Synology RAID 10 Recovery

Even though the RAID10 array type is considered very reliable because it survives a single drive failure with a 100% probability and a two-disk failure with a 66% probability (for a 4-drive device), there are still many reasons why you might need recover data.

The most common causes of RAID10 failures include:

  1. Failure of the NAS box
  2. RAID management driver failure
  3. File system failure
  4. Accidental NAS volume formatting

In all these cases, you are dealing with healthy disks, but you cannot access the data. To access the data, you need to use a special software for recovering data from Synology devices - ReclaiMe File Recovery. To recover data from Synology RAID10, you will need to disconnect the drives from the device and connect them to your computer separately. Since RAID10 uses a minimum of 4 drives, you may need to buy USB-to-SATA adapters, because the motherboard does not always have such a large number of free SATA ports. Also note that for RAID10 you can safely exclude one drive from the process. You can exclude even 2 disks, but in this case, if you do not guess the RAD0 pair, you may need to select the correct pairs. This will certainly significantly increase recovery time.

How to recover data from Synology RAID 10 using ReclaiMe

  1. Remove all drives from your Synology NAS and connect them to your Windows computer.
  2. Download, install and run ReclaiMe File Recovery.
  3. In the list of devices from ReclaiMe, identify the volume from Synology. Typically, it will be located under the BTRFS section. Launch scanning by clicking the Start button. If the required volume is not present or the volume from Synology is displayed as red, then skip a few steps and go to step 7.
  4. Data recovery from a Synology RAID10
  5. Wait until you receive a message that the Initial Scan is completed. At this moment the program pauses. You need to check the recovered data using the Preview function. If the files are displayed correctly in the Preview window and the size of the recovered data is as expected, then you can stop scanning and proceed to saving the recovered data. If you are not satisfied with the recovery result, continue scanning by clicking the Resume button.
  6. ReclaiMe software - file preview
  7. Buy an Ultimate license key and copy the data to another storage location. This could be another NAS or external drives.
  8. If you do not see the volume from Synology , or the volume is red, most likely the RAID10 array configuration is destroyed, and before restoring the files, you need to first restore the array configuration. To do this, download, install, and run the ReclaiMe Free RAID Recovery program.
  9. Select all Synology drives in the ReclaiMe Free RAID Recovery software window, click Other RAIDs and then select Start RAID10 or 01.
  10. Synology RAID10 recovery
  11. As soon as the software recovers the configuration, select the Run ReclaiMe to recover files option.
  12. In the ReclaiMe File Recovery software window that appears, select the volume from Reconstructed RAID and start scanning.
  13. Next, follow the recommendations described in steps 5 and 6.

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