How to Recover Data from A Fusion Disk

Brithny updated on Sep 18, 2020 to Mac File Recovery | How-to Articles

Stop suffering from fusion disk data loss, we can help. EaseUS Mac data recovery software helps you recover deleted or lost files from fusion drive safely. Install it, scan the storage device, preview and recover your data.

Everything About Mac Fusion Drive

What is Fusion Drive? What's the difference between a Fusion Drive and an SSD or HDD? A Fusion Drive is a hybrid drive. It contains a hard disk drive and a solid-state drive. That's the manufacturer's way. Apple puts an SSD on the computer motherboard separately from the HDD and relies on macOS to integrate the two. But files aren’t stored separately on the two drives. The macOS interleaves data so that it’s effectively like one big drive. Fusion Drive has the following advantages:

  • The SSD and the hard drive are logically merged into a single block device.
  • A portion of SSD space is used as a write-back buffer to absorb incoming write traffic, which hides perceivable latencies and boosts write performance.
  • More frequently accessed data is stored on the SSD. The larger, less frequently accessed data is stored in the HDD.
  • If data has been on the HDD and suddenly becomes frequently accessed, it will usually get moved to the SSD by the program controlling the Fusion Drive. 

How to get the Fusion Drive? Not every Mac has the option of a Fusion Drive. You cannot find the drive on MacBook or Mac Pro. You can get it on most iMacs. Also, you can manually check if your Mac has a Fusion Drive.

Check "About This Mac" > "Storage". If it is a Fusion Drive, the information will show as "Hard Drive + Flash Storage" or "Fusion Drive".

the way to check out a fusion drive

Why Do You Lose Data on Fusion Drive

Fusion Drive may run into troubles just like any other storage device. Data loss situations can also happen on this drive:

  • Accidentally deleted files or formatted disk/partition
  • Virus attack or hardware failure 
  • Fusion Drive becomes unbootable
  • Separated Fusion Drive. The storage is presented as two drives instead of one

How to Recover Data from A Fusion Disk 

There are three ways to get back Fusion Disk data. You can use data recovery software, the backup or data recovery service.

1 - Use Mac Data Recovery Software

Is there a way to restore Mac Fusion Drive data? Yes, and the answer is EaseUS Mac data recovery software! This do-it-yourself solution is helpful when there isn't a backup. This program supports all major documents, photos, videos, and audio files. Lost Fusion Drive data is possible to recover with the help of EaseUS Data Recovery Wizard for Mac. Download this software and recover data from your drive.

Step 1. Select the Fusion Drive where you lost data and files. Click the "Scan" button.

select a location and click scan

Step 2. EaseUS Data Recovery Wizard for Mac will immediately scan your Fusion disk and display the scanning results on the left pane.

scan the selected Fusion disk to find lost data on your Mac

Step 3. In the scan results, select the file(s) and click the "Recover Now" button to get them back.

click recover now button to recover lost data on your Mac

2 - Use a Backup

If you have a backup of your Fusion Drive, you can recover data from the backup drive. It is a proactive method against any data loss disaster. 

Also Read: How to Backup Mac without Time Machine

3 - Use Data Recovery Service

This solution would cost a lot. If you are using data recovery service, then you need to send both the storage media that comprise a Fusion Drive to the service provider. 

How to Fix a Split Fusion Drive (Extra Tips)

If the Fusion Drive appears as two in the Finder, you can continue using the two drives independently, or follow these steps to fix a split Fusion Drive.

1 - Check whether there is a drive labeled as Fusion Drive.

  • If there is, and you do not need to do anything
  • If you see two drives (one with lower storage space and the other with higher). You need to create a single logical volume

2 - Create a Fusion Drive again.

Make sure that you have a backup before you start the steps below. Here we take macOS Mojave as an example.

Step 1: Turn on your Mac, press, and hold "Command-R" to start up from macOS Recovery. Release the keys when you see the Apple logo.

Step 2: Choose "Utilities > Terminal" from the menu bar.

Type diskutil resetFusion in the Terminal window, then press "Return".

Step 3: Type "Yes", then press "Return".

When Terminal indicates that the operation was successful, quit Terminal to return to the macOS utility window. Choose "Reinstall macOS", then follow the onscreen instructions to reinstall the Mac operating system. 

You will find that the Mac has created a Fusion Drive with reinstalled macOS and boots from the drive.

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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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