Linux扩容时新建分区报错No free sectors available

扩展后执行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

可见sda已经扩展成为16G，但是没分配给文件系统
继续执行fdisk /dev/sda进行新建磁盘

[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

前面执行fdisk -l的时候明明最后才是1305柱面，而且应该有1958柱面，为什么说没有空闲的扇区。

再看看fdisk -l执行结果，原来是/dev/sda5分配了作为swap分区，找到原因了就容易解决。

1.关闭swap分区 # swapoff /dev/sda5
2.删除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 

3.建立扩展分区4，建立分区sda5，写入

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 !