How to recover data from TrueNAS
If your TrueNAS has failed and you need to recover data from the pool, follow the instructions below.
Since TrueNAS uses ZFS as a disk space and filesystem driver, the recovery process involves ZFS recovery actions.
- First visit the ReclaiMe Pro website and download the latest build.
The demo version allows to do the TrueNAS recovery in full except copying the recovered data.
- Once installed, launch ReclaiMe Pro.
- Next select the highlighted options for ZFS scanning. Since we use disk images in the recovery, we need to load them as well.
- Click Proceed.
- If metadata records are ok or slightly damaged, you see your ZFS/TrueNAS volume in the list. Select it and click Start scan to launch filesystem scan.
- ZFS file system will be automatically selected in the list of file systems. Just click OK and then Start.
- You can also enable automatic saving of state files.
In case of any failure, you can load them at startup to resume the scan from the point where the save state file was made.
- Wait till ReclaiMe Pro displays the message about the initial scan completion and then check the recovered files in preview.
If the files are good, copy them.
- In case the files are corrupted or there is no ZFS/TrueNAS volume in the list after scanning the disks, try the deep ZFS recovery.
Select all available disks from the ZFS pool and click the Find ZFS button.
- In the pop-up window, click the No button, since the disks are from TrueNAS, not QNAP.
- Wait till the end of the initial phase scan.
- Once the scan done, ReclaiMe Pro displays the reconstructed ZFS volume. Select it and start scanning the datasets.
- Once opening data sets completed, select a dataset and start the file system scan.
- Wait till the initial ZFS filesystem scan completed and check files in preview.
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