A Beginner’s Guide to How to Fix Raid Failure

When a hard drive fails, the consequences are often disastrous. The drive is unusable, and you lose your data. The good news is that hard drive failures are fairly rare. The bad news? When it happens, it’s almost always the result of a hardware failure.

To prevent this from happening to your own drives, you need to know how to repair a failed RAID volume. This guide will show you the best practices for repairing a failed RAID volume, and how to avoid making the same mistakes as others.

How to Fix Raid Failure

To repair a failed RAID volume, you need to make sure that you find the right tools or raid data recovery services. You’ll need to have an external drive and a blank USB drive. The best way to recover data from a failed RAID volume is by copying it onto the external hard drive and then restoring it back onto the failed RAID volume. First, you’ll want to shut down the computer and disconnect all of your drives from it.

Then, plug in your external hard drive and start cloning the data on it onto your external hard drive. Next, connect your computer back up and turn it on. Make sure that you don’t start loading any software before going through the following steps.

1) Turn off all unnecessary programs on your computer

2) Plug the blank USB into one of the USB ports on your computer

3) Restart your computer while holding down the F8 key

4) You will see a screen

Avoid Overwriting the Bad Disk

One of the most common mistakes people make when trying to fix a failed drive is overwriting the bad disk. When you overwrite the bad disk, it also means that you’re deleting your data. To avoid this mistake, you need to first figure out what’s wrong with your RAID volume.

To do this, make sure that you have enough hard drives installed in your RAID volume for it to be functional. If your RAID volume has two disks and you have three hard drives installed in it, you won’t be able to fix a failed disk. It can happen with one or two drives as well.

Once you know how many disks are in your RAID volume and that there aren’t any hardware failures, find out which disk is bad by using fdisk or cfdisk . Next, write down the device name for each of the disks so you can replace them easily if needed later on. If you don’t remember which device number belongs to which disk, consult a repair manual or search online for documentation on what the device numbers mean.

Use Dedupe

Dedupe is a function of the RAID, which helps speed up the process of rebuilding the drive. Dedupe removes redundant data during the rebuild process, freeing up space for other files to be written on top of it. This also means that your RAID won’t need as much capacity.

This will make it easier for you to recover from a failed hard drive. If a drive fails and you have no more space on your RAID volume, simply using dedupe will allow you to continue restoring the data that was lost.

Use Different RAID Types

What’s the difference between RAID 0, RAID 1, and RAID 5? RAID 0 is a type of striped volume that combines two or more hard drives. Because it’s a striped volume, any data written to one drive is also written to all of the others.

This means if one drive fails, you still have access to everything on your other drives. However, because it stores identical data across every drive in the array, there are no performance benefits. RAID 1 is a mirrored volume that stores identical data across two or more hard drives. If one drive fails, you only lose half of the data on that particular drive. The good news with RAID 1?

The system will continue to function without fail.  RAID 5 works similarly as RAID 1 with one major difference: instead of storing identical data across two drives, it stores identical data across five. This means if a single hard drive in an array fails, you still have access to all of your information—just not exactly at the same location as before.

Avoid Using the Same RAID Volume for Rebuilding

One of the most common mistakes made when repairing RAID volumes is to use the same drive for rebuilding. This is a mistake because the drives have been through a lot and have already failed once. The risk of them failing again is high, so it’s best to find a new hard drive and start fresh.

Another mistake people make is to try and fix RAID failures by using software that isn’t designed for this purpose. When you use software that isn’t designed for this task, you’re at risk of making other mistakes, such as corrupting data or limiting access to your data.

Wrapping a Drive-in Aluminum

All hard drives in a RAID volume are connected to the same controller. If one drive fails, the controller can’t tell which drive failed and instead thinks that all of them failed. This is because they all share the same view of the storage pool.

To fix this, you need to wrap each drive-in aluminium foil to give it a unique identifier that no other drive shares. This will make it easier for you to identify which drive is failing, so you can replace it before losing your data.


This article is a great guide for beginners on how to fix raid failure. The article explains the different methods for fixing raid failure; it also provides general advice on how to avoid overwriting the bad disk during a raid rebuild.