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#一个IDE硬盘只能建4个分区，如果要建多于四个的分区，就要拿出一个主分区做为 #
#扩展分区，再在扩展分区里面进行其它的分区操作。 #
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[root@zhouqixiang ~]# fdisk /dev/sdb #对磁盘/dev/sdb进行分区
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0x68a3c8c6.
Changes will remain in memory only, until you decide to write them.
After that, of course, the previous content won't be recoverable.
Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
switch off the mode (command 'c') and change display units to
sectors (command 'u').
Command (m for help): p #打印分区表
Disk /dev/sdb: 10.7 GB, 10737418240 bytes
255 heads, 63 sectors/track, 1305 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: 0x68a3c8c6
Device Boot Start End Blocks Id System
Command (m for help): h #帮助
h: unknown command
Command action
a toggle a bootable flag
b edit bsd disklabel
c toggle the dos compatibility flag
d delete a partition #删除分区
l list known partition types
m print this menu
n add a new partition
o create a new empty DOS partition table
p print the partition table #打印分区表
q quit without saving changes
s create a new empty Sun disklabel
t change a partition's system id
u change display/entry units
v verify the partition table
w write table to disk and exit #保存分区
x extra functionality (experts only)
Command (m for help): n #新增分区
Command action
e extended #扩展分区
p primary partition (1-4) #主分区
p
Partition number (1-4): 1 #第一个主分区，编号1
First cylinder (1-1305, default 1):
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-1305, default 1305): +2G
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 2 #第二个主分区，编号2
First cylinder (263-1305, default 263):
Using default value 263
Last cylinder, +cylinders or +size{K,M,G} (263-1305, default 1305): +2G
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 3 #第三个主分区，编号3
First cylinder (525-1305, default 525):
Using default value 525
Last cylinder, +cylinders or +size{K,M,G} (525-1305, default 1305): +2G
Command (m for help): n #扩展分区，编号4
Command action
e extended
p primary partition (1-4)
e #这里选择扩展分区
Selected partition 4
First cylinder (787-1305, default 787):
Using default value 787
Last cylinder, +cylinders or +size{K,M,G} (787-1305, default 1305):
Using default value 1305
Command (m for help): p #打印分区表
Disk /dev/sdb: 10.7 GB, 10737418240 bytes
255 heads, 63 sectors/track, 1305 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: 0x68a3c8c6
Device Boot Start End Blocks Id System
/dev/sdb1 1 262 2104483+ 83 Linux
/dev/sdb2 263 524 2104515 83 Linux
/dev/sdb3 525 786 2104515 83 Linux
/dev/sdb4 787 1305 4168867+ 5 Extended
Command (m for help): n #对扩展分区再建第一个逻辑分区
First cylinder (787-1305, default 787):
Using default value 787
Last cylinder, +cylinders or +size{K,M,G} (787-1305, default 1305): +2G
Command (m for help): n #对扩展分区再建第二个逻辑分区
First cylinder (1049-1305, default 1049):
Using default value 1049
Last cylinder, +cylinders or +size{K,M,G} (1049-1305, default 1305):
Using default value 1305
Command (m for help): p #打印分区表，有5个可用分区（扩展分区用来建逻辑分区）
Disk /dev/sdb: 10.7 GB, 10737418240 bytes
255 heads, 63 sectors/track, 1305 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: 0x68a3c8c6
Device Boot Start End Blocks Id System
/dev/sdb1 1 262 2104483+ 83 Linux
/dev/sdb2 263 524 2104515 83 Linux
/dev/sdb3 525 786 2104515 83 Linux
/dev/sdb4 787 1305 4168867+ 5 Extended
/dev/sdb5 787 1048 2104483+ 83 Linux
/dev/sdb6 1049 1305 2064321 83 Linux
Command (m for help): w #保存分区表
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
#下面格式化分区，再进行手动挂载，把配置文件写入/etc/fstab
[root@zhouqixiang ~]# mkfs.ext4 /dev/sdb1
手动挂载分区请访问：