linux--using Fidsk to operate the Linux hard drive "Go"

This article transferred from: http://www.liusuping.com/ubuntu-linux/linux-fdisk-disk.html

Fdisk is a Linux-brought hard disk partitioning tool that allows you to partition your hard disk or make adjustments to your hard disk partition. For this test environment, please refer to [Linux Disk System Basics]

First select the disk to be operated on

[Email protected] ~]# Fdisk/dev/sdb

Enter m to list the commands that can be executed

Command (M for help): M
Command action
   a   toggle a bootable flag
 & nbsp b   Edit BSD Disklabel
   c   Toggle the DOS compatibility flag
   d    Delete a partition
   l   list known partition types
   m   print th is menu
   n   Add a new partition
   o   Create a new empty DOS partition T Able
   p   print the partition table
   q   quit without saving changes< br>   s   Create a new empty Sun Disklabel
   t   Change a partition ' s system i D
   u   change display/entry units
   v   Verify the partition table
   w   Write table to disk and exit
   x   Extra functionality (experts only)

Enter p to list the current partitioning of the disk

Command (M for help): P

disk/dev/sdb:3221 MB, 3221225472 bytes
255 heads, Sectors/track, 391 cylinders
Units = Cylinders of 16065 * 8225280 bytes

Device Boot Start End Blocks Id System
/DEV/SDB1 1 1 8001 8e Linux LVM
/DEV/SDB2 2 200812+ Linux

Enter D, then select the partition, delete the existing partition

Command (M for help): D
Partition number (1-4): 1

Command (M for help): D
Selected Partition 2

To view the partition, confirm that the partition has been deleted

Command (M for help): print

disk/dev/sdb:3221 MB, 3221225472 bytes
255 heads, Sectors/track, 391 cylinders
Units = Cylinders of 16065 * 8225280 bytes

Device Boot Start End Blocks Id System

Command (M for help):

Enter N to create a new disk partition, first set up two primary disk partitions

Command (M for help): N
Command Action
E Extended
P primary partition (1-4)
P//Establish primary partition
Partition number (1-4): 1//Partition code
First cylinder (1-391, default 1)://partition Start location
Using Default value 1
Last cylinder or +size or +sizem or +sizek (1-391, default 391): 100///partition end position, unit sector

Command (M for help): N//Create a partition again
Command Action
E Extended
P primary partition (1-4)
P
Partition number (1-4): 2//Partition 2
First cylinder (101-391, default 101):
Using Default Value 101
Last cylinder or +size or +sizem or +sizek (101-391, default 391): +200m//partition end position in M

Confirm that the partition was established successfully

Command (M for help): P

disk/dev/sdb:3221 MB, 3221225472 bytes
255 heads, Sectors/track, 391 cylinders
Units = Cylinders of 16065 * 8225280 bytes

Device Boot Start End Blocks Id System
/DEV/SDB1 1 803218+ Linux
/DEV/SDB2 101 200812+ Linux

and create a logical partition.

Command (M for help): N
Command Action
E Extended
P primary partition (1-4)
E//Select extended partition
Partition number (1-4): 3
First cylinder (126-391, default 126):
Using Default Value 126
Last cylinder or +size or +sizem or +sizek (126-391, default 391):
Using Default Value 391

Confirm that the extended partition was established successfully

Command (M for help): P

disk/dev/sdb:3221 MB, 3221225472 bytes
255 heads, Sectors/track, 391 cylinders
Units = Cylinders of 16065 * 8225280 bytes

Device Boot Start End Blocks Id System
/DEV/SDB1 1 803218+ Linux
/DEV/SDB2 101 200812+ Linux
/DEV/SDB3 126 391 2136645 5 Extended

Establish two logical partitions on an extended partition

Command (M for help): N
Command Action
L logical (5 or over)
P primary partition (1-4)
L//Select logical partition
First cylinder (126-391, default 126):
Using Default Value 126
Last cylinder or +size or +sizem or +sizek (126-391, default 391): +400m

