Everything About RAID 1

RAID 1 refers to an exact copy (or mirror) of a set of data on two or more disks. According to Wikipedia, it seems that the RAID 1 configuration provides parity, striping or spanning of disk space across multiple disks. This is useful when read performance or reliability is more important than data storage capacity. RAID 1 writes two copies of the data simultaneously on two separate drives. This is called a fault-tolerant. When one of the mirrored drives suffers a mechanical failure such as spindle failure or does not respond, the remaining drives will continue to function. The RAID 1 configuration is performed either by a hardware RAID controller or performed in software. It is suited to applications requiring high fault tolerance at a low cost and where a duplicated set of data is more secure than using parity. RAID 1 is popular for accounting and other financial data. It is also commonly used for small database systems, enterprise servers, and home PCs where fairly inexpensive fault tolerance is required.


  • Fast speed. RAID 1 offers an excellent read-and-write speed that is comparable to that of a single drive.
  • Large storage. It’s known that RAID arrays usually consist of two or more disks. RAID 1 has much more storage space than a single drive. 
  • Continuous system running. On a computer that contains only one hard drive, if the drive fails, the operating system will stop at once. However, in a RAID array, if a hard disk fails, the system will be able to keep running normally for a certain time. 


  • The effective storage capacity is only half of the total drive capacity because all data get written twice.
  • The failed drive can only be replaced after powering down the computer it is attached to. For servers that are used simultaneously by many people, this may not be acceptable. Such systems typically use hardware controllers that do support hot-swapping.

Why You Lost RAID 1 Data

Although it seems that RAID 1 disk can be an ideal tool for storing and backing up data with a high fault-tolerant feature. But when data loss issues happen to the RAID 1 disk or RAID 1 volume, what can you do? Here the following are some major reasons for RAID 1 data loss issues:

  • 1. RAID 1 disk failure
  • 2. RAID 1 disk rebuild
  • 3. Format RAID 1
If the RAID 1 drive got physical damaged or the RAID 1 drive controller got broken, you'll not be able to get lost data back then.

So how to restore RAID 1 data? When you lost important RAID 1 data in Windows 10/8/7, stop using it immediately. Ane let professional RAID 1 data recovery software to help. 

Download RAID 1 Recovery Software for Help

EaseUS Data Recovery Wizard is a professional RAID 1 recovery program. It recovers data when you encounter partition loss or damage, software crash, virus infection, unexpected shutdown, or any other unknown issues. It provides the comprehensive RAID 1 recovery solution for computer users to recover data from RAID 1. If you lost RAID 1 data are less than 2GB, let free data recovery software help you now. If lost RAID 1 data is over 2GB, then you'll need EaseUS Data Recovery Wizard Pro for help. Moreover, this RAID 1 recovery software works well with dynamic disk, RAID, and EXT2/EXT3 file systems.

 Download for Win Recovery Rate 99.7%
 Download for Mac Trustpilot Rating 4.7

Most importantly, it can recover lost files with their original file names and storage paths - which other apps cannot do. It also works as a hard drive recovery tool from EaseUS to rescue your files and save you money!

EaseUS RAID Data Recovery Services

Click here to contact our experts for a free evaluation

Consult with EaseUS data recovery experts for one-on-one manual recovery service. We could offer the following services after FREE diagnosis. Our decades-experienced engineers are knowledgeable and can repair the damaged RAID structure and restore data from all RAID levels.

  • Restore data from all RAID levels, including RAID 0, RAID 1, RAID 5, RAID 6, RAID 10, etc.
  • Recover data from enterprise RAIDs such as QNAP, Synology, WD, Buffalo, etc.
  • Retrieve lost RAID data caused by any issues
  • Fix disks that become GPT protected partitions
  • Recover data from RAID remotely, no need to ship

Steps to Recover RAID 1 Data with RAID 1 Data Recovery Software (for Win)

Step 1. Scan the RAID drive

Choose the RAID drive from which you wish to recover data, and then click "Search for Lost Data". Wait for the scanning process to finish, the deleted files will show up one by one.

choose the raid hard drive

Step 2. Find and preview lost RAID files

You can use "Filter" as quick navigation to find deleted or lost files. Besides, you can also use Search to find your lost RAID drive files via its file name or file extension.

scan the RAID drive

Step 3. Restore lost RAID drive files

Select the wanted files and click "Recover". Browse to save these files to another secure location.

💡Tip: You can restore data on the local disks, external hard drives, and also the cloud storage.

recover data from the RAID drive

Also, watch the video tutorial about RAID 1 data recovery. Why not download this raid 1 recovery software to experience the magic recovery functions now.

RAID 1 Data Recovery for Mac

If you lost RAID 1 data on Mac, what can you do? Finding Mac RAID 1 recovery software is usually more difficult than finding software for Windows. In fact, EaseUS can also help. RAID is composed of multiple disks. If the RAID structure is intact, you will be able to recover data from the virtual disk created on the RAID with EaseUS Mac data recovery software.

Step 1. Search for lost files

Select the disk location to search for lost files (it can be an internal HDD/SSD or an external hard drive) where you lost data and files. Click the "Search for lost files" button.

Note: Before data recovery, you'd better click "Disk Backup" from the left sidebar to create a backup of your HDD/SSD to avoid further data loss. After backing up, the software can recover data from your disk backup, and you can use the HDD or SSD again.

Recover Data Step1

Step 2. Go through the scanning results

This software will immediately scan your selected disk volume and display pictures, documents, audio, videos, and emails on the left pane.

Recover Data Step2

Step 3. Select the file(s) and recover

Click the data to preview, and click the "Recover" button to have them back.

Recover Data Step3

People Also Ask

1. What is RAID recovery?

RAID recovery is the process of data recovery from a RAID array that failed for whatever reason. EaseUS data recovery software is a powerful data recovery tool that can successfully recover RAID data.

2. Can a RAID 1 disk be read on its own?

Yes, most RAID 1 systems create disks that are readable separately when connected to a non-RAID controller. 

3. What is the difference between RAID 0 and RAID 1?

RAID 0 consists of striping, but no mirroring or parity. RAID 1 consists of data mirroring, without parity or striping.

4. Can RAID 1 have more than 2 drives?

Yes, a minimum of two disks is required for RAID 1 hardware implementations. With software RAID 1, instead of two physical disks, data can be mirrored between volumes on a single disk.

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Updated by Brithny

Brithny is a technology enthusiast, aiming to make readers' tech lives easy and enjoyable. She loves exploring new technologies and writing technical how-to tips. In her spare time, she loves sharing things about her game experience on Facebook or Twitter.

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Approved by Evan Galasso

Evan Galasso is a digital forensics and data recovery engineer with over 10 years of experience in the field. He presents opinions on the current state of storage media, reverse engineering of storage systems and firmware, and electro-mechanical systems of SSDs and HDDs.

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