CentOS 下添加新硬盘并分区格式化
CentOS 下添加新硬盘并分区格式化
1.先添加一块硬盘，并建立分区，格式化，然后挂载使用
用 Fdisk －l 来查看当前状态下磁盘情况
[root@linux1 ~]# fdisk -l
Disk/dev/hda: 5368 MB, 5368709120 bytes
255heads, 63 sectors/track, 652 cylinders
Units = cylinders of 16065 * 512 = 8225280bytes
Device Boot Start End Blocks Id System
/dev/hda1 * 1 13 104391 83 Linux
/dev/hda2 14 652 5132767 8e Linux LVM Disk/dev/hdb: 2147 MB, 2147483648 bytes
16heads, 63 sectors/track, 4161 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Disk/dev/hdb doesn't contain a valid partition table
上面红色标识行可以看出,添加了一块新硬盘/dev/hdb，大小为 2G，未分区格式化状态。
2.用 Fdisk /dev/hdb 来进行分区操作
[root@linux1 ~]# fdisk /dev/hdb
Device contains neither a valid DOS partitiontable, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel. Changes willremain in memory only, until you decide to write them. After that, of course,the previous content won't be recoverable.
Thenumber of cylinders for this disk is set to 4161.
There is nothing wrong with that, but this islarger 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 fromother OSs
(e.g., DOS FDISK, OS/2 FDISK)
Warning: invalid flag 0x0000 of partitiontable 4 will be corrected by w(rite)
Command (m for help): n //输入 N 表示新建一个分区
Command action e extended
p primary partition (1-4)
p //p 表示建立一个原始分区
Partition number (1-4): 1 //1 表示此分区编号为 1.
First cylinder (1-4161, default 1): 1 //1 表示使用默认起始柱面号.如果要分多个区的话，先盘算好要多大，再输入数字
Last cylinder or size or sizeM or sizeK(1-4161, default 4161): // 输入: 回车表示使用默认结束柱面号.即此分区使用整个硬盘空间
Using default value 4161
Command (m for help): w //保存分区
The partition table has been altered!Calling ioctl() to re-read partition table.
Syncing disks.
3.再次查看当前分区状态：
[root@linux1 ~]# fdisk -l
Disk /dev/hda: 5368 MB, 5368709120 bytes
255 heads, 63 sectors/track, 652 cylinders
Units = cylinders of 16065 * 512 = 8225280bytes
Device Boot Start End Blocks Id System
/dev/hda1 * 1 13 104391 83 Linux
/dev/hda2 14 652 5132767 8e Linux LVM
Disk /dev/hdb: 2147 MB, 2147483648 bytes
16 heads, 63 sectors/track, 4161 cylinders
Units = cylinders of 1008 * 512 = 516096bytes
Device Boot Start End Blocks Id System
/dev/hdb1 1 4161 2097112 83 Linux
可以看出，已经出来了一个/dev/hdb1 的新分区。下一步将其格式化，再使用
4.用 mkfs.ext4格式化新分区(服务器的话建议使用 ext4/mkf 格式)
[root@linux1 ~]# mkfs.ext4 /dev/hdb1
5.挂载使用
[root@linux1 ~]# mkdir /mnt/hdb1 //新建一个挂载点。
[root@linux1 ~]# mount /dev/hdb1 /mnt/hdb1//挂载。
[root@linux1 ~]# df -h
文件系统容量已用可用已用% 挂载点
/dev/mapper/VolGroup00-LogVol00
4.3G 3.6G 487M 89% /
/dev/hda1 99M 12M 82M 13% /boot tmpfs 125M0 125M 0% /dev/shm
/dev/hdb1 2.0G 3.0M 1.9G 1% /mnt/hdb1
7.设置新硬盘开机自动挂载
在 vi /etc/fstab 中添加新硬盘的挂载信息.添加下面一行:
/dev/hdb1 /mnt/hdb1 ext3 defaults 1 2（如果还有一个分区就是 1 3，以此类推)
这样,每次开机后,系统会自动将/dev/hdb1 挂载到/mnt/hdb1