轉載：https://blog.csdn.net/kobe24shou/article/details/38374409

E:\VirtualBox>VBoxManage list hdds    首先獲取要擴容的虛擬機器的 UUID

UUID:           a6018b56-dda9-4e92-b2d7-666622cc7fc3

Parent UUID:    base

State:          locked write

Type:           normal (base)

Location:       E:\ls\ls1.vdi

Storage format: VDI

Capacity:       20480 MBytes

E:\VirtualBox>VBoxManage modifyhda6018b56-dda9-4e92-b2d7-666622cc7fc3  --resize 25600     （由20480 擴容到 25600）

0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100%

剛開始結果：

[[email protected] ~]# df -h

Filesystem           Size  Used Avail Use% Mounted on

/dev/mapper/VolGroup00-LogVol00

                      16G   15G  283M  99% /

/dev/sda1             99M   23M   71M  25% /boot

tmpfs                1.1G     0  1.1G   0% /dev/shm

[[email protected] ~]# fdisk -l

Disk /dev/sda: 26.8 GB, 26843545600 bytes

255 heads, 63 sectors/track, 3263 cylinders

Units = cylinders of 16065 * 512 = 8225280bytes

   DeviceBoot     Start        End      Blocks   Id  System

/dev/sda1  *          1         13      104391   83  Linux

/dev/sda2             14        2610   20860402+  8e  Linux LVM

這個時候只是容量從20G擴充到25G,但還不能使用

將空餘磁碟建立為 sda3

# fdisk /dev/sda  （依次輸入 n p 3 t 3 8e w ）

  n{new partition}

  p{primary partition}

  3{partition number}

  t{change partition id}

  3 {partitionnumber}

  8e{Linux LVM partition}

  w

[[email protected] ~]# reboot

檢視一下：

[[email protected] ~]# fdisk -l /dev/sda

Disk /dev/sda: 26.8 GB, 26843545600 bytes

255 heads, 63 sectors/track, 3263 cylinders

Units = cylinders of 16065 * 512 = 8225280bytes

   DeviceBoot     Start        End      Blocks   Id  System

/dev/sda1  *          1         13      104391   83  Linux

/dev/sda2             14        2610   20860402+  8e  Linux LVM

/dev/sda3           2611        3263    5245222+  8e  Linux LVM

調整 LVM 大小先看看當前 Volume Group：

 [[email protected]~]# vgdisplay

  ---Volume group ---

  VGName               VolGroup00

 System ID            

 Format                lvm2

 Metadata Areas        2

 Metadata Sequence No  5

  VGAccess             read/write

  VGStatus             resizable

  MAXLV                0

  CurLV                2

 Open LV               2

  MaxPV                0

  CurPV                2

  ActPV                2

  VGSize              19.88 GB

  PESize               32.00 MB

 Total PE              796

 Alloc PE / Size       796 / 24.88GB

 Free  PE / Size       0 / 0  

  VGUUID               pjf0p4-myx5-QbxW-XK3X-rUFT-jSBS-4uub4T

名稱為 VolGroup00，可調整大小（resizable），當前大小為19.88 GB。

活動的 LVM 卷有，

[[email protected] ~]# lvscan 

ACTIVE     '/dev/VolGroup00/LogVol00 '[15.91GB] inherit 

ACTIVE           '/dev/VolGroup00/LogVol01' [3.97 GB] inherit

先將分配過來的新磁碟空間建立為一個新的物理卷，

[[email protected] ~]# pvcreate /dev/sda3 

Physical volume "/dev/sda3"successfully created

然後使用新的物理捲來擴充套件 LVM 的 VolGroup00

vgextend VolGroup00 /dev/sda3

[[email protected] ~]# vgextend VolGroup00 /dev/sda3
  Volume group "VolGroup00" successfully extended
然後擴充套件 LVM 的邏輯卷 VolGroup00/LogVol00
[[email protected] ~]# lvextend /dev/VolGroup00/LogVol00 /dev/sda3
  Extending logical volume LogVol00 to 20.91 GB
  Logical volume LogVol00 successfully resized
最後，調整邏輯卷檔案系統的大小，
[[email protected] ~]# resize2fs  /dev/VolGroup00/LogVol00
resize2fs 1.39 (29-May-2006)
Filesystem at /dev/VolGroup00/LogVol00 is mounted on /; on-line resizingrequired
Performing an on-line resize of /dev/VolGroup00/LogVol00 to 5480448 (4k)blocks.
The filesystem on /dev/VolGroup00/LogVol00 is now 5480448 blocks long.

完成。看看效果：
[[email protected] ~]# lvscan
  ACTIVE           '/dev/VolGroup00/LogVol00' [20.91 GB] inherit
  ACTIVE           '/dev/VolGroup00/LogVol01' [3.97 GB] inheri

 

另外，幾個有用的 LVM 指令（lvm2）：

• lvmdiskscan
• vgdisplay
• pvdisplay
• lvdispay
• vgcreate
• pvcreate
• lvscan
• pvscan
• vgscan

最後結果：
[[email protected] ~]# df -h
Filesystem           Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
                      21G   15G  4.9G  75% /
/dev/sda1             99M   23M   71M  25% /boot
tmpfs                1.1G     0  1.1G   0% /dev/shm