size or +sizeM or +sizeK (1-1371, default 1371):
Using default value 1371

Command (m for help): t --指定分区的格式
Selected partition 1
Hex code (type L to list codes): 8e
Changed system type of partition 1 to 8e (Linux LVM)

Command (m for help): p

Disk /dev/sdb: 11.2 GB, 11280916480 bytes
255 heads, 63 sectors/track, 1371 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sdb1 1 1371 11012526 8e Linux LVM

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

Calling ioctl() to re-read partition table.
Syncing disks.

三、分区挂载

[root@VMhost ~]# lvm

lvm> pvcreate /dev/sdb1
Writing physical volume data to disk "/dev/sdb1"
Physical volume "/dev/sdb1" successfully created
lvm> vgextend VolGroup00 /dev/sdb1
Volume group "VolGroup00" successfully extended

lvm> pvdisplay
--- Physical volume ---
PV Name /dev/sda2
VG Name VolGroup00
PV Size 11.90 GB / not usable 22.10 MB
Allocatable yes (but full)
PE Size (KByte) 32768
Total PE 380
Free PE 0
Allocated PE 380
PV UUID nwXal0-oUy4-m73q-mvTE-XJ0F-9LI5-BVm2W8

--- Physical volume ---
PV Name /dev/sdb1
VG Name VolGroup00
PV Size 10.50 GB / not usable 2.42 MB
Allocatable yes
PE Size (KByte) 32768
Total PE 336
Free PE 336
Allocated PE 0
PV UUID THT3Vd-Odrb-5J3r-C4Mx-TS3K-EAhe-oRl1rA

[root@VMhost ~]# lvm
lvm> lvdisplay
--- Logical volume ---
LV Name /dev/VolGroup00/LogVol00
VG Name VolGroup00
LV UUID baqpCg-u9O6-KWeW-mOPC-4lME-MLpn-1DUt5D
LV Write Access read/write
LV Status available
# open 1
LV Size 7.94 GB
Current LE 254
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0

--- Logical volume ---
LV Name /dev/VolGroup00/LogVol01
VG Name VolGroup00
LV UUID JbJcil-wefD-W1xQ-iBXd-FUUc-sL0l-ZGpdKl
LV Write Access read/write
LV Status available
# open 1
LV Size 3.94 GB
Current LE 126
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:1

lvm> lvextend -L +10G /dev/VolGroup00/LogVol00
Extending logical volume LogVol00 to 17.94 GB
Logical volume LogVol00 successfully resized
lvm> exit
Exiting.
[root@VMhost ~]# resize2fs /dev/VolGroup00/LogVol00
resize2fs 1.39 (29-May-2006)
Filesystem at /dev/VolGroup00/LogVol00 is mounted on /; on-line resizing required
Performing an on-line resize of /dev/VolGroup00/LogVol00 to 4702208 (4k) blocks.
The filesystem on /dev/VolGroup00/LogVol00 is now 4702208 blocks long.

[root@VMhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
18G 3.5G 14G 21% /
/dev/sda1 99M 22M 72M 24% /boot
tmpfs 1007M 0 1007M 0% /dev/shm
[root@VMhost ~]# fdisk -l

Disk /dev/sda: 12.8 GB, 12884901888 bytes
255 heads, 63 sectors/track, 1566 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda2 14 1566 12474472+ 8e Linux LVM

Disk /dev/sdb: 11.2 GB, 11280916480 bytes
255 heads, 63 sectors/track, 1371 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sdb1 1 1371 11012526 8e Linux LVM

Disk /dev/dm-0: 19.2 GB, 19260243968 bytes
255 heads, 63 sectors/track, 2341 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Disk /dev/dm-0 doesn't contain a valid partition table

Disk /dev/dm-1: 4227 MB, 4227858432 bytes
255 heads, 63 sectors/track, 514 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Disk /dev/dm-1 doesn't contain a valid partition table
[root@VMhost ~]# lvm
lvm> lvdisplay
--- Logical volume ---
LV Name /dev/VolGroup00/LogVol00
VG Name VolGroup00
LV UUID baqpCg-u9O6-KWeW-mOPC-4lME-MLpn-1DUt5D
LV Write Access read/write
LV Status available
# open 1
LV Size 17.94 GB
Current LE 574
Segments 2
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0