When it comes to ensuring data redundancy and reliability, RAID 1 (Redundant Array of Independent Disks) is an excellent choice for server administrators and home users alike. This article will guide you through the process of how to create RAID 1 on OpenSUSE, using mdadm, a powerful and flexible tool for managing RAID arrays.
Preparing for RAID 1 Setup
Before diving into the RAID 1 setup process, make sure you have at least two hard drives or SSDs of the same size installed on your system. Additionally, ensure you have root access or administrative privileges. You can reset your root password if needed.
How to Create RAID 1 on OpenSUSE
Install mdadm on OpenSUSE
First, you need to install mdadm on your OpenSUSE system. Open a terminal and enter the following command:
sudo zypper install mdadm
Enter your password when prompted, and mdadm will be installed.
Partition the Disks on OpenSUSE
Now that mdadm is installed, you need to partition your disks on OpenSUSE. You can use the fdisk utility to create partitions. In this example, we’ll use
/dev/sdc as our two disks for RAID 1.
sudo fdisk /dev/sdb sudo fdisk /dev/sdc
Follow these steps for both disks:
nto create a new partition.
pfor a primary partition.
1for the partition number.
Entertwice to accept the default start and end values.
tto change the partition type.
fdto set the partition type to Linux RAID Auto.
wto write the changes and exit.
Create the RAID Array
With your partitions ready, it’s time to create the RAID 1 array. Run the following command:
sudo mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/sdb1 /dev/sdc1
This command creates a RAID 1 array with the name
/dev/md0, using the partitions
You can check the progress of the RAID 1 array creation with the following command:
Wait for the array to finish building before proceeding to the next step.
Format the RAID Array
Once your RAID 1 array is built, format it using the
sudo mkfs.ext4 /dev/md0
Mount the RAID Array
Create a new directory to mount your RAID 1 array:
sudo mkdir /mnt/raid1
Mount the RAID array to the newly created directory:
sudo mount /dev/md0 /mnt/raid1
To ensure that the RAID 1 array mounts automatically at boot, edit the
sudo vim /etc/fstab
Add the following line at the end of the file:
/dev/md0 /mnt/raid1 ext4 defaults 0 0
Save the changes and exit.
Configure mdadm on OpenSUSE
To make sure that your RAID 1 array is recognized and assembled correctly during boot, update the mdadm configuration file:
sudo mdadm --detail --scan | sudo tee -a /etc/mdadm.conf
This command appends the output of the
mdadm --detail --scan command to the
/etc/mdadm.conf file, ensuring that your RAID 1 array is correctly recognized during the boot process.
Test Your RAID 1 Array
To test your RAID 1 array, you can create a sample file on the mounted RAID 1 directory:
echo "This is a test file on RAID 1" | sudo tee /mnt/raid1/testfile.txt
Now, simulate a disk failure by removing one of the disks from the RAID 1 array. In this example, we’ll remove
sudo mdadm /dev/md0 --fail /dev/sdb1 sudo mdadm /dev/md0 --remove /dev/sdb1
Check the contents of the RAID 1 directory to ensure that your test file is still accessible:
You should see the output “This is a test file on RAID 1.”
To add the removed disk back to the RAID 1 array, run the following command:
sudo mdadm /dev/md0 --add /dev/sdb1
Monitor the rebuilding process with:
Wait for the rebuilding process to complete.
You have successfully set up a RAID 1 array on your OpenSUSE system using mdadm. RAID 1 provides data redundancy and fault tolerance, ensuring that your data remains safe even if one of the disks fails.
Now that you have a working RAID 1 setup, you may want to explore other Linux-related topics like how to manage software packages on OpenSUSE, how to install a LAMP stack on OpenSUSE, or how to set up an email server on OpenSUSE.