At Bracknell Data Recovery, we specialise in advanced recovery from failed and unresponsive Synology NAS systems. If your DiskStation DS412+ is showing I/O errors, stuck in hibernation, or experiencing multiple drive failures, our engineers can help you recover your critical data—no matter how complex the failure.
Common Scenario: Synology DS412+ I/O Errors and NAS Unresponsiveness
User Issue:
After setting up two drives in a DS412+, one failed within a month. The other failed shortly afterwards. The NAS now won’t wake reliably, frequently shows I/O errors, and adding a third drive results in further system faults.
This is a classic example of degraded RAID performance, likely combined with file system or firmware-level corruption. Whether you were using Synology Hybrid RAID (SHR), RAID 1, or a basic volume setup, dual drive failure or metadata inconsistency can render your NAS unreadable.
Our Synology NAS Recovery Process – Step by Step
1. Drive-by-Drive Assessment & Imaging
- Each installed drive (new or old) is carefully removed from the DiskStation and subjected to a non-destructive diagnostic.
- Using our imaging hardware, we clone each drive sector-by-sector, even in cases of:
- I/O read errors
- Bad sectors
- Intermittent connectivity
- This ensures no risk to the original data during recovery.
2. RAID Reconstruction
- We reverse-engineer the original RAID or SHR layout:
- Determine RAID level (e.g. SHR, RAID 1, RAID 5)
- Identify correct drive order, block size, and parity rotation
- Virtually reconstruct the array using cloned images
- This step restores the logical structure that Synology’s DSM cannot mount due to corruption or failed drives.
3. Handling Hybrid RAID (SHR) Metadata Corruption
- SHR volumes often fail to mount if metadata or configuration files become damaged. Our engineers rebuild:
- LVM2 metadata
- mdadm or RAID superblocks
- btrfs or ext4 volumes
4. Data Extraction and File System Repair
- Once the RAID is rebuilt, we perform:
- File system checks and repairs (ext4, Btrfs)
- Logical recovery of deleted, corrupted, or partially written files
- Restoration of folder structure and user-specific data from DSM shares
5. File Verification and Delivery
- Extracted data is checked for integrity and completeness.
- You receive a file listing before we transfer your data to a new, verified medium.
Supported Synology NAS Models
We recover data from all Synology models, including:
- DiskStation DS220+, DS412+, DS923+, DS1522+
- RackStation RS1221+, RS422+, RS1619xs+
- Plus all legacy models (DS216, DS214, DS710+, etc.)
Supported RAID and Volume Configurations
- RAID Levels: SHR, RAID 0, RAID 1, RAID 5, RAID 6, RAID 10
- File Systems: ext4, Btrfs, iSCSI LUNs
- Drives: SATA, SAS, SSD
- Interfaces: USB 3.0, eSATA, Ethernet (diagnostics only)
Why Choose Bracknell Data Recovery?
- 25+ Years of NAS and RAID Data Recovery Experience
- Dedicated Synology Recovery Specialists
- Advanced Tools for SHR Metadata and LVM Repair
- Cleanroom Facilities for Failed Disk Work
- 48-Hour Critical Recovery Option Available
- Secure & Confidential Handling of Your Data
From firmware issues and sudden drive failures to I/O error storms and failed expansions, our synology nas data recovery service is the trusted solution for businesses and home users across the UK.
Contact Us for a Free Diagnostic
If your Synology DiskStation has become unresponsive or you’re seeing errors when trying to access your data, contact Bracknell Data Recovery today. Our experienced RAID engineers are ready to recover your files quickly, safely, and professionally.