擴展後執行fdisk -l查看是否成功
[root@localhost ~ ]# fdisk - l
Disk / dev / sda: 16.1 GB, 16106127360 bytes
255 heads, 63 sectors / track, 1958 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/ dev / sda1 * 1 6 48163 + 83 Linux
/ dev / sda2 7 515 4088542 + 83 Linux
/ dev / sda3 516 1239 5815530 83 Linux
/ dev / sda4 1240 1305 530145 5 Extended
/ dev / sda5 1240 1305 530113 + 82 Linux swap / Solaris
Disk / dev / sda: 16.1 GB, 16106127360 bytes
255 heads, 63 sectors / track, 1958 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/ dev / sda1 * 1 6 48163 + 83 Linux
/ dev / sda2 7 515 4088542 + 83 Linux
/ dev / sda3 516 1239 5815530 83 Linux
/ dev / sda4 1240 1305 530145 5 Extended
/ dev / sda5 1240 1305 530113 + 82 Linux swap / Solaris
可見sda已經擴展成爲16G，但是沒分配給文件系統
繼續執行fdisk /dev/sda進行新建磁盤
[root@localhost ~ ]# fdisk / dev / sda
The number of cylinders for this disk is set to 1958 .
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)
Command (m for help): n
No free sectors available
The number of cylinders for this disk is set to 1958 .
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)
Command (m for help): n
No free sectors available
前面執行fdisk -l的時候明明最後纔是1305柱面，而且應該有1958柱面，爲什麼說沒有空閒的扇區。
再看看fdisk -l執行結果，原來是/dev/sda5分配了作爲swap分區，找到原因了就容易解決。
1.關閉swap分區 # swapoff /dev/sda5
2.刪除sda4和sda5.
[root@localhost ~ ]# fdisk / dev / sda
The number of cylinders for this disk is set to 1958 .
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)
Command (m for help): d
Partition number ( 1 - 5 ): 5
Command (m for help): d
Partition number ( 1 - 5 ): 4
The number of cylinders for this disk is set to 1958 .
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)
Command (m for help): d
Partition number ( 1 - 5 ): 5
Command (m for help): d
Partition number ( 1 - 5 ): 4
3.建立擴展分區4，建立分區sda5，寫入
Command (m for help): n
Command action
e extended
p primary partition ( 1 - 4 )
e
Selected partition 4
First cylinder ( 1240 - 1958 , default 1240 ):
Using default value 1240
Last cylinder or + size or + sizeM or + sizeK ( 1240 - 1958 , default 1958 ):
Using default value 1958
Command (m for help): n
First cylinder ( 1240 - 1958 , default 1240 ):
Using default value 1240
Last cylinder or + size or + sizeM or + sizeK ( 1240 - 1958 , default 1958 ):
Using default value 1958
Command (m for help): w
The partition table has been altered !
Command action
e extended
p primary partition ( 1 - 4 )
e
Selected partition 4
First cylinder ( 1240 - 1958 , default 1240 ):
Using default value 1240
Last cylinder or + size or + sizeM or + sizeK ( 1240 - 1958 , default 1958 ):
Using default value 1958
Command (m for help): n
First cylinder ( 1240 - 1958 , default 1240 ):
Using default value 1240
Last cylinder or + size or + sizeM or + sizeK ( 1240 - 1958 , default 1958 ):
Using default value 1958
Command (m for help): w
The partition table has been altered !
其他擴容繼續參照網上的教程。