Linux system disk partition Fdisk__linux

For learning a disk partition, you usually learn the fdisk command
Of course, for disks less than 2TB, we basically use the FDISK command to partition
The following is a brief introduction to the basic commands and scenario simulations of the Fdisk operation disk

Introduction to Common commands
FDISK-L View all disk information
Fdisk/dev/sdb Use the Fdisk command tool to manipulate/DEV/SDB disks
M displays all command information, usage
P Display partition information
Q exit
W saves the partition information and writes the partition information to the disk only after the W command is executed
D 1 Delete the first partition of the disk

Scene simulation

There is a 1G disk/dev/sdb

The partition is a primary partition, an extended partition with a size of 200M

Where a 100M logical partition is established above the extended partition/DEV/SDB5

Format File system is MKFS.EXT4

Enable automatic mount to directory/backup3

1 using the FDISK command tool to manipulate disk/dev/sdb
Fdisk/dev/sdb
2 Create a primary partition
Command (M for help): N
Command Action
E Extended
P primary partition (1-4)
P
Partition number (1-4): 1
Using Default value 1
Last cylinder, +cylinders or +size{k,m,g} (1-130, default 130): +400m

Command (M for help): P

disk/dev/sdb:1073 MB, 1073741824 bytes
255 heads, Sectors/track, 130 cylinders
Units = Cylinders of 16065 * 8225280 bytes
Sector size (logical/physical): bytes/512 bytes
I/O size (minimum/optimal): bytes/512 bytes
Disk identifier:0x0004a98a

Device Boot Start End Blocks Id System
/DEV/SDB1 1 417658+ Linux

3 Creating an extended partition
Command (M for help): N
Command Action
E Extended
P primary partition (1-4)
E
Partition number (1-4): 2
The cylinder (53-130, default 53):
Using Default Value 53
Last cylinder, +cylinders or +size{k,m,g} (53-130, default 130): +400m

Command (M for help): P

disk/dev/sdb:1073 MB, 1073741824 bytes
255 heads, Sectors/track, 130 cylinders
Units = Cylinders of 16065 * 8225280 bytes
Sector size (logical/physical): bytes/512 bytes
I/O size (minimum/optimal): bytes/512 bytes
Disk identifier:0x0004a98a

Device Boot Start End Blocks Id System
/DEV/SDB1 1 417658+ Linux
/DEV/SDB2 417690 5 Extended

4 Creating a logical partition
Command (M for help): N
Command Action
L logical (5 or over)
P primary partition (1-4)
L
The cylinder (53-104, default 53):
Using Default Value 53
Last cylinder, +cylinders or +size{k,m,g} (53-104, default): +100m

Command (M for help): P

disk/dev/sdb:1073 MB, 1073741824 bytes
255 heads, Sectors/track, 130 cylinders
Units = Cylinders of 16065 * 8225280 bytes
Sector size (logical/physical): bytes/512 bytes
I/O size (minimum/optimal): bytes/512 bytes
Disk identifier:0x0004a98a

Device Boot Start End Blocks Id System
/DEV/SDB1 1 417658+ Linux
/DEV/SDB2 417690 5 Extended
/DEV/SDB5 112423+ MB Linux

5 Save
Command (M for help): W
The partition table has been altered!

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

6 Partitioning a disk
[Root@hsj2 ~]# MKFS.EXT4/DEV/SDB1
MKE2FS 1.41.12 (17-may-2010)
FileSystem label=
OS Type:linux
Block size=1024 (log=0)
Fragment size=1024 (log=0)
Stride=0 blocks, stripe width=0 blocks
104448 inodes, 417656 blocks
20882 blocks (5.00%) reserved for the Super user
The Data block=1
Maximum filesystem blocks=67633152
Wuyi block Groups
8192 blocks per group, 8192 fragments per group
2048 inodes per group
Superblock backups stored on blocks:
8193, 24577, 40961, 57345, 73729, 204801, 221185, 401409

Writing Inode Tables:done
Creating journal (8192 blocks): Done
Writing superblocks and filesystem accounting Information:done

This filesystem would be automatically checked every mounts or
180 days, whichever comes. Use Tune2fs-c or-i to override.

[Root@hsj2 ~]# MKFS.EXT4/DEV/SDB5
MKE2FS 1.41.12 (17-may-2010)
FileSystem label=
OS Type:linux
Block size=1024 (log=0)
Fragment size=1024 (log=0)
Stride=0 blocks, stripe width=0 blocks
28112 inodes, 112420 blocks
5621 Blocks (5.00%) reserved for the Super user
The Data block=1
Maximum filesystem blocks=67371008
Block groups
8192 blocks per group, 8192 fragments per group
2008 Inodes per Group
Superblock backups stored on blocks:
8193, 24577, 40961, 57345, 73729

Writing Inode Tables:done
Creating journal (4096 blocks): Done
Writing superblocks and filesystem accounting Information:done

This filesystem would be automatically checked every mounts or
180 days, whichever comes. Use Tune2fs-c or-i to override.

OK, it's done.