30/09/2026
What happens when important company folders disappear after a NAS power interruption?
In this real Synology DS220+ case, the NAS used RAID 1 with two WD Red drives to store financial data.
After the power interruption, some folders disappeared.
The surprising part?
Both hard drives were healthy.
The problem was associated with filesystem and metadata errors.
The client then attempted to restore the missing files from the NAS Recycle Bin. At that point, new write activity created an additional risk where the existing data in data sectors could potentially be replaced.
Our recovery process therefore started with:
• Read-only, sector-by-sector imaging
• Deep logical scanning
• Metadata and file-signature analysis
• Client verification
Some data had already been overwritten.
But the majority of the critical financial data was successfully recovered.
If important NAS data suddenly disappears, stop writing to the volume before attempting further recovery.
STOP → PRESERVE → DIAGNOSE