Identify the new disk using lsblk or fdisk -l to locate the correct device like /dev/sdb. 2. Optionally partition the disk with fdisk /dev/sdb, create a primary partition using default settings, and write changes with w, then run partprobe to update the kernel. 3. Create a filesystem using mkfs -t xfs /dev/sdb1 for XFS or mkfs -t ext4 /dev/sdb1 for ext4, ensuring the correct device is specified to avoid data loss. 4. Create a mount point with mkdir /mnt/mydisk and mount the filesystem using mount /dev/sdb1 /mnt/mydisk, then verify with df -h. 5. Make the mount persistent by adding an entry in /etc/fstab using the UUID obtained from blkid /dev/sdb1, such as UUID=a1b2c3d4-... /mnt/mydisk xfs defaults 0 2, and test with mount -a or mount -o remount /mnt/mydisk, confirming no errors occur before rebooting.
Formatting a new disk in CentOS involves several steps: identifying the disk, partitioning (optional), creating a filesystem, and mounting it. Here's a straightforward guide to get it done.
1. Identify the New Disk
First, list all available disks to find the new one:
lsblk
or
fdisk -l
Look for a disk (e.g., /dev/sdb) that has no existing partitions or data. Be very careful to select the correct disk—formatting the wrong one can result in data loss.
2. Partition the Disk (Optional)
You can create a partition using fdisk or parted. For a simple single partition:
fdisk /dev/sdb
Inside fdisk, follow these steps:
- Press
nto create a new partition. - Choose
pfor primary (or just accept defaults). - Accept default values for sectors (this uses the whole disk).
- Press
wto write the changes and exit.
After saving, run:
partprobe
to update the kernel with the new partition table. Your partition will typically be /dev/sdb1.
Note: If you don’t need partitions (e.g., for simple use), you can format the entire disk directly (e.g.,
/dev/sdb) without partitioning.
3. Create a Filesystem
Now format the partition (or whole disk) with a filesystem. Common choices are xfs (default in CentOS) or ext4.
For XFS:
mkfs -t xfs /dev/sdb1
For ext4:
mkfs -t ext4 /dev/sdb1
?? This step erases all data—double-check the device name.
4. Create a Mount Point and Mount the Disk
Create a directory where the disk will be accessed:
mkdir /mnt/mydisk
Mount the filesystem:
mount /dev/sdb1 /mnt/mydisk
Verify it’s mounted:
df -h
You should see the new disk in the list.
5. Make It Persistent Across Reboots
Edit /etc/fstab so the disk mounts automatically at boot.
First, get the UUID of the new filesystem:
blkid /dev/sdb1
Example output:
/dev/sdb1: UUID="a1b2c3d4-..." TYPE="xfs"
Add an entry to /etc/fstab:
UUID=a1b2c3d4-... /mnt/mydisk xfs defaults 0 2
Or, if you trust device names (less reliable):
/dev/sdb1 /mnt/mydisk xfs defaults 0 2
Test the fstab entry:
mount -o remount /mnt/mydisk
or
mount -a
No errors mean it’s good.
Summary of Key Commands
-
lsblk– list disks -
fdisk /dev/sdb– create partition -
mkfs -t xfs /dev/sdb1– format -
mount /dev/sdb1 /mnt/mydisk– mount - Update
/etc/fstab– make permanent
That’s it. Your new disk is formatted and ready to use. Just remember: always double-check the disk name before formatting. One typo can be costly.
