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Linux下添加新硬盘或去除硬盘

发布时间:2015-02-11 22:26:53来源:linux网站作者:linux人

添加硬盘开机后
dmesg | grep sd
sda: sda1 sda2
sdb: unknown partition table


创建硬盘信息
fdisk /dev/sdb
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 添加分区
Command action
e   extended
p   primary partition (1-4)
p 添加主分区
Partition number (1-4): 1
First cylinder (1-2610, default 1):
Using default value 1
Last cylinder or +size or +sizeM or +sizeK (1-2610, default 2610):
Using default value 2610

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.


格式化硬盘
[root@lmap ~]# mkfs -t ext3 /dev/sdb1
mke2fs 1.39 (29-May-2006)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
2621440 inodes, 5241198 blocks
262059 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=0
160 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

Writing inode tables: done                          
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done

This filesystem will be automatically checked every 29 mounts or
180 days, whichever comes first.  Use tune2fs -c or -i to override.


创建mount目录
mkdir -p /mnt/CentOS01

mout到指定的目录
mount /dev/sdb1 /mnt/centos01

修改/etc/fstab文件,每次开机自动加载
vi /etc/fstab
/dev/sdb1               /mnt/centos01           ext3     defaults        1 1


查看
[root@lmap ~]# df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
18156292   2574216  14644912  15% /
/dev/sda1               101086     18382     77485  20% /boot
tmpfs                   517552         0    517552   0% /dev/shm
/dev/sdb1             20635700    176200  19411264   1% /mnt/centos01


关于去除硬盘,修改/etc/fstab文件,删除相关内容

删除硬盘后如果不去掉/etc/fstab文件中的
/dev/sdb1               /mnt/centos01           ext3     defaults        1 1

重启后会出现
Give root password for maintenance
(or type Control-D to continue):


解决办法:
这是所有的文件系统是只读的,输入root密码后,使用这个命令
#mount -o remount,rw /
然后去掉/etc/fstab文件中的
/dev/sdb1               /mnt/centos01           ext3     defaults        1 1

reboot