linux 使用fdisk添加新分区 2014-08-14 22:31 by 潇湘隐者, ... 阅读, ... 评论, 收藏, 编辑 Linux系统由于数据累计增长、前期存储规划不合理等诸多因素，出现存储不够用的情况时，此时就需要扩展逻辑分区或添加新的逻辑分区。下面介绍一下通过使用fdsik添加新的逻辑分区。 首先使用df命令检查文件系统的磁盘空间占用情况
[root@DB-ONE-SERVER~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-sda3
30G 2.4G 26G 9% /
/dev/sda1 99M 23M 71M 25% /boot
tmpfs 4.0G 0 4.0G 0% /dev/shm
You have new mail in /var/spool/mail/root
然后使用fdisk -l查看分区表信息
[root@DB-ONE-SERVER~]# fdisk -l
Disk /dev/sda: 42.9 GB, 42949672960 bytes
255 heads, 63 sectors/track, 5221 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda2 14 5221 41833260 8e Linux LVM
Disk /dev/sdb: 21.4 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk /dev/sdb doesn't contain a valid partition table
Disk /dev/dm-0: 32.3 GB, 32346472448 bytes
255 heads, 63 sectors/track, 3932 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk /dev/dm-0 doesn't contain a valid partition table
Disk /dev/dm-1: 10.4 GB, 10468982784 bytes
255 heads, 63 sectors/track, 1272 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk /dev/dm-1 doesn't contain a valid partition table
fdisk命令参数介绍 p、打印分区表。 n、新建一个新分区。 d、删除一个分区。 m、输出菜单 q、退出不保存。 w、把分区写进分区表，保存并退出。
[root@DB-ONE-SERVER~]# fdisk /dev/sdb
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 2610.
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