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Centos 下 fdisk分区、格式化、挂载新硬盘

时间:2018-08-12 00:17来源:电脑教程学习网 www.etwiki.cn 编辑:admin

下面介绍怎样将一块新硬盘分区、格式化、挂载到系统,如适合你请继续阅读。
服务器上已经有两块硬盘,所以硬盘为sdc,后面就不做说明了。
1、
# fdisk -l
查看当前磁盘信息,就会发现最下面显示新加入的硬盘不是有效分区,如下:
=======================================================
Disk /dev/sdc: 1500.3 GB, 1500301910016 bytes
255 heads, 63 sectors/track, 182401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk /dev/sdc doesn't contain a valid partition table
=======================================================

2、
# fdisk /dev/sdc
对新硬盘分区,并根据提示进一步操作:
=======================================================
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 182401.
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): h 输入h或者m可查看帮助命令
h: unknown command
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 #输入n进行分区
Command action
e extended
p primary partition (1-4)
p 输入p为主分区,e为逻辑分区
Partition number (1-4): 1 由于是新盘我们输入1来分第一个主分区,共可以分4个主分区
First cylinder (1-182401, default 1): 选择该分区的起始磁盘数,如无特殊需求强烈建议选择默认,也就是1来分区(直接按回车)
Using default value 1
Last cylinder or +size or +sizeM or +sizeK (1-182401, default 182401):
定义该分区的大。绻茨希ò椿爻担┘词鞘褂萌靠捎么娲⒍,如分一个1G的空间,输入+1024m
Using default value 182401
Command (m for help): w #写入分区
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
=======================================================
添加新硬盘后添加为扩展分区,格式化时候经常会遇到这个错误,
mkfs.ext4: inode_size (128) * inodes_count (0) too big for a filesystem with 0 blocks, specify higher inode_ratio (-i) or lower inode count (-N)

原因是扩展分区不能直接格式化,智能格式化主分区和扩展分区,所以还需在这个扩展分区上继续添加一个逻辑分区,然后格式化
fdisk /dev/sdb

第一次执行这个命令的时候提示添加扩展分区,还需在执行一次 会提示逻辑分区和主分区,选择逻辑分区,然后再格式化为你需要的文件系统就ok了
上面的是添加的主分区步骤方法,扩展分区的区别在第一次执行fdisk /dev/sdb 选择 e, 之后要多执行一次 fdisk /dev/sdb 然后选择 l (L,是字母,不是数字!)
3、
# fdisk -l
可以找到我们刚才分的一个分区,内容如下:
=======================================================
Disk /dev/sdc: 1500.3 GB, 1500301910016 bytes
255 heads, 63 sectors/track, 182401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdc1 1 182401 1465136001 83 Linux
=======================================================

4、
使用mk2fs命令
[piaoyun@piaoyun-pc ~]# ls /sbin/mk*
查看mk格式!

# mkfs -t ext3 -c /dev/sdc1
对分区使用ext3格式化,如多个分区sdc2等以此类推!
# mkfs -t ext4 -c /dev/sdc1
对分区使用ext4格式化,如多个分区sdc2等以此类推!
因为新硬盘加了-c参数要先检测磁盘坏道,此过程万分漫长(150G),等待。。。
=======================================================
mke2fs 1.39 (29-May-2006)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
183156736 inodes, 366284000 blocks
18314200 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=0
11179 block groups
32768 blocks per group, 32768 fragments per group
16384 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968,
102400000, 214990848
Checking for bad blocks (read-only test): done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 22 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
=======================================================

5、
# mkdir /var/samba
新建挂载目录

6、
# mount -t ext3 /dev/sdc1 /var/samba
# mount -t ext4 /dev/sdc1 /var/samba
挂载新硬盘

7、
# df -hal
查看分区大小是否和我们预定的一样:
文件系统 容量 已用 可用 已用% 挂载点
/dev/sda7 9.5G 3.2G 5.9G 35% /
/dev/sda6 9.5G 151M 8.9G 2% /tmp
/dev/sda5 19G 3.6G 15G 20% /usr
/dev/sda3 19G 719M 18G 4% /home
/dev/sda2 230G 23G 196G 11% /var
/dev/sda1 99M 25M 69M 27% /boot
/dev/sdb1 233G 156G 78G 67% /var/samba2
tmpfs 1008M 0 1008M 0% /dev/shm
/dev/sdc1 1.4T 198M 1.3T 1% /var/samba ////此行为新硬盘

8、
# vi /etc/fstab
设置系统自动挂载硬盘,加入一行:
/dev/sdc1 /var/samba2 ext3 defaults 0 0
/dev/sdc1 /var/samba2 ext4 defaults 0 0

9、重启服务器,用步骤7检查一下,一切正常挂载完成
 

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标签(Tag):centOS CentOS修改IP地址
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