Asustor Lockerstor NAS devices are commonly used by businesses, including food stores, for secure file storage and operational management. However, when a RAID 0 setup fails due to multiple disk failures, it results in complete data loss since RAID 0 offers no redundancy.
This case study details how we successfully recovered critical inventory, supplier records, and sales data for a local food store in Glasgow from a 4-disk Asustor Lockerstor NAS in a RAID 0 configuration, after two disks failed, causing the NAS to become unbootable.
As Glasgow Data Recovery, Scotland’s oldest and best data recovery company, we have 25 years of experience using RAID reconstruction, NAS firmware repair, and deep forensic data extraction techniques to restore lost business data.
Asustor Lockerstor NAS Won’t Boot Due to RAID 0 Failure
A Glasgow-based food store contacted us after their Asustor Lockerstor NAS stopped working, with the following issues:
- The NAS would not boot and displayed RAID errors.
- Two out of four RAID 0 disks had failed, rendering the entire array inaccessible.
- Attempts to repair or rebuild the RAID using NAS utilities failed.
- The NAS contained essential business data, including supplier records and sales reports.
Since RAID 0 does not provide redundancy, failure of even one disk results in complete data loss, requiring advanced forensic recovery techniques.
Diagnosis & Evaluation
When the Asustor Lockerstor NAS (4-disk RAID 0 setup) arrived at our cleanroom facility, we conducted a full RAID and file system diagnostic. Our findings:
- Two hard drives had mechanical failures, preventing the RAID from initializing.
- RAID 0 metadata was corrupted, making manual RAID reconstruction necessary.
- The NAS file system (EXT4/Btrfs) was partially recoverable, increasing the chances of data extraction.
Since re-attempting a RAID rebuild in RAID 0 can permanently erase remaining data, we prioritized manual RAID reconstruction and drive-level repair.
The Recovery Process
1. Cloning & Imaging All NAS Disks to Prevent Further Data Loss
To preserve all recoverable data, we:
- Created forensic sector-by-sector clones of the two functioning RAID disks.
- Used specialised tools to recover readable sectors from the two failed disks.
2. Reconstructing the RAID 0 Array & Restoring Corrupt Metadata
Since RAID 0 relies on striping without parity, we:
- Manually reconstructed the RAID 0 structure outside of the NAS system.
- Recovered missing RAID headers and partition tables.
3. Extracting & Verifying Business Data
Once the RAID 0 structure was successfully rebuilt, we:
- Recovered supplier invoices, sales records, and inventory tracking data.
- Restored financial spreadsheets, employee schedules, and operational reports.
- Transferred the fully restored data to a secure external backup device.
The Results: 92% Data Recovery Success
Thanks to our RAID 0 reconstruction and NAS data recovery techniques, we successfully recovered 92% of the food store’s lost business data, including:
✅ Supplier records, purchase orders, and financial invoices
✅ Inventory management and stock tracking spreadsheets
✅ Sales reports, employee work schedules, and customer order data
The food store was able to resume operations without losing essential records, preventing financial and operational disruptions.
Why Choose Us?
With 25 years of experience and tens of thousands of successful NAS recoveries, we are Scotland’s leading RAID and NAS data recovery specialists. Our expertise includes:
✔ Asustor Lockerstor RAID 0 failure recovery & metadata reconstruction
✔ NAS disk failure recovery & EXT4/Btrfs file system repair
✔ Business document, inventory record, and financial data retrieval
✔ Secure & confidential data recovery services
If your Asustor Lockerstor NAS has failed due to multiple disk failures, RAID corruption, or file system errors, stop using the device immediately and contact us for expert NAS data recovery.