065 使用 fdisk 分区

当你在服务器上安装新的硬盘后，你必须使用fdisk工具对其进行适当的分区。

以下是5种你在执行fdisk时用到的选项：

• n ：创建新的分区
• d : 删除现有的分区
• p ：打印分区表
• w：在分区表中写入修改内容。
• q：退出分区任务。

创建分区

在下面的里中我创建了一个/dev/sda1主分区。

# fdisk /dev/sda
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 34893. 
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) 
 
Command (m for help): p 

Disk /dev/sda: 287.0 GB, 287005343744 bytes 
255 heads, 63 sectors/track, 34893 cylinders 
Units = cylinders of 16065 * 512 = 8225280 bytes 
 
Device Boot  Start   End      Blocks   Id  System 
 
Command (m for help): n 
Command action 
   e   extended 
   p   primary partition (1-4) 
p 
Partition number (1-4): 1 
First cylinder (1-34893, default 1):  
Using default value 1 
Last cylinder or +size or +sizeM or +sizeK (1-34893, 
default 34893):  
Using default value 34893 
 
Command (m for help): w 
The partition table has been altered! 
 
Calling ioctl() to re-read partition table. 
Syncing disks.

校验分区是否创建成功

# fdisk /dev/sda 
 
The number of cylinders for this disk is set to 34893. 
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): p 
 
Disk /dev/sda: 287.0 GB, 287005343744 bytes 
255 heads, 63 sectors/track, 34893 cylinders 
Units = cylinders of 16065 * 512 = 8225280 bytes 
 
Device Boot  Start         End      Blocks   Id  System 
/dev/sda1        1       34893   280277991   83  Linux 
 
Command (m for help): q