NAS Server Data Recovery
Having problems with your NAS server? Whether it's software issues or physical damage, our team with years of experience is ready to safely recover your valuable data.
NAS Data Recovery – Safe and Efficient
Is your NAS server experiencing software problems or physical damage? Our professionally trained team and state-of-the-art laboratory equipment are ready to safely and efficiently handle various failures, including mechanical and electronic problems on NAS servers.
We provide diagnostics for €45 (European pickup included) and after careful assessment of the damage, we'll quote you a price for data recovery. With over 20 years of experience and certified tools like ACELab and Cellebrite, we handle even complicated cases.
Our NAS data recovery services are available 24/7, for all common and specific devices, including <strong>RAID arrays</strong>.
If you have a damaged NAS device, we recommend not turning it on and not making any changes – this reduces the risk of data loss. Contact us as soon as possible so we can professionally assess the situation and suggest the best solution for your data recovery.
Overview of common failures:
Software Failures
| Damage | Cause and symptoms |
|---|---|
| Software failures |
|
| Disk configuration loss |
|
Hardware Failures
| Damage | Cause and symptoms |
|---|---|
| Disk controller failure |
|
| One or more faulty hard drives |
|
Data recovery from all NAS configurations and file systems
We can assemble and manage common and advanced configurations for NAS devices, including RAID 0, RAID 1, RAID 5, RAID 6, and RAID 10. Each of these types offers specific benefits and levels of data protection:
- •RAID 0 (striping): Offers fast data access but without redundancy.
- •RAID 1 (mirroring): Mirrors data for higher security, protects against single disk failure.
- •RAID 5: Uses striping with parity, allowing data recovery when one disk fails and provides a balance between capacity and protection.
- •RAID 6: Double parity allows recovery when up to two disks fail, suitable for larger disk arrays.
- •RAID 10 (1+0): Combines mirroring and striping, provides high performance and data protection, but requires at least four disks.
Besides RAID configurations, we support various file systems that NAS devices typically use, such as EXT4, Btrfs, NTFS, ZFS, APFS. This variability allows us to flexibly respond to different types of failures and recover data from a wide range of NAS devices.
Most common causes of NAS device failure
NAS servers are complex devices combining hardware and software. Failures can occur at various levels and have different causes. Our laboratory encounters these most common problems:
Mechanical disk failures
- •Torn read heads – often caused by impact or fall of the NAS server
- •Damaged platters – can occur after head contact with disk surface
- •Motor bearing wear – typical for older or overloaded NAS
Electronic failures
- •Burnt control electronics – caused by power surge or power outage
- •Disk controller failure – NAS won't start or doesn't recognize disks
- •NAS motherboard damage – requires repair or replacement
Software problems
- •Crypto virus attack (ransomware) – data encryption without access
- •NAS operating system crash – after unsuccessful firmware update
- •File system damage – data is inaccessible
RAID array problems
- •RAID array breakdown – multiple disks failed at once
- •Disk configuration loss – NAS stops seeing the data volume
- •Incorrect RAID reconstruction – after faulty disk replacement
Data recovery from NAS servers of all brands
We have experience with data recovery from NAS servers of all leading manufacturers. Each manufacturer uses a specific operating system and file system, but our laboratory is equipped with tools to work with all common platforms.
Synology (DSM)
The most widespread NAS brand in home and business environments. Uses DiskStation Manager (DSM) operating system and most commonly Btrfs or ext4 file systems. We solve common problems like SHR (Synology Hybrid RAID) breakdown, DSM damage after update, or ransomware