TestDisk review

If you use computers extensively there is a good chance that eventually you will be faced with a situation involving data loss. In cases where the data is important, you may be forced to attempt a recovery. In addition to relying on backups that you have taken to protect your system, there are a variety of data recovery tools available that can help you resolve the issue.

What is TestDisk?

TestDisk Review

TestDisk is a freeware data recovery tool developed and maintained by Christophe Grenier. It is fully Open-Source software and is distributed under the terms of the GNU General Public License. The application’s main purpose is to recover lost disk partitions and fix bootable disks that are no longer booting correctly. You can also use TestDisk to generate information concerning a corrupted drive which can be used for troubleshooting by technical support specialists.

PhotoRecA companion program called PhotoRec is more suited to recovering individual files, although that can be accomplished with TestDisk. It is included as a separate application in the TestDisk download.

One of the strengths of TestDisk is the wide range of filesystems that are recognized by the tool. It can recover lost partitions that employ these diverse filesystems on the TestDisk tutorial Windows, TestDisk tutorial Mac, TestDisk tutorial Unix and Linux platforms. The software also recognizes multiple disk partitioning schemes including:

  • Intel Partition Table (master boot record);
  • Apple Partition Map;
  • Sun Solaris Slice;
  • GUID Partition Table.

Pros and Cons of TestDisk

Let’s take a closer look at the features of this data recovery software and highlight some of its pros and cons.

Pros

#1
Price – TestDisk is OpenSource freeware that can be used and modified for free. The developer does accept donations to assist in his maintenance and support efforts.

#2
Operating system support – These programs support Windows, macOS, and many different Unix and Linux distributions.

#3
Filesystem and partition support – Many different filesystems and partition schemes are recoverable with TestDisk.

Cons

#1
User interface – TestDisk and PhotoRec are strictly command-line tools that are not particularly suited to users who favor a more graphical user experience. The tool is meant to be used by individuals with varying degrees of computer knowledge and skills, but novices may be limited to using the tool to gather data for technical support to review. An intuitive GUI such as that of Disk Drill simplifies the data recovery process and makes the tool more useful for the general computer user.

How to Download TestDisk

TestDisk and PhotoRec can both be downloaded from this site. There are a number of different downloads for various operating systems. Downloading the program should be fairly straightforward based on the OS that you are using.

For this article, the software was downloaded to a MacBook Air running macOS Mojave 10.14.5.

  1. Obtain TestDisk for the Mac. Clicking on the big green button offering TestDisk 7.1 resulted in a file named testdisk-7.1-WIP.mac_intel.tar.bz2 being saved to my Mac’s download folder.
  2. Click on the file to uncompress it which created a folder titled testdisk-7.1-WIP. Expanding that folder revealed a number of files including the executable files for TestDisk and PhotoRec.TestDisk for Mac

testdisk & photorec for data recoveryA note on running these programs on macOS computers. The first time you attempt to start the application you may need to modify your security settings if you are restricting apps from unknown developers from running. I had to perform this task for both TestDisk and PhotoRec, but only for their initial execution.

A Step-by-Step TestDisk Tutorial

TestDiskWe will perform this TestDisk tutorial using a MacBook Air circa 2015 running Mojave. The disk we will use to test the software on is a Wilk USB disk with a capacity of 16GB. The disk is partitioned into two 8GB partitions named, aptly enough, partition1 and partition2.

Each partition had about 50% of its capacity used as I simply copied over the contents of my current Download folder to each partition so there was something to test. Then I put on my “bad user” hat and acted out a typical scenario that can lead to the need for data recovery software.

testdisk & photorec for data recovery

While trying to learn more about the Disk Utility application I “inadvertently” erased partition2, losing close to 4GB of data in the process. Human error in action.

We will use TestDisk in an attempt to recover partition2 and the data it contained.

These are the steps used in this data recovery exercise:

  1. Start TestDisk.
  2. Select "Create" to create a new log file.TestDisk
  3. Enter your administrator’s password when prompted. When you are returned to the program you see a message indicating that there is no warranty with this freeware.
  4. Select the disk to be recovered. No partition on the disk can be mounted. In my case, I needed to go into Disk Utility and unmount the partitions.TestDisk review
  5. Select the partition table type. EFI GPT was pre-selected as TestDisk had detected that type of partition.TestDisk tutorial
  6. Select "Analyze" to see the disk structure.TestDisk for Mac
  7. When the disk analysis is complete your disk structure is available for review.
  8. Perform a "Quick Search" for the missing partition. This was unsuccessful. testdisk & photorec for data recovery
  9. Follow-up with a "Deeper Search" to find the missing partition.TestDisk
  10. Select the partition that will be recovered and press "Write".TestDisk review
  11. Proceed with the recovery by following the prompts. As a result, your lost partition will be written to the source disk and you will be able to access it in Finder.TestDisk review

testdisk & photorec for data recoveryDespite having to refer to the TestDisk Guide webpage numerous times, I was eventually able to navigate through the command-line structure to perform the partition recovery. It was certainly not an enjoyable experience and I suspect that many users would have given up and searched for another alternative to fix their lost partition. Luckily, such an alternative exists.

Best TestDisk Alternative – Disk Drill

TestDisk for MacYou may like the free command line tools TestDisk and PhotoRec for your data recovery needs. It certainly can be useful in certain situations. We believe that Disk Drill offers a superior solution for data recovery needs on macOS and Windows machines.

Here are some of Disk Drill’s features that led us to this conclusion

#1 Intuitive user interface
Disk Drill does not require you to type in arcane commands. You can start recovering data with a few clicks using its graphical interface.

#2 Ease-of-use
Related to the user interface is the ease with which you can navigate and use Disk Drill’s features. This includes the ability to pause a scan or recovery and resume it at a later time with a single click.best recovery software
When faced with a data loss situation, performing a simple recovery method is preferred over a complex one. In order to get the most out of TestDisk, you need to have a considerable amount of knowledge concerning disks and their formats. This is not the case with Disk Drill. Its advanced technology is nicely hidden behind the intuitive interface.

#3 Advanced scanning algorithms
Disk Drill’s scanning algorithms can detect files and file fragments for hundreds of different file types.

#4 Enhanced data protection
Free data protection tools are included as part Disk Drill for Mac. Recovery Vault and Guaranteed Recovery protect your data from accidental deletion or data loss. Files protected by these utilities are easily recoverable through Disk Drill.

Recovering the Deleted Partition with Disk Drill

In comparison with my struggle attempting to recover the lost partition with TestDisk, the recovery process using Disk Drill was quick and painless. Here is the simple procedure that I followed.

  1. Download and install Disk Drill on my computer.
    Disk Drill
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  2. Launch the app.
  3. Select the disk to be recovered from the list of disks displayed by the application.best data recovery software
  4. Click "Recover" to start the scanning process.
  5. Review the recoverable files and select the files to be restored.
  6. Click "Recover" again to recover the files.best data recovery software

All of these steps were easily performed from within Disk Drill’s user interface by executing a few clicks. No need for navigating a command-line interface or typing in commands. With the exception of the fact that it is freeware, TestDisk is an inferior data recovery solution to Disk Drill. Individuals interested in a complete data recovery tool for macOS and Windows computers should definitely try it out.

Jeff Cochin

Jeff Cochin is a data management and recovery expert. He also serves as a technical writer, testing and reviewing tech solutions in various fields.Jeff Cochin is a professional data management, warehousing and recove...

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