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This article introduces you how to carry out fdisk disk partition, the content is very detailed, interested friends can refer to reference, I hope to help you.

basis

fdisk: Disk partition table manipulation tool

fdisk can divide a disk into partitions and specify file systems for each partition: linux, fat32

Hard disk basic concepts:

head: a tool for reading and writing from a disk, double-sided reading and writing

A magnetized area on a magnetic disk.

sector: When a track is divided into sectors, each sector is called a sector, and each sector has a capacity of 512 bytes; the smallest unit of storage

cylinder consisting of tracks with the same number (0-n from outside); the smallest unit of partition

Disk capacity =(heads)*(cylinder)*(sectors/track)*512

Units: Capacity per magnetic cylinder

Zoning principles:

The total number of primary partitions (including extended partitions) cannot exceed 4, and extended partitions cannot be enclosed between primary partitions.

Primary partition: 1-4 (vda1/vda2/vda3/vda4)

Logical partition: 5-16

Disk Capacity = Primary Partition Capacity + Extended Partition Capacity

Extended partition capacity = sum of logical partitions

Logical partitions are optional. Unpartitioned logical partitions can only be partitioned into logical partitions.

Estimate whether a hard drive is completely partitioned

1. View magnetic cylinders

2. Whether the start of the partition is the previous end+1

3. The end of the last partition is the value of cylinders

fdisk Operating hard disk (adding partitions)

Select device: fdisk device (fdisk /dev/vda)

p: List partition information

n: Add partition: (Note partition size)

e: Extended partition

p: Main partition

w: Save Exit

Q: Do not save exit

restart

New partition format: mkfs.ext3 /dev/vda3

The new partition is mounted at: mount /dev/vda4/home/data

Note:

fdisk -l Partition x does not end on cylinder boundary:

This is because modern operating systems replace the old CHS (cylinder/head/sector addressing) by LBA (sector addressing).

Use: sfdisk -uS -l Sector-based partitioning

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