LINUX系统分区：No free sectors available，2T的硬盘，明明还没有用完，为什么不能分区了。

你已经分好区了，有*的sda1是启动分区，是装内核以及grub相关文件的地方，剩余的是一个分区。一般来说要有一个swap分区，不过现在内存比较大，如果只是个人使用没有特别要求，不用分区也可以。

Linux中创建新分区提示没有可用自由部门可以用fdisk命令新建分区，方法如下：

1、首先查看硬盘信息，用fdisk -l命令，如果有硬盘有剩余空间就可以对其进行分区。

[root@bogon 桌面]# fdisk -l

Disk /dev/sda: 85.9 GB, 85899345920 bytes

255 heads, 63 sectors/track, 10443 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: 0x000471ad

Device Boot StartEnd Blocks Id System

/dev/sda1 * 1 26 204800 83 Linux

Partition 1 does not end on cylinder boundary.

/dev/sda2 26385130720000 83 Linux

/dev/sda3385141062048000 82 Linux swap / Solaris

/dev/sda44106 10444509122565 Extended

/dev/sda54106 1044450911232 83 Linux

Disk /dev/sdb: 21.5 GB, 21474836480 bytes

255 heads, 63 sectors/track, 2610 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: 0x00000000

#从上面看出/dev/sda空间已经用完了，/dev/sdb没有使用。

2、下面对/dev/sdb 进行分区

[root@bogon 桌面]# fdisk /dev/sdb

Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel

Building a new DOS disklabel with disk identifier 0xfaa2aa49.

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): m //输入m查看帮助文档

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 //添加一个新的分区

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)

#fdisk选中/dev/sdb 输入m所有基本选项都出现，输入n新建分区

Command (m for help): n

Command action

e extended

p primary partition (1-4)

3、有扩展分区和主分区，逻辑分区在扩展分区中建立。注意到括号中的1-4，最多只能建四个主分区（包括扩展分区）。先建一个主分区：

Command (m for help): n

Command action

e extended

p primary partition (1-4)

p #建主分区

Partition number (1-4): 1 #分区号为1

First cylinder (1-2610, default 1): #直接回车默认从第一个柱面开始划分

Using default value 1

Last

cylinder, +cylinders or +size{K,M,G} (1-2610, default 2610): +2G

#加空间大小，这里有很多种选择：+后面单位可以接M，G，K（记得要大写）表示划分你所加的空间，也可以是柱面数。不管怎样都不能超过该磁盘剩余的空间否则无效。

Command (m for help): p #分好后查看分区信息，刚所做的所有一目了然。

Disk /dev/sdb: 21.5 GB, 21474836480 bytes

255 heads, 63 sectors/track, 2610 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: 0xfaa2aa49

Device Boot Start End Blocks Id System

/dev/sdb1 1 262 2104483+ 83 Linux

4、同上所述建立扩展分区：

Command (m for help): n

Command action

e extended

p primary partition (1-4)

e #建立扩展分区

Partition number (1-4): 4

First cylinder (263-2610, default 263):

Using default value 263

Last cylinder, +cylinders or +size{K,M,G} (263-2610, default 2610): +4G

Command (m for help): p

Disk /dev/sdb: 21.5 GB, 21474836480 bytes

255 heads, 63 sectors/track, 2610 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: 0xfaa2aa49

Device Boot Start End Blocks Id System

/dev/sdb1 1 262 2104483+ 83 Linux

/dev/sdb4 263 785 4200997+ 5 Extended

5、扩展分区建好就可以在扩展分区建立逻辑分区了

Command (m for help): n

Command action

l logical (5 or over)

p primary partition (1-4)

l #建逻辑分区

First cylinder (263-785, default 263):

Using default value 263

Last cylinder, +cylinders or +size{K,M,G} (263-785, default 785): +2G

Command (m for help): p

Disk /dev/sdb: 21.5 GB, 21474836480 bytes

255 heads, 63 sectors/track, 2610 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: 0xfaa2aa49

Device Boot Start End Blocks Id System

/dev/sdb1 1 262 2104483+ 83 Linux

/dev/sdb4 263 785 4200997+ 5 Extended

/dev/sdb5 263 524 2104483+ 83 Linux

6、上面显示已经建好一个主分区，一个逻辑分区，但是这些现在还没有生效，需要保存退出。

Command (m for help): w #保存退出

The partition table has been altered!

Calling ioctl() to re-read partition table.

Syncing disks.

26646171 是关键词发贴刷分机器人吧？

romfs 要分哪种的。不过一般来说 Linux 下面的只读文件系统都不是格式化分区（第一次听说格式化扇区）实现的，一般都是生成为一个文件，之后这个文件烧写到设备的存储器里面。

你还是先去学习一下基础知识吧……

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