Issue with RAID Detection on Oracle Linux 9.4 after Upgrading from Oracle Linux 7.9 [closed]

Are you stuck with a frustrating issue after upgrading from Oracle Linux 7.9 to Oracle Linux 9.4? You’re not alone! Many users have reported a problem with RAID detection, where their system fails to recognize the RAID configuration. In this article, we’ll delve into the root cause of the issue, provide step-by-step instructions to resolve it, and offer insightful explanations to help you regain control over your RAID setup.

The Problem: RAID Detection Failure

After upgrading to Oracle Linux 9.4, many users have reported that their system fails to detect the RAID configuration. This can be a critical issue, especially in production environments where data redundancy and performance are crucial. The symptoms of this problem may include:

• RAID devices missing from the system
• Failure to boot from the RAID device
• Unrecognized or malfunctioning RAID arrays

What’s Changed in Oracle Linux 9.4?

Oracle Linux 9.4 brings several changes that might be contributing to the RAID detection issue. Some key changes include:

1. mdadm is replaced by mdraid
2. Changes in the kernel module loading mechanism
3. Updated udev rules for RAID devices

Resolving the Issue: A Step-by-Step Guide

Don’t worry; we’ve got you covered! Follow these instructions to resolve the RAID detection issue on Oracle Linux 9.4:

Step 1: Update mdraid

First, ensure you have the latest version of mdraid installed:

sudo dnf update mdraid

Step 2: Rebuild the initramfs

Rebuild the initramfs to ensure the kernel modules are loaded correctly:

sudo dracut -f

Step 3: Update udev Rules

Update the udev rules to recognize the RAID devices:

sudo udevadm control --reload-rules

Step 4: Re-Create RAID Arrays

Re-create the RAID arrays using mdadm. For example, to create a RAID 1 array:

sudo mdadm --create --verbose /dev/md0 --level=1 --raid-devices=2 /dev/sda1 /dev/sdb1

Step 5: Verify RAID Detection

Verify that the RAID device is detected correctly:

sudo mdadm --detail /dev/md0

Troubleshooting Tips and Tricks

If you’re still experiencing issues, try these additional troubleshooting steps:

Symptom	Solution
RAID device not detected	Check the kernel module loading order (sudo lsmod | grep mdraid) and ensure mdraid is loaded before mdadm.
RAID arrays not recognized	Verify the mdadm.conf file (sudo mdadm --examine --config=mdadm.conf) and ensure the array definitions are correct.
udev rules not applying	Check the udev log (sudo journalctl -u udev) for errors and ensure the rules are being applied correctly.

Conclusion

With these steps and troubleshooting tips, you should be able to resolve the RAID detection issue on Oracle Linux 9.4 after upgrading from Oracle Linux 7.9. Remember to carefully review the changes introduced in Oracle Linux 9.4 and adjust your configurations accordingly.

By following this guide, you’ll be back in control of your RAID setup, ensuring data redundancy and performance for your critical applications.

Additional Resources

For more information on RAID configurations and troubleshooting, refer to the following resources:

• Oracle Linux 9 Documentation: Creating and Managing RAID Devices
• mdadm Documentation: Creating and Managing RAID Arrays

Don’t hesitate to reach out if you have any further questions or concerns. Happy troubleshooting!

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