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linux 创建扩展分区以及逻辑分区

[root@localhost ~]# fdisk /dev/sdb    //进入要分配的磁盘
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
switch off the mode (command 'c') and change display units to
sectors (command 'u').
Command (m for help): n   //创建分区
Command action
e   extended
p   primary partition (1-4)
e     //创建扩展分区
Partition number (1-4): 4      //分区号
First cylinder (5121-10240, default 5121):        //分区开始柱面,enter默认
Using default value 5121
Last cylinder, +cylinders or +size{K,M,G} (5121-10240, default 10240):      //分区结束柱面
Using default value 10240
Command (m for help): p      //打印分区情况
Disk /dev/sdb: 10.7 GB, 10737418240 bytes
64 heads, 32 sectors/track, 10240 cylinders
Units = cylinders of 2048 * 512 = 1048576 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xb92c060c
Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               1        5120     5242864   83  Linux
/dev/sdb4            5121       10240     5242880    5  Extended
Command (m for help): n    //创建分区
Command action
l   logical (5 or over)
p   primary partition (1-4)
l                                 //创建逻辑分区
First cylinder (5121-10240, default 5121):        //分区开始柱面,enter默认
Using default value 5121
Last cylinder, +cylinders or +size{K,M,G} (5121-10240, default 10240): 8192
Command (m for help): n             //再创建一个分区
Command action
l   logical (5 or over)
p   primary partition (1-4)
l                                                       //再创建一个逻辑分区
First cylinder (8193-10240, default 8193):                      //分区开始柱面,enter默认
Using default value 8193
Last cylinder, +cylinders or +size{K,M,G} (8193-10240, default 10240):   //分区结束柱面
Using default value 10240
Command (m for help): p     //打印分区表进行查看
Disk /dev/sdb: 10.7 GB, 10737418240 bytes
64 heads, 32 sectors/track, 10240 cylinders
Units = cylinders of 2048 * 512 = 1048576 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xb92c060c
Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               1        5120     5242864   83  Linux
/dev/sdb4            5121       10240     5242880    5  Extended
/dev/sdb5            5121        8192     3145712   83  Linux
/dev/sdb6            8193       10240     2097136   83  Linux
Command (m for help): w     //w保存上面设置,q退出而不报错
The partition table has been altered!
Calling ioctl() to re-read partition table.
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 or after you run partprobe(8) or kpartx(8)
Syncing disks.
[root@localhost ~]# mkfs.ext4 /dev/sdb5            //格式化
mke2fs 1.41.12 (17-May-2010)
Could not stat /dev/sdb5 --- No such file or directory        //这里注意一下,先执行partprobe命令让系统内核重读分区表,如果报错要reboot一下
[root@localhost ~]#  mkfs.ext4 /dev/sdb5   //格式化/dev/sdb5
mke2fs 1.41.12 (17-May-2010)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
196608 inodes, 786428 blocks
39321 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=805306368
24 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912
Writing inode tables: done                            
Creating journal (16384 blocks): done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 28 mounts or
180 days, whichever comes first.  Use tune2fs -c or -i to override.
[root@localhost ~]# mkfs.ext4 /dev/sdb6        //格式化/dev/sdb6
mke2fs 1.41.12 (17-May-2010)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
131072 inodes, 524284 blocks
26214 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=536870912
16 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912
Writing inode tables: done                            
Creating journal (8192 blocks): done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 33 mounts or
180 days, whichever comes first.  Use tune2fs -c or -i to override.
[root@localhost var]# mkdir /disk01
[root@localhost var]# mkdir /disk02
[root@localhost var]# mount /dev/sdb5 /disk01             //挂载分区
[root@localhost var]# mount /dev/sdb6 /disk02
[root@localhost var]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root
50G  3.9G   43G   9% /
tmpfs                 940M   72K  940M   1% /dev/shm
/dev/sda1             485M   38M  423M   9% /boot
/dev/mapper/VolGroup-lv_home
45G  532M   43G   2% /home
/dev/sdb5             3.0G   69M  2.8G   3% /disk01
/dev/sdb6             2.0G   35M  1.9G   2% /disk02
[root@localhost var]# vi /etc/fstab                  //添加到配置文件,这里略

注:本文转自http://blog.51cto.com/lk886655/1965412

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