[root@data4 ~]
# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/rootvg-lv01
99G 90G 3.4G 97% /
<==给根目录扩容400G硬盘
tmpfs 4.9G 0 4.9G 0% /dev/shm
/dev/sda1 190M 39M 142M 22% /boot
第一步、给VMware虚拟机增加一块400G磁盘
第二步、使用Linux下的fdisk工具进行分区
使用 fdisk 命令可以查看到刚刚新增的一块400G硬盘
[root@data4 ~]
# fdisk -l
Disk /dev/sda: 100 GB, 536870912000 bytes
255 heads, 63 sectors/track, 65270 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0003f73f
Device Boot Start End Blocks Id System
/dev/sda1 * 1 26 204800 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 26 13055 104651776 8e Linux LVM
Disk /dev/sdb: 400 GB, 429496729600 bytes
255 heads, 63 sectors/track, 52216 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x46d25589
Disk /dev/mapper/rootvg-lv01: 107.1 GB, 107139301376 bytes
255 heads, 63 sectors/track, 13025 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
使用 fdisk 命令进行磁盘分区
fdisk /dev/sdc
n
p
1
回车
回车
w
partprobe /dev/sdb
mkfs
-t
ext4 /dev/sdb1
查看分区情况
[root@data4 ~]
# fdisk -l
Disk /dev/sda: 100 GB, 536870912000 bytes
255 heads, 63 sectors/track, 65270 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0003f73f
Device Boot Start End Blocks Id System
/dev/sda1 * 1 26 204800 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 26 13055 104651776 8e Linux LVM
Disk /dev/sdb: 400 GB, 429496729600 bytes
255 heads, 63 sectors/track, 52216 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x46d25589
Device Boot Start End Blocks Id System
/dev/sdb1 1 52216 419424988+ 83
Linux
Disk /dev/mapper/rootvg-lv01: 107.1 GB, 107139301376 bytes
255 heads, 63 sectors/track, 13025 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
我们的新建分区/dev/sdb1，却不是LVM的。所以，接下来使用fdisk将其改成LVM的
fdisk /dev/sdb
Command (m for help): m
Command (m for help): t //改变分区系统id
Partition number (1-4): 3 //指定分区号
Hex code (
type
L to list codes): 8e //指定要改成的id号，8e代表LVM。
Command (m for help): w
mkfs
-t
ext4 /dev/sdb1
我们现在还不能用这个分区 , 因为我们没格式化。这时要重启系统就能够在 dev 下面看到 sdb1 ，如果不重启不能进行下面操作。
重启后，在此查看fdisk -l
重启后，在此查看fdisk -l
[root@data4 ~]
# fdisk -l
Disk /dev/sda: 100 GB, 536870912000 bytes
255 heads, 63 sectors/track, 65270 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0003f73f
Device Boot Start End Blocks Id System
/dev/sda1 * 1 26 204800 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 26 13055 104651776 8e Linux LVM
Disk /dev/sdb: 400 GB, 429496729600 bytes
255 heads, 63 sectors/track, 52216 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x46d25589
Device Boot Start End Blocks Id System
/dev/sdb1 1 52216 419424988+ 8e
Linux LVM
Disk /dev/mapper/rootvg-lv01: 535.6 GB, 535562289152 bytes
255 heads, 63 sectors/track, 65111 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
第三步、扩充根分区
接着，使用vgextend 命令加到lvm组里面去，做如下操作：
[root@data4 ~]
# lvs
LV VG Attr LSize Pool Origin Data% Meta%
Move
Log Cpy
%
Sync Convert
lv01 rootvg
-wi
-ao
---- 99.78g
[root@data4 ~]
# pvcreate /dev/sdb1
Physical volume
"/dev/sdb1"
successfully created
[root@data4 ~]
# vgextend rootvg /dev/sdb1
Volume
group
"rootvg"
successfully extended
[root@data4 ~]
# vgdisplay
--- Volume
group
---
VG Name rootvg
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 3
VG Access read/
write
VG Status resizable
MAX LV 0
Cur LV 1
Open LV 1
Max PV 0
Cur PV 2
Act PV 2
VG Size 499.75 GiB
PE Size 32.00 MiB
Total PE 15992
Alloc PE / Size 3193 / 99.78 GiB
Free PE / Size 12799 /
399.97 GiB
VG UUID b6ceOL-4U9q-3DyS-p8VV
-WKvC
-dAEp
-nuFws7
最后，给根分区增加空间
[root@data4 ~]
# lvextend -L +399G /dev/rootvg/lv01 /dev/sdb1
Size of logical volume rootvg/lv01 changed from 99.78 GiB (3193 extents) to 498.78 GiB (15961 extents).
Logical volume lv01 successfully resized.
使用e2fsck指令检查文件系统错误
[root@data4 ~]
# e2fsck -f /dev/mapper/rootvg-lv01
resize2fs指令被用来增大或者收缩未加载的“ext2/ext3”文件系统的大小
[root@data4 ~]
# resize2fs /dev/mapper/rootvg-lv01
resize2fs 1.41.1
2 (17
-May
-2010)
Filesystem at /dev/mapper/rootvg-lv01 is mounted on /; on
-line
resizing required
old desc_blocks = 7, new_desc_blocks = 32
Performing an on
-line
resize of /dev/mapper/rootvg-lv01 to 130752512 (4k) blocks.
<==需要耐心等待一段时间
The filesystem on /dev/mapper/rootvg-lv01 is now 130752512 blocks long.
再次使用df -f命令查看/根目录以及成功扩展了400G容量
[root@data4 ~]
# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/rootvg-lv01
491G 90G 377G 20% /
tmpfs 4.9G 0 4.9G 0% /dev/shm
/dev/sda1 190M 39M 142M 22% /boot
参考文献：
实战Linux下VMware虚拟机根目录空间扩充 http://blog.csdn.net/snlying/article/details/6184428
VMware 虚拟机（linux）增加根目录磁盘空间 http://zhongxw.blog.51cto.com/3429597/787219/