Recover Data from RAID 5 with 2 Failed Drives

Jean updated on Jan 21, 2021 to Storage Media Recovery | How-to Articles

EaseUS RAID recovery helps solve the conventional RAID 0,1,5,6,10 data recovery problems. For RAID 5 recovery, if you are trying to recover data from RAID 5 with two failed drives, you might need an effortful attempt, due to the number of failed drives has exceeded one. Read on to get the details.

Overview of RAID 5 Recovery

RAID is born to balance either the data redundancy or performance improvement, or both. So far, though many variations have involved such as nested RAID, the standard ones are RAID 0, RAID 1, RAID 5, RAID 6, and RAID 10. They are using different techniques to work in a specific situation. As a comparison, among the standard levels, it's the RAID 5 technology that reaps the benefits of enhanced data security, excellent performance, high data redundancy, and acceptable budgets.

  • RAID 0 - striping
  • RAID 1 - mirroring
  • RAID 5 - striping with parity
  • RAID 6 - striping with double parity
  • RAID 10 - combining mirroring and striping

Briefly speaking, this RAID type consists of at least 3 disks for correct work, and you can add up to a maximum of 16 if needed. To get the best result of RAID 5 data recovery, it's necessary to know how RAID 5 operates. As the image shows, data blocks are striped across the drives and on one drive a parity checksum of all the block data is written. The parity data are not written to a fixed drive, they are spread across all drives. Using the parity data, the computer can recalculate the data of one of the other data blocks, should those data no longer be available. That means a RAID 5 array can withstand a single drive failure without losing data or access to data.

raid 5 configuration

In conclusion, if 1 of 3 or above hard disks of RAID 5 becomes corrupted, damaged, or dead, no worry. Most renowned RAID recovery software can easily help you get the lost data back. But sometimes, it's not a single drive problem but two. How do you get over with it?

Can You Recover Data from RAID 5 with 2 Disk Failure?

One catastrophic disaster is having 2 out of 3 hard disks broke down, especially at the same time. It's never possible to retrieve data from RAID 5 under such a circumstance. If by chance you use 5 or more disks arrays, you can put yourself together and try EaseUS RAID hard drive recovery software.

How many hard drives failed Chance of data recovery
2 of 3 hard disks Zero
2 of 5~16 hard disks

It depends

1. The more hard disks you are using, the higher the chance of successful RAID 5 data recovery

2. The more properly you handle the situation (i.e. Turn off the PC or RAID controller, or stop any operation on the RAID), the more likely you can rescue data without damaging the integrity

EaseUS Data Recovery Wizard is known as the most dependable, powerful, and efficient software that supports to rescue lost data from PCs, laptops, digital devices, hard drive (HDD, SSD), removable storage media (USB pen drive, memory card...), server, RAID, etc. Besides the ability to recover data from a corrupted hard drive or failed hard drive on RAID 5, it can also help recover data from the lost partition on RAID 5 and other levels.

Connect both the failed hard drives to your computer, and follow the guide below for a free trial. You can preview the scan results of lost data on the hard drives before actual data recovery.

Step 1. Run EaseUS Data Recovery Wizard and scan the RAID drive.

Choose the RAID drive from which you wish to recover data, and then click "Scan". 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 drive files.

Find the lost Raid drive files from "Deleted Files", "Lost Files" or you can use Filter as quick navigation to find all 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 hard drive

Step 3. Restore lost RAID drive files.

Double-click to check and preview the found files, select these files and click "Recover" to save them. Browse to save these files to another secure location, click "OK" to confirm.

recover data from the raid hard drive
Do You Need Specialized Data Recovery Services?
You may need further help for tough data loss situations like reformatting drive, RAW disk, partition loss, repartition failures, and system boot error. Consult with EaseUS Data Recovery Experts for cost-efficient one-on-one manual recovery service. They could offer the following services after FREE diagnosis:
1. Unformat the drive
2. Repair the RAID, RAW disk or operating system
3. Recover lost partition (the one that cannot be recovered by software)

100% Raid 5 Data Recovery - Backup

Try to avoid two drives dying at once. As soon as one drive shows an amber light, stop writing new data or forcing RAID 5 array back online right away. For RAID 5 recovery under two failed hard drives, the EaseUS RAID recovery solution is the most time-saving and results-enhancing choice for quick and complete data recovery.

Though RAID 5 provides protection from a single drive failure, it's crucial to sense the danger of two hard disks malfunctioning at the same time, which makes the full data recovery so difficult, even by professional data recovery services. It's of utmost importance to regularly back up RAID with a proper backup plan. A handy backup can guarantee a 100% possibility for RAID 5 data recovery with 2 problematic hard drives, or even more. Meanwhile, prevent disastrous consequences from the primary reasons for losing data.

  • Malfunctioned controller
  • Lost or deleted RAID partition
  • Incorrect RAID volume configuration
  • Viral damage or malware infection
  • Sudden power outage

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Frequently Asked Questions

1. Why choose EaseUS Data Recovery Wizard?

"EaseUS Data Recovery Wizard is the best we've seen. It's far from perfect, partly because today's advanced disk technology makes data-recovery more difficult than it was with the simpler technology of the past, but it's fast and efficient..."PCMag

"The first thing you'll notice about EaseUS Data Recovery Wizard Pro is that its interface is very clear and uncluttered, with only a small collection of self-explanatory controls. You won't find lots of extra options hidden in a system of hidden menus, either; what you see really is what you get."techradar

"Recover lost files, even after deleting a partition or formatting your drive."Macworld

2. Why cannot I recover 2GB data for free?

It is recommended to check the version installed is Free or Trial because they are different versions.

Trial has data preview function but cannot save any files, while the Free version enables to recover 2 GB files. The default free space is 500 MB and you may share the product on social media to get another 1.5 GB.

3. Why cannot the recovered files be opened?

A file is saved as 2 parts on the storage device: directory info (which is comprised by file name, time stamp and size info, etc.) and data content.

If the files with original file names and folder structures cannot be opened, one possible reason is the corrupted directory info. There is still a chance to recover the data content with the RAW Recovery method in our software.

4. Why isn't it suggested to recover the files back to the original drive?

The storage structure of the lost files would be altered or damaged by any changes on the drive. If you save the recovered files back to the same drive, the original data structures and data content would be corrupted or overwritten, which causes permanent data loss. So you should prepare another disk to save the files.

5. How can I check whether my data is recoverable or not before purchase?

The Free version helps you save 2GB files, so verify the recovery quality of our product before purchase.

6. How long does it take to scan the drive?

It strongly depends on the capacity of your hard drive and the performance of your computer. As reference,most drive recoveries can be completed in around 10 to 12 hours for a 1-TB healthy hard drive in general conditions.

About Data Recovery Wizard

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