Command (M for help): N
Command Action
L logical (5 or over)
P primary partition (1-4)
L
First cylinder (176-391, default 176):
Using Default Value 176
Last cylinder or +size or +sizem or +sizek (176-391, default 391):
Using Default Value 391

Confirm logical Partition Establishment succeeded

Command (M for help): P

disk/dev/sdb:3221 MB, 3221225472 bytes
255 heads, Sectors/track, 391 cylinders
Units = Cylinders of 16065 * 8225280 bytes

Device Boot Start End Blocks Id System
/DEV/SDB1 1 803218+ Linux
/DEV/SDB2 101 200812+ Linux
/DEV/SDB3 126 391 2136645 5 Extended
/DEV/SDB5 126 175 401593+-up Linux
/DEV/SDB6 176 391 1734988+-Up Linux

Command (M for help):

From the above results we can see that in HDD SDB we have established 2 primary partitions (SDB1,SDB2), one extended partition (SDB3), 2 logical partitions (SDB5,SDB6)

Note: The disk number of the primary and extended partitions is 1-4, which means that there are up to 4 primary partitions or extended partitions, and the logical partition starts with a disk number of 5, so there is no SDB4 in this experiment.

Finally, the partition operation is saved

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

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

After the partition is established, we also need to format the partition to use the disk in the system.

Establish ext2 partition on SDB1

[[email protected] ~]#&NBSP;MKFS.EXT2/DEV/SDB1
mke2fs 1.39 (29-may-2006)
Filesystem label=
OS type:linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
100576 inodes, 200804 blocks
10040 blocks (5.00%) reserved for the Super User
First Data block=0
Maximum filesystem blocks=209715200
7 block G Roups
32768 blocks per group, 32768 fragments per group
14368 inodes per group
superblock backups stored on block S:&NBSP
        32768, 98304, 163840

Writing inode tables:done & nbsp;                           
Writing superblocks and filesystem accounting information : Done

This filesystem'll be automatically checked every mounts or
$ days, whichever comes first.  Use Tune2fs-c or-i to override.

Establish EXT3 partition on SDB6

[Email protected] ~]# MKFS.EXT3/DEV/SDB6
MKE2FS 1.39 (29-may-2006)
Filesystem label=
OS Type:linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
217280 inodes, 433747 blocks
21687 blocks (5.00%) reserved for the Super user
First Data block=0
Maximum filesystem blocks=444596224
Block groups
32768 blocks per group, 32768 fragments per group
15520 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 would be automatically checked every mounts or
Whichever comes first. Use Tune2fs-c or-i to override.
[Email protected] ~]#

Set up two directories/oracle and/web to mount the new two partitions to the system

[Email protected] ~]# mkdir/oracle
[Email protected] ~]# Mkdir/web
[Email protected] ~]# mount/dev/sdb1/oracle
[Email protected] ~]# Mount/dev/sdb6/web

View partition Mount conditions

[[email protected] ~]# df-h
File System                capacity   used available% mount point
/dev/mapper/volgroup00-logvol00
                       6.7G   2.8g  3.6g  44%/
/dev/sda1               99m   12m   82m  13%/boot
tmpfs                  125m     0  125m   0%/ DEV/SHM
/dev/sdb1             773M  808K   733m   1%/oracle
/dev/sdb6              1.7g   35m  1.6g   3%/web

If you need to automatically mount each boot, you need to modify the/etc/fstab file, add two lines of configuration

[Email protected] ~]# Vim/etc/fstab

/DEV/VOLGROUP00/LOGVOL00/EXT3 Defaults 1 1
Label=/boot/boot ext3 Defaults 1 2
TMPFS/DEV/SHM TMPFS Defaults 0 0
Devpts/dev/pts devpts gid=5,mode=620 0 0
Sysfs/sys Sysfs Defaults 0 0
PROC/PROC proc Defaults 0 0
/DEV/VOLGROUP00/LOGVOL01 swap swap defaults 0 0
/dev/sdb1/oracle ext2 Defaults 0 0
/dev/sdb6/web ext3 defaults 0 0

linux--using Fidsk to operate the Linux hard drive "Go"