The original post: /r/datahoarder by /u/Defozo on 2025-03-07 23:10:38.
I've encountered serious issues with my BTRFS file system on a Synology NAS, resulting in what seems like file system corruption. Initially, I tried to address this by cloning my original RAID5 array onto newer, larger disks and running built-in btrfs recovery commands, but unfortunately, these didn't yield any useful results.
Subsequently, I used UFS Explorer, which successfully located about 29 TB of data:
- Structured data: 27,807.98 GB
- Raw (unstructured) data: 2,296.43 GB
This is the full scan result in UFS Explorer:
While this result is encouraging, I'm concerned because my original NAS storage capacity was around 41.82 TB, and I strongly suspect I was using much more space than the 29 TB identified by UFS Explorer. Although the critical data I care about seems visible, my worry is missing or incomplete files that I'm not immediately aware of.
Here's my main concern:
- Is there a way within UFS Explorer (or another method/tool) to verify exactly how many files are unrecoverable or incomplete? I'm not sure how to confidently assess this from the UFS Explorer scan results.
Additional questions:
- Can UFS Explorer repair a corrupted BTRFS file system, or is its main functionality limited to file recovery (copying data out)?
- Would the best course of action now be to format my newly cloned disks, reconnect the original disks, and manually recover the data using UFS Explorer?
- Is there any advantage in continuing to try other tools, such as DMDE (which I'm already scanning with now), or consulting a professional data recovery service?
Any insight or experience shared would be greatly appreciated, as I'm anxious to ensure a thorough recovery without losing important files or data integrity.
Thanks in advance!