Introduction to fdisk

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# An IDE hard drive can only create four partitions. If you want to create more than four partitions, you need to take out one primary partition #
# Expand the partition, and then perform other partitioning operations in the extended partition. #
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[[Email protected] ~] # Fdisk/dev/SDB# Partition Disk/dev/SDB
Device contains neither a valid DOS partition table, Nor Sun, SGI or OSF disklabel
Building a new dos disklabel with disk identifier 0x68a3c8c6.
Changes will remain in memory only, until you decide to write them.
After that, of course, the previous content won't be recoverable.

Warning: Invalid flag 0x0000 of Partition Table 4 will be corrected by W (RITE)

Warning: DOS-compatible mode is deprecated. It's stronugly recommended
Switch off the mode (command 'C') and change display units
Sectors (command 'U ').

Command (M for help): p# Print partition tables

Disk/dev/SDB: 10.7 GB, 10737418240 bytes
255 heads, 63 sectors/track, 1305 Cylinders
Units = cylinders of 16065*512 = 8225280 bytes
Sector size (logical/physical): 512 bytes/512 bytes
I/O size (minimum/optimal): 512 bytes/512 bytes
Disk identifier: 0x68a3c8c6

Device boot start end blocks ID system

Command (M for help): H# Help
H: Unknown command
Command action
A toggle a bootable flag
B edit BSD disklabel
C toggle the DOS compatibility flag
D delete a partition# Deleting 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# Print partition tables
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# Saving partitions
X extra functionality (experts only)

Command (M for help): n# Add a partition
Command action
E extended # extended partition
P primary partition (1-4)# Primary Partition
P
Partition Number (1-4): 1# First Primary partition, Id 1
First cylinder (1-1305, default 1 ):
Using default value 1
Last cylinder, + cylinders or + size {K, M, g} (1-1305, default 1305): + 2G

Command (M for help): n
Command action
E extended
P primary partition (1-4)
P
Partition Number (1-4): 2# Second Primary partition, number 2
First cylinder (263-1305, default 263 ):
Using default value 263
Last cylinder, + cylinders or + size {K, M, g} (263-1305, default 1305): + 2G

Command (M for help): n
Command action
E extended
P primary partition (1-4)
P
Partition Number (1-4): 3# Third Primary partition, Number 3
First cylinder (525-1305, default 525 ):
Using default value 525
Last cylinder, + cylinders or + size {K, M, g} (525-1305, default 1305 ):+ 2G

Command (M for help): n# Extended partition, number 4
Command action
E extended
P primary partition (1-4)
E# Select extended partition here
Selected partition 4
First cylinder (787-1305, default 787 ):
Using default value 787
Last cylinder, + cylinders or + size {K, M, g} (787-1305, default 1305 ):
Using default value 1305

Command (M for help): p# Print partition tables

Disk/dev/SDB: 10.7 GB, 10737418240 bytes
255 heads, 63 sectors/track, 1305 Cylinders
Units = cylinders of 16065*512 = 8225280 bytes
Sector size (logical/physical): 512 bytes/512 bytes
I/O size (minimum/optimal): 512 bytes/512 bytes
Disk identifier: 0x68a3c8c6

Device boot start end blocks ID system
/Dev/sdb1 1 262 2104483 + 83 Linux
/Dev/sdb2 263 524 2104515 83 Linux
/Dev/sdb3 525 786 2104515 83 Linux
/Dev/sdb4 787 1305 4168867 + 5 extended

Command (M for help): n# Create the first logical partition for the extended partition
First cylinder (787-1305, default 787 ):
Using default value 787
Last cylinder, + cylinders or + size {K, M, g} (787-1305, default 1305): + 2G

Command (M for help): n# Create a second logical partition for the extended partition
First cylinder (1049-1305, default 1049 ):
Using default value 1049
Last cylinder, + cylinders or + size {K, M, g} (1049-1305, default 1305 ):
Using default value 1305

Command (M for help): p# Print the partition table with five available partitions (Extended partitions are used to create logical partitions)

Disk/dev/SDB: 10.7 GB, 10737418240 bytes
255 heads, 63 sectors/track, 1305 Cylinders
Units = cylinders of 16065*512 = 8225280 bytes
Sector size (logical/physical): 512 bytes/512 bytes
I/O size (minimum/optimal): 512 bytes/512 bytes
Disk identifier: 0x68a3c8c6

Device boot start end blocks ID system
/Dev/sdb1 1 262 2104483 + 83 Linux
/Dev/sdb2 263 524 2104515 83 Linux
/Dev/sdb3 525 786 2104515 83 Linux
/Dev/sdb4 787 1305 4168867 + 5 extended
/Dev/sdb5 787 1048 2104483 + 83 Linux
/Dev/sdb6 1049 1305 2064321 83 Linux

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

Calling IOCTL () to re-read partition table.
Syncing disks.
# Format the partition below and manually mount it to write the configuration file to/etc/fstab.
[[Email protected] ~] # Mkfs. ext4/dev/sdb1

To manually mount a partition, visit:

Http://zqxiang.blog.51cto.com/2806551/1572652

This article is from the "Network Technology" blog, please be sure to keep this source http://zqxiang.blog.51cto.com/2806551/1572653

Introduction to fdisk