25 Years of RAID Expertise | Trusted by Home Users, SMEs & Corporates
With over two decades of experience, Coventry Data Recovery has earned a reputation as the leading RAID 1 data recovery service provider in the UK. Whether you’re a home user, business, or government agency, our expert RAID engineers deliver precision recovery from mirrored RAID arrays, regardless of failure complexity.
🔧 About RAID 1 Systems
RAID 1, known as disk mirroring, stores identical data across two or more disks to increase fault tolerance. While this setup provides redundancy, it is not immune to data loss. Common failures include simultaneous disk failure, array rebuild corruption, or controller malfunction — all of which can result in inaccessible or lost data.
🛠️ Common RAID 1 Disk Errors We Recover From
Below are 20 of the most common RAID 1 issues we successfully recover data from, along with our technical approach to each:
1. Simultaneous Drive Failure
Cause: Power surge, firmware bug, or ageing disks.
Recovery Process: Clone each drive independently, compare mirrored data blocks, and reconstruct logical volume.
2. RAID Controller Failure
Cause: Electrical failure or firmware corruption in the RAID controller.
Recovery Process: Remove RAID controller dependency and manually reconstruct RAID geometry.
3. Logical File System Corruption
Cause: Sudden power loss or software crash.
Recovery Process: Use file system repair tools and deep sector scanning to reconstruct directory structures.
4. Inconsistent Data Between Mirrors
Cause: Silent write failure on one drive.
Recovery Process: Cross-verify data between mirrored disks using hash checksums to rebuild a clean image.
5. Disk Reordering Error During Reassembly
Cause: Misidentifying primary vs secondary disk.
Recovery Process: Identify proper drive order using metadata signatures, then manually map sectors for alignment.
6. Bit Rot / Silent Data Corruption
Cause: Gradual NAND degradation or magnetic decay.
Recovery Process: Rebuild corrupted files using pattern analysis and parity emulation (if available).
7. Deleted Volume on One Drive
Cause: Accidental initialisation or format.
Recovery Process: Rebuild partition tables using hex analysis and recover file system from the healthy mirror.
8. Failed Rebuild Operation
Cause: Attempting to rebuild with a mismatched or failing drive.
Recovery Process: Isolate both disks, clone sectors, and manually synchronise data sets.
9. Bad Sectors on Both Disks
Cause: Ageing hardware or write head damage.
Recovery Process: Sector-level imaging using hardware-assisted tools with error-skipping and ECC correction.
10. Firmware Bug Affecting Synchronisation
Cause: Vendor-specific firmware issue.
Recovery Process: Bypass firmware dependency by accessing drives in safe mode or via microcontroller replacement.
11. Corrupt Partition Table (GPT/MBR)
Cause: Malware, system crash, or human error.
Recovery Process: Manually rebuild partition schema using GUID signature detection.
12. Drive Not Detected in BIOS/UEFI
Cause: PCB failure or power regulation issue.
Recovery Process: PCB replacement and EEPROM transplant for disk identity preservation.
13. Accidental Disk Formatting
Cause: User or OS-level reinitialisation.
Recovery Process: Partition signature analysis and non-destructive recovery of file system metadata.
14. RAID Metadata Corruption
Cause: Failed rebuild or system crash.
Recovery Process: Manual interpretation of RAID header structures to extract disk order and mirroring scheme.
15. Mechanical Failure on Both Drives
Cause: Simultaneous physical damage (e.g., fire or flood).
Recovery Process: Cleanroom platter swap and head stack transplant followed by low-level imaging.
16. Volume Won’t Mount
Cause: Journal or boot block corruption.
Recovery Process: Deep file carving and file system reconstruction via disk image.
17. Controller Doesn’t Recognise RAID Array
Cause: Controller failure or RAID signature loss.
Recovery Process: Manually define stripe size, block order, and mirroring sequence in custom recovery software.
18. Encrypted Volume Inaccessible
Cause: Damaged encryption header or lost key.
Recovery Process: Header repair and cryptographic analysis (user input required for decryption keys).
19. SSD-Based RAID 1 Degradation
Cause: NAND wear and read-only mode activation.
Recovery Process: Chip-off extraction and logical data rebuild from multiple memory dumps.
20. Operating System Crash Mid-Write
Cause: Sudden reboot or driver-level hang.
Recovery Process: Undo incomplete file operations via transaction log reconstruction and rollback analysis.
🖥️ Supported Systems & RAID Hardware
We recover data from any RAID 1 configuration including:
✅ Supported Systems
- Windows Server 2012 – 2022
- macOS (including Fusion Drive-based RAID)
- Linux (mdadm, LVM, ZFS)
- Unix, FreeBSD, Synology DSM
✅ Top RAID 1 Brands We Support
- Dell EMC
- HPE (Hewlett Packard Enterprise)
- Synology
- QNAP
- NetApp
- Western Digital
- Seagate
- Buffalo
- Drobo
- IBM
- Promise Technology
- Intel
- Lenovo
- ASUS
- Areca
📊 Top 15 NAS & Rack RAID Platforms (RAID 1 Compatible)
NAS Systems (UK Top Sellers)
- Synology DS220+
- QNAP TS-231K
- WD My Cloud EX2 Ultra
- Buffalo LinkStation 220
- Netgear ReadyNAS 212
- TerraMaster F2-221
- LaCie 2big RAID
- Asustor Drivestor 2
- Zyxel NAS326
- Lenovo Iomega ix2
- Seagate IronWolf NAS
- WD Red NAS
- Thecus N2350
- Synology DS118
- QNAP TS-251D
RAID 1 Rack Servers
- Dell PowerEdge R240
- HP ProLiant DL20 Gen10
- Lenovo ThinkSystem SR250
- Supermicro SuperServer 5019C
- Intel R1208WFTYS
- IBM x3250 M6
- QNAP TS-431XeU
- Synology RackStation RS1221+
- Netgear ReadyNAS 3138
- Buffalo TeraStation 7120r
- Promise VTrak D5800
- ASUS ESC8000 G4
- Areca ARC-8050T3
- Seagate Exos AP
- WD Sentinel RX4100
🧰 Why Choose Coventry Data Recovery?
- 25 Years in RAID Recovery: Proven expertise in RAID mirroring systems.
- In-House Cleanroom Facility: For physical disk repair and imaging.
- Advanced Tools: PC-3000, DeepSpar, MRT Labs, and custom Linux recovery rigs.
- No Fix – No Fee Policy: Transparent recovery success conditions.
- 24–48 Hour Emergency Service: Available for time-critical recoveries.
🔐 Begin Your RAID 1 Recovery Today
- Contact our team for a free technical consultation.
- Send or drop off your RAID system securely.
- We perform a complete diagnostic and provide a detailed recovery plan.
- On approval, our engineers begin recovery, with full verification of retrieved data.
Coventry Data Recovery – Specialists in RAID 1 Disk Recovery and Mirrored System Reconstruction
Let us help you recover what’s irreplaceable.