In this comprehensive guide, you’ll learn how to create software RAID 1 on Oracle Linux. RAID 1, also known as mirroring, ensures data redundancy by duplicating data across two or more hard drives. It offers enhanced reliability and fault tolerance in case of drive failure, making it ideal for critical data storage.
Before diving into the process, let’s briefly discuss the differences between software RAID and hardware RAID. Software RAID vs Hardware RAID is a comparison worth considering to understand which option suits your needs best.
To create a RAID 1 array, you’ll need the following:
- Oracle Linux installed on your system.
- Two or more hard drives or SSDs of the same size and model for the RAID array.
mdadmpackage installed on your Oracle Linux system.
How to Create Software RAID 1 on Oracle Linux
Prepare the Hard Drives
Before creating the RAID array, it’s crucial to prepare the hard drives by creating partitions on them. You can use the
fdisk command to create partitions. In this example, we’ll use
/dev/sdc as our drives. Remember to replace these with the correct drive names for your system.
fdiskon the first drive:
sudo fdisk /dev/sdb
nto create a new partition, followed by
pfor a primary partition, and
1for the first partition. Press
Entertwice to accept the default start and end sectors.
- Change the partition type to
Linux RAID auto. Press
1to select the first partition, and enter
fdas the hex code for Linux RAID auto.
wto write the changes and exit
- Repeat steps 1-4 for the second drive (
Create the RAID 1 Array on Oracle Linux
With the partitions ready, you can now create the RAID 1 array using the
- Run the following command to create the RAID 1 array:
sudo mdadm --create --verbose /dev/md0 --level=1 --raid-devices=2 /dev/sdb1 /dev/sdc1
- Verify the RAID array creation by running:
sudo mdadm --detail /dev/md0
Create a File System
After creating the RAID array, you need to format it with a file system. In this example, we’ll use the
ext4 file system.
- Format the RAID array:
sudo mkfs.ext4 /dev/md0
Mount the RAID Array on Oracle Linux
To access the RAID array, you’ll need to mount it to a directory. In this example, we’ll use
- Create a mount point directory:
sudo mkdir /mnt/raid1
- Mount the RAID array:
sudo mount /dev/md0 /mnt/raid1
- To ensure the RAID array is mounted automatically at boot, add an entry to the
echo '/dev/md0 /mnt/raid1 ext4 defaults 0 0' | sudo tee -a /etc/fstab
Configure Email Notifications (Optional)
For better monitoring, you can configure
mdadm to send email notifications in case of RAID events or failures.
- Install the
sudo yum install -y mailx
- Edit the
sudo vi /etc/mdadm.conf
- Add the following line to configure the email address for notifications (replace
[email protected]with your email address):
MAILADDR [email protected]
- Save and exit the file.
- Update the
sudo mdadm --detail --scan | sudo tee -a /etc/mdadm.conf
Congratulations! You’ve successfully set up a software RAID 1 array on Oracle Linux. Your data is now protected by mirroring, providing fault tolerance and redundancy.
To learn more about managing your Oracle Linux system, check out our other guides:
- How to install PostgreSQL on Oracle Linux
- How to install VirtualBox on Oracle Linux
- How to set up a BIND DNS server on Oracle Linux
- How to install KVM on Oracle Linux
- How to install Ansible on Oracle Linux
If you have any questions or need further assistance, feel free to leave a comment below.