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linux移除硬盘命令 linux移除移动硬盘
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linux下如何删除磁盘分区
以RH9为例,上面有只有两个分区
/dev/sda1
和/dev/sda2
#fdisk
/dev/sda
(注意sda后不要加数字)
command(m
for
help):
m
输入m后,就会看到很多命令
command(m
for
help):
p
输出当前磁盘的状态
command(m
for
help):
q
想要不存储离开吗?按下q,请不要随便按w
新增分区:#fdisk
/dev/sda
command(m
for
help):
n
此时系统会提示新增P(主分区)还是E(扩展分区),系统一般是(4个P)+E,而且E分区号必须从5开始
p
这里自行决定是P还是E
Partition
number(1-4):3
编号可以随意
First
cylinder:
这里按下ENTER就行了
Last
cylinder
or
..............:
+100M
再输入P的时候就能看到新增的分区了
删除分区:
#fdisk
/dev/sda
command(m
for
help):
d
选择分区号
记住q---不存储离开
w---存储离开
附上容易混淆的两个命令:
df(disk
free)---显示磁盘的文件系统与使用情形
du(disk
usage)---显示指定的目录或文件所占用的磁盘空间
相关问答
Q1: linux虚拟机卸载新硬盘的方法
装载:
1、启动vmlinux移除硬盘命令,选择vm-Settings,按向导添加一块SCSI磁盘。进入Linux系统。
2、 fdisk -l 会看到有一块新linux移除硬盘命令的设置,如果linux移除硬盘命令你先前有一块硬盘(sda1, sda3...),新加的这块应该是(/dev/sdb)。
[root@localhost ~]# fdisk -l
Disk /dev/sda: 8589 MB, 8589934592 bytes
255 heads, 63 sectors/track, 1044 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda3 14 1044 8281507+ 83 Linux
Disk /dev/sdb: 8589 MB, 8589934592 bytes
255 heads, 63 sectors/track, 1044 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk /dev/sdb doesn't contain a valid partition table
3、分区:
[root@localhost ~]# 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 1044.
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
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
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-1044, default 1):
Using default value 1
Last cylinder or +size or +sizeM or +sizeK (1-1044, default 1044):
Using default value 1044
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
[root@localhost ~]# fdisk -l
Disk /dev/sda: 8589 MB, 8589934592 bytes
255 heads, 63 sectors/track, 1044 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda3 14 1044 8281507+ 83 Linux
Disk /dev/sdb: 8589 MB, 8589934592 bytes
255 heads, 63 sectors/track, 1044 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 1 1044 8385898+ 83 Linux
4、格式化:
[root@localhost ~]# 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)
1048576 inodes, 2096474 blocks
104823 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=2147483648
64 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
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 31 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
5、装载:
[root@localhost ~]# mount /dev/sdb1 /u01/app/oracle
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
6.7G 5.8G 576M 92% /
/dev/sda1 99M 12M 82M 13% /boot
tmpfs 233M 0 233M 0% /dev/shm
/dev/sdb1 7.9G 147M 7.4G 2% /u01/app/oracle
6、编辑fstab文件(不然重启电脑后系统将不会保存之前的挂载操作):
[root@localhost ~]# vi /etc/fstab
/dev/VolGroup00/LogVol00 / ext3 defaults 1 1
LABEL=/boot /boot ext3 defaults 1 2
devpts /dev/pts devpts gid=5,mode=620 0 0
tmpfs /dev/shm tmpfs defaults 0 0
proc /proc proc defaults 0 0
sysfs /sys sysfs defaults 0 0
/dev/VolGroup00/LogVol01 swap swap defaults 0 0
/dev/sdc1 /u03 ext3 defaults 1 1
/dev/sdb1 /u01/app/oracle ext3 defaults 1 1
# Beginning of the block added by the VMware software
.host:/ /mnt/hgfs vmhgfs defaults,ttl=5 0 0
# End of the block added by the VMware software
卸载:
[root@localhost ~]# umount /dev/sdb1
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
6.7G 5.8G 576M 92% /
/dev/sda1 99M 12M 82M 13% /boot
tmpfs 233M 0 233M 0% /dev/shm
Q2: Linux下清除磁盘分区及残留raid信息
Linux下清除磁盘分区及残留raid信息
适用场景:
1、 查看硬盘编号
2、 删除磁盘分区
3、 删除磁盘内残留raid信息
*本文适用于430-8i等只有低速格式化或没有格式化功能的HBA卡使用,若raid卡有格式化功能,建议使用raid卡格式化解决问题。
一、查看硬盘编号
适用lsblk命令可以查看当先系统下的磁盘相关信息及磁盘大小
sda为硬盘为系统内的第一个硬盘
sda1为该硬盘下的第一个分区以此类推
二、删除磁盘分区
三、删除磁盘内残留raid信息
如果磁盘在其他raid卡中做过raid,在430-8i这类没有格式化功能的HBA卡中使用时,使用parted等相关命令无法将raid残留信息删除导致无法分区正常安装系统。
现象如下:
Raid卡残留信息的type为dmraid分区名称以`-ddf_开头
删除方法如下:
整体思路是通过dd命令将残留信息所在扇区置零
通常raid卡的信息会放在最后一个柱面即最后63个扇区
以sda为例:
发现有dpIBM等信息,为残留的raid信息
再打印发现已经置零,清除成功。
重启节点重新加载linux中才会生效
Q3: Linux系统中进行磁盘管理的常用命令有哪些
Linux磁盘与文件系统管理命令
fdisklinux移除硬盘命令:磁盘分区工具
partprobelinux移除硬盘命令:更新内核linux移除硬盘命令的硬盘分区表信息
tune2fslinux移除硬盘命令:调整ext2/ext3/ext4文件系统参数
parted:磁盘分区工具
mkfs:创建Linux文件系统
dumpe2fs:导出ext2/ext3/ext4文件系统信息
resize2fs:调整ext2/ext3/ext4文件系统大小
fsck:检查并修复Linux文件系统
dd:转换或复制文件
mount:挂载文件系统
umount:卸载文件系统
df:报告文件系统磁盘空间linux移除硬盘命令的使用情况
mkswap:创建交换分区
swapon:激活交换分区
swapoff:关闭交换分区
sync:刷新文件系统缓冲区
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