How to force hard disk format under Linux system

How to force format hard disk in Linux

When using Linux system, sometimes we need to format the hard disk in order to repartition or clear the data in the hard disk. This article will introduce how to force format a hard disk in a Linux system and provide specific code examples.

　1. Check the hard disk device

First, we need to check the hard disk device information to determine the hard disk device to be formatted. You can view it through the following command:

　# fdisk -l

This command will list all hard disk devices and their partition information in the system. Please note that this command needs to be executed as the root user or a user with sudo privileges.

　2. Unmount the hard disk

Before formatting the hard disk, you need to ensure that the hard disk is not mounted, otherwise the formatting will fail. You can unmount the hard disk through the following command:

　# umount /dev/sdx

　Among them, /dev/sdx represents the hard disk device to be unmounted.

　3. Forcibly format the hard disk

To forcefully format the hard disk, you can use the dd command. This command is a block-based command that can write specified data to the device or read data from the device.

The following is an example command to format a hard disk:

# dd if=/dev/zero of=/dev/sdx bs=512 count=1

Where, if represents the input file, of represents the output file, bs represents the number of bytes in each block, and count represents the number of blocks to be written. /dev/zero is a special file that can provide unlimited bytes of zeros.

This command will write a block of all zeros to the first sector of the hard disk, thereby clearing the original data on the hard disk. Please make sure to specify the correct hard disk device, otherwise data loss may occur.

　4. Repartition

Once the hard disk is formatted, it can be repartitioned. You can use the fdisk command to partition the hard disk.

The following is an example command for a partition:

# fdisk /dev/sdx

This command will open an interactive interface where you can use a series of commands to create Partition.

　-Enter the n command to create a new partition
　-Enter the p command to select the primary partition or extended partition
　-Enter a number to specify the partition number
　-Enter the start sector and end sector to Specify the partition size
　-Enter the w command to save the partition information and exit

After the partitioning is completed, you can use the mkfs command to format the new partition. The following is an example command to format a partition:

　# mkfs -t ext4 /dev/sdxn

　Among them, -t represents the file system type, and ext4 is a commonly used file system type. /dev/sdxn represents the partition to be formatted.

　5. Mount the hard disk

Finally, mount the new partition into the system. You can use the mount command to mount a partition.

The following is an example command to mount a partition:

mount /dev/sdxn /mnt

Among them, /dev/sdxn represents the partition to be mounted, / mnt is the mount point.

At this point, we have completed the process of forcibly formatting the hard disk in the Linux system. Please note that formatting the hard drive will erase all data, so please proceed with caution.

Final summary: This article introduces how to force format the hard disk in Linux system and provides specific code examples. During the operation, please make sure to back up important data and operate with caution to avoid data loss due to misoperation. Hope this article is helpful to you.

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