一、硬盘结构 对于每一个硬盘,它包括： --主引导记录 MBR --硬盘分区表 SPT --主分区 Primary Partition --扩展分区 Extended Partition --逻辑分区 Logical Partition 二、关于主分区 1、一块硬盘只能有四个主分区. 2、用户可以也只可以将一个主分区变成扩展分区. 3、在扩展分区上,再划分逻辑分区. 三、针对设备管理的操作 1、查看当前机器的硬盘分区情况 fdisk –l /dev/sda Device Boot Start End Blocks Id System
/dev/sda1 * 1 6 48163 83 Linux
/dev/sda2 7 515 4088542 83 Linux
/dev/sda3 516 772 2064352 82 Linux swap / Solaris
/dev/sda4 773 3916 25254180 5 Extended
/dev/sda5 773 3916 25254148 83 Linux 备注：加*是代表这个分区是启动分区. start是代表该分区的起始磁柱是1, end是代表该分区的结束磁柱是6. blocks是代表该分区的大小,ID代表该分区的ID号. ID为83代表是linux分区. 2、对硬盘的操作 fdisk /dev/sda The number of cylinders for this disk is set to 3916.
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): m（敲m进入帮助）
Command action
a toggle a bootable flag
b edit bsd disklabel
c toggle the dos compatibility flag
d delete a partition
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
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
x extra functionality (experts only) partprobe 代表让内核读取最新的分区表,也就是让分区表立刻生效；
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