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Last cylinder or +size or +sizeM or +sizeK (4961-5221, default
5221): +20m      

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

Disk /dev/sdc: 21.4 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

用fdisk对磁盘分区:
[root@wmstest ~]# 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.

Command (m for help): n
Command action
   e   extended
   p   primary partition (1-4)

   Device Boot      Start         End      Blocks   Id System
/dev/sdb1               1          62      497983+ 83 Linux

Command (m for help): n Command action
   l   logical (5 or over)
   p   primary partition (1-4)
l 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

再也翻开磁盘:
[root@wmstest ~]# fdisk -l
Disk /dev/sda: 85.8 GB, 85899345920 bytes
255 heads, 63 sectors/track, 10443 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 2563 20482875 83 Linux
/dev/sda3 2564 4603 16386300 82 Linux swap / Solaris
/dev/sda4 4604 10443 46909800 83 Linux
Disk /dev/sdb: 107.3 GB, 107374182400 bytes
255 heads, 63 sectors/track, 13054 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 1 13054 104856223+ 83 Linux

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1        3916    31455238+  83  Linux
/dev/sda2            3917        4438     4192965   82  Linux swap /
Solaris
/dev/sda3            4439        4960     4192965   83  Linux
/dev/sda4            4961        4963       24097+  83  Linux

Command (m for help): n
Command action
   e   extended
   p   primary partition (1-4)
p
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): +500M

Disk /dev/sdb: 32.2 GB, 32212254720 bytes
255 heads, 63 sectors/track, 3916 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

The number of cylinders for this disk is set to 13054.
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): p
Disk /dev/sdb: 107.3 GB, 107374182400 bytes
255 heads, 63 sectors/track, 13054 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
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 (1-13054, default 1):
Using default value 1
Last cylinder or +size or +sizeM or +sizeK (1-13054, default 13054):
Using default value 13054
Command (m for help): p
Disk /dev/sdb: 107.3 GB, 107374182400 bytes
255 heads, 63 sectors/track, 13054 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 1 13054 104856223+ 83 Linux
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.

partprobe 
Warning: Unable to open /dev/sr0 read-write (Read-only file system).
 /dev/sr0 has been opened read-only.
Segmentation
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[root@server1 ~]# grep ‘swap’ /etc/fstab
/dev/VolGroup00/LogVol01 swap                    swap    defaults       
0 0

4、创立文件系统

挂载磁盘:
[root@wmstest ~]# mount /dev/sdb1 /u01/

Disk /dev/sda: 42.9 GB, 42949672960 bytes
255 heads, 63 sectors/track, 5221 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

……………………………………………………
……………………………………………………
……………………………………………………

再执行df

格式化磁盘:
[root@wmstest ~]# 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)
13107200 inodes, 26214055 blocks
1310702 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
800 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
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 39 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.

1. 开立分区
[root@ www.linuxidc.com ~]# fdisk
/dev/sda
Command (m for help): p

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

踌躇满志了一晃,然后直接试行

安装开机自动挂载:
[root@wmstest ~]# vi /etc/fstab
/dev/sdb1 /u01 ext3 defaults 0 0

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

Command (m for help): p

[root@192.168.14.117:/dev]#fdisk -l

初步磁盘挂载情况:
[root@wmstest ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda2 19G 9.0G 9.1G 50% /
/dev/sda4 44G 181M 41G 1% /u01
/dev/sda1 99M 22M 73M 23% /boot
tmpfs 4.0G 0 4.0G 0% /dev/shm

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1        3916    31455238+  83  Linux
/dev/sda2            3917        4438     4192965   82  Linux swap /
Solaris
/dev/sda3            4439        4960     4192965   83  Linux

Hex code (type L to list codes): 82
Changed system type of partition 1 to 82 (Linux swap / Solaris)
Command (m for help): p

[root@192.168.14.117:/root]#df -m
Filesystem           1M-blocks      Used        Available Use% Mounted
on
/dev/sda3                17599       15619      1072          94%   /
/dev/sda1                  251         16             223          
7%     /boot
tmpfs                      760            0               760          
0%     /dev/shm
/dev/sdb3                30236       23542      5159          83%  
/data

[root@wmstest ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda2 19G 9.0G 9.1G 50% /
/dev/sda4 99G 188M 94G 1% /u01
/dev/sda1 99M 22M 73M 23% /boot
tmpfs 4.0G 0 4.0G 0% /dev/shm
/dev/sdb1 99G 188M 94G 1% /u01

Calling ioctl() to re-read partition table.

Disk /dev/sdb: 21.4 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/sda3             18020368 15983692   1106516 94% /
/dev/sda1               256666     15923    227491   7% /boot
tmpfs                   777688         0    777688   0% /dev/shm
/dev/sdb3             30961664 24018284   5370620 82% /data
/dev/sdc5             20635668    176200 19411232   1% /datalog

申请的设想机因总宕机,管理完今后多分配了本身100G空间,照旧狠讲究的嘛,挂载方法如下:

Disk /dev/sda: 42.9 GB, 42949672960 bytes
255 heads, 63 sectors/track, 5221 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

3:使用fdisk命令在新加上的磁盘上划出一块500M的空中,并把格式调换为82,即swap分区格式
[root@server1 ~]# 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)

This filesystem will be automatically checked every 33 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.

查阅磁盘:
[root@wmstest ~]# fdisk -l
Disk /dev/sda: 85.8 GB, 85899345920 bytes
255 heads, 63 sectors/track, 10443 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 2563 20482875 83 Linux
/dev/sda3 2564 4603 16386300 82 Linux swap / Solaris
/dev/sda4 4604 10443 46909800 83 Linux
Disk /dev/sdb: 107.3 GB, 107374182400 bytes
255 heads, 63 sectors/track, 13054 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

First cylinder (4961-5221, default 4961): 

Command (m for help): t
Selected partition 1
Hex code (type L to list codes): L

Disk /dev/sdc: 21.4 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Command (m for help): p

一:新建三个换到分区
1:挂载上一块新的杜撰磁盘,使用fdisk
-l命令查看系统是或不是能科学的辨别磁盘
[root@server1 ~]# fdisk -l
Disk /dev/sda: 85.8 GB, 85899345920 bytes
255 heads, 63 sectors/track, 10443 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       10443    83778975   8e Linux LVM

   Device Boot      Start         End      Blocks   Id System
/dev/sda1   *           1          33      265041   83 Linux
/dev/sda2              34         294     2096482+ 82 Linux swap /
Solaris
/dev/sda3             295        2610    18603270   83 Linux

p

2:查看当前的交流分区和挂载选项,方今为1G,所在的大要地方为LVM卷组中的:/dev/mapper/VolGroup00-LogVol01
[root@server1 365bet体育在线网投,~]# swapon -s
Filename                                Type            Size    Used   
Priority
/dev/mapper/VolGroup00-LogVol01         partition       1048568 0      
-1

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WARNING: Re-reading the partition table failed with error 16: Device or
resource busy.
The kernel still uses the old table.
The new table will be used at the next reboot.
Syncing disks.

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

都例行了。完美消除。

Disk /dev/sdb: 21.4 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

提示小编输入指令,可怜的记不住命令,只可以打一个m,for help了 ^-^

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

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