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SSH登陸後，檢視現有分割槽、掛載及swap情況：
可以看到大概8G的硬碟空間分佈情況
1. df -hal
2. free -m
複製程式碼
[root@XenSystem ~]# df -hal
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
5.7G 1.1G 4.4G 20% /
proc 0 0 0 - /proc
sysfs 0 0 0 - /sys
devpts 0 0 0 - /dev/pts
/dev/xvda1 99M 27M 67M 29% /boot
tmpfs 257M 0 257M 0% /dev/shm
none 0 0 0 - /proc/sys/fs/binfmt_misc
sunrpc 0 0 0 - /var/lib/nfs/rpc_pipefs
[root@XenSystem~]# free -m
total
used free
shared buffers cached
Mem: 512
506 5
0
447 9
-/+ buffers/cache: 49
463
Swap: 2079
0 2079
檢視硬碟裝置列表：
1. fdisk -l
複製程式碼
Disk /dev/xvdb: 23.6 GB, 23622320128 bytes
255 heads, 63 sectors/track, 2871 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk /dev/xvdb doesn't contain a valid partition table
Disk /dev/xvda: 8589 MB, 8589934592 bytes
255 heads, 63 sectors/track, 1044 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start
End Blocks
Id System
/dev/xvda1 *
1 13
104391 83 Linux
/dev/xvda2
14 1044
8281507+ 8e Linux LVM
re
硬碟/dev/xvdb尚未劃分使用，接下來我們為dev/xvdb分割槽
1. fdisk
/dev/xvdb
複製程式碼
[root@XenSystem ~]# fdisk /dev/xvdb
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 2871.
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)
#輸入n，新建分割槽
Command (m for help): n
#輸入P，主分割槽
Command action
e extended
p primary partition (1-4)
p
#目前是xvdb第一個分割槽輸入1
Partition number (1-4): 1
#敲回車，預設就行了
First cylinder (1-2871, default 1):
Using default value 1
Last cylinder or +size or +sizeM or +sizeK (1-2871, default 2871):
Using default value 2871
#這裡輸入t，指定分割槽的格式為8e (LVM)
Command (m for help): t
Selected partition 1
Hex code (type L to list codes): 8e
Changed system type of partition 1 to 8e
(Linux LVM)
#這裡輸入w，儲存退出
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
重啟使其生效
1. reboot
複製程式碼
重啟後，再次執行fdisk -l，可看到我們劃分的xvdb1已經生效了
[root@XenSystem]# fdisk -l
Disk /dev/xvdb: 23.6 GB, 23622320128 bytes
255 heads, 63 sectors/track, 2871 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/xvdb1 1 2871 23061276 8e Linux LVM
Disk /dev/xvda: 8589 MB, 8589934592 bytes
255 heads, 63 sectors/track, 1044 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/xvda1 * 1 13 104391 83 Linux
/dev/xvda2 14 1044 8281507+ 8e Linux LVM
執行vgs檢視卷組情況，可以看到只有一個卷組VolGroup00（此名稱因系統而異）
1. vgs
複製程式碼
[root@XenSystem ~]# vgs
VG #PV #LV #SN Attr VSize VFree
VolGroup00 2 2 0 wz--n- 49.84G 0
建立物理卷，並將物理卷加入到組VolGroup00（此名稱因系統而異）
1. pvcreate
/dev/xvdb1
2. vgextend
VolGroup00 /dev/xvdb1
複製程式碼
[root@XenSystem~]# pvcreate /dev/xvdb1
Physical volume "/dev/xvdb1" successfully created
[root@XenSystem~]# vgextend VolGroup00 /dev/xvdb1
Volume group "VolGroup00" successfully extended
執行vgdisplay檢視卷組空間情況
1. vgdisplay
複製程式碼
[root@XenSystem~]# vgdisplay
--- Volume group ---
VG Name
VolGroup00
System ID
Format
lvm2
Metadata Areas 2
Metadata Sequence No 4
VG Access
read/write
VG Status
resizable
MAX LV
0
Cur LV
2
Open LV
2
Max PV
0
Cur PV
2
Act PV
2
VG Size
29.84 GB
PE Size
32.00 MB
Total PE
955
Alloc PE / Size 252 / 7.88 GB
Free PE / Size 703 / 21.97 GB
VG UUID
jWlke0-R01B-RqBP-Qp1X-xxi0-ltOI-FompAt
可以看到大概有21.97G的空間可以擴充使用，我們將卷組下的卷LogVol00擴容21.96G
1. lvresize -L
+21.96G /dev/VolGroup00/LogVol00
2. resize2fs
/dev/VolGroup00/LogVol00
複製程式碼
[root@XenSystem~]# lvresize -L +21.96G /dev/VolGroup00/LogVol00
Rounding up size to full physical extent 21.97 GB
Extending logical volume LogVol00 to 27.81 GB
Logical volume LogVol00 successfully resized
[root@XenSystem~]# resize2fs /dev/VolGroup00/LogVol00
resize2fs 1.39 (29-May-2006)
Filesystem at /dev/VolGroup00/LogVol00 is mounted on /; on-line resizing
require d
Performing an on-line resize of /dev/VolGroup00/LogVol00 to 7290880 (4k)
blocks.
The filesystem on /dev/VolGroup00/LogVol00 is now 7290880 blocks long.
執行完成後，我們可以持到相應的空間已經擴充套件出來可以使用了
[root@XenSystem~]# df -hal
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
27G 1.1G 25G 5% /
proc 0 0 0 - /proc
sysfs 0 0 0 - /sys
devpts 0 0 0 - /dev/pts
/dev/xvda1 99M 27M 67M 29% /boot
tmpfs 257M 0 257M 0% /dev/shm
none 0 0 0 - /proc/sys/fs/binfmt_misc
sunrpc 0 0 0 - /var/lib/nfs/rpc_pipefs
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