將虛擬機關閉，加載一塊硬盤
fdisk -l 發現新加載的硬盤標號是sdc ，也就是第三塊硬盤
fdisk /dev/sdc
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 2349.
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): m
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)
Command (m for help): n
Command action
e extended
p primary partition (1-4)
e
Partition number (1-4): 1
First cylinder (1-2349, default 1):
Using default value 1
Last cylinder or +size or +sizeM or +sizeK (1-2349, default 2349):
Using default value 2349
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
[root@qa ~]# mkfs -t ext3 -c /dev/sdc1
mke2fs 1.39 (29-May-2006)
/dev/sdc1: Invalid argument passed to ext2 library while setting up superblock
這是應為，在創建分區時添加的是擴展分區，擴展分區不能直接format，需要對擴展分區再劃分出邏輯分區
主分區,擴展分區,邏輯分區三者有什麼不同?什麼關系?各用在何處
1. 每個硬盤有一個主分區表, 其中每項表示一個主分區, 定義了硬盤上的一段連續空間,
主分區可以是各種類型的, 如fat, linux ext2, fat32, ntfs等等
2. 主分區表有一個限制, 最多只能有四個. 於是就有了擴展分區:
這是一個特殊的主分區, 它不能直接使用, 而是象一個指針, 指向一個擴展分區表.
每個硬盤只能有一個擴展分區.
3. 在擴展分區表中定義的分區就叫邏輯分區, 它的功能, 作用和主分區類似,
但被限制在擴展分區所定義的空間大小范圍內.
[root@qa ~]# fdisk /dev/sdc
The number of cylinders for this disk is set to 2349.
There is nothing wrong with tha123下一頁