The above is the detailed content of How to format a new disk in CentOS. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undress AI Tool
Undress images for free
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Difference between centos and ubuntu
Apr 14, 2025 pm 09:09 PM
The key differences between CentOS and Ubuntu are: origin (CentOS originates from Red Hat, for enterprises; Ubuntu originates from Debian, for individuals), package management (CentOS uses yum, focusing on stability; Ubuntu uses apt, for high update frequency), support cycle (CentOS provides 10 years of support, Ubuntu provides 5 years of LTS support), community support (CentOS focuses on stability, Ubuntu provides a wide range of tutorials and documents), uses (CentOS is biased towards servers, Ubuntu is suitable for servers and desktops), other differences include installation simplicity (CentOS is thin)
Centos shutdown command line
Apr 14, 2025 pm 09:12 PM
The CentOS shutdown command is shutdown, and the syntax is shutdown [Options] Time [Information]. Options include: -h Stop the system immediately; -P Turn off the power after shutdown; -r restart; -t Waiting time. Times can be specified as immediate (now), minutes ( minutes), or a specific time (hh:mm). Added information can be displayed in system messages.
Centos stops maintenance 2024
Apr 14, 2025 pm 08:39 PM
CentOS will be shut down in 2024 because its upstream distribution, RHEL 8, has been shut down. This shutdown will affect the CentOS 8 system, preventing it from continuing to receive updates. Users should plan for migration, and recommended options include CentOS Stream, AlmaLinux, and Rocky Linux to keep the system safe and stable.
Centos configuration IP address
Apr 14, 2025 pm 09:06 PM
Steps to configure IP address in CentOS: View the current network configuration: ip addr Edit the network configuration file: sudo vi /etc/sysconfig/network-scripts/ifcfg-eth0 Change IP address: Edit IPADDR= Line changes the subnet mask and gateway (optional): Edit NETMASK= and GATEWAY= Lines Restart the network service: sudo systemctl restart network verification IP address: ip addr
.NET Core Quick Start Tutorial 1. The beginning: Talking about .NET Core
May 07, 2025 pm 04:54 PM
1. The Origin of .NETCore When talking about .NETCore, we must not mention its predecessor .NET. Java was in the limelight at that time, and Microsoft also favored Java. The Java virtual machine on the Windows platform was developed by Microsoft based on JVM standards. It is said to be the best performance Java virtual machine at that time. However, Microsoft has its own little abacus, trying to bundle Java with the Windows platform and add some Windows-specific features. Sun's dissatisfaction with this led to a breakdown of the relationship between the two parties, and Microsoft then launched .NET. .NET has borrowed many features of Java since its inception and gradually surpassed Java in language features and form development. Java in version 1.6
Hadoop pseudo-distributed cluster construction
May 07, 2025 pm 04:45 PM
Software preparation I am using a virtual machine with CentOS-6.6, with the host name repo. Refer to the steps to install a Linux virtual machine in Windows, I installed JDK in that virtual machine, refer to the guide to installing JDK in Linux. In addition, the virtual machine is configured with a key-free login itself, and the settings for configuring key-free login between each virtual machine are referenced. The download address of Hadoop installation package is: https://mirrors.aliyun.com/apache/hadoop/common/. I am using hadoop 2.6.5 version. Upload the Hadoop installation package to the server and unzip [root@repo~]#tarzxv
Postman Integrated Application on CentOS
May 19, 2025 pm 08:00 PM
Integrating Postman applications on CentOS can be achieved through a variety of methods. The following are the detailed steps and suggestions: Install Postman by downloading the installation package to download Postman's Linux version installation package: Visit Postman's official website and select the version suitable for Linux to download. Unzip the installation package: Use the following command to unzip the installation package to the specified directory, for example /opt: sudotar-xzfpostman-linux-x64-xx.xx.xx.tar.gz-C/opt Please note that "postman-linux-x64-xx.xx.xx.tar.gz" is replaced by the file name you actually downloaded. Create symbols
Centos options after stopping maintenance
Apr 14, 2025 pm 08:51 PM
CentOS has been discontinued, alternatives include: 1. Rocky Linux (best compatibility); 2. AlmaLinux (compatible with CentOS); 3. Ubuntu Server (configuration required); 4. Red Hat Enterprise Linux (commercial version, paid license); 5. Oracle Linux (compatible with CentOS and RHEL). When migrating, considerations are: compatibility, availability, support, cost, and community support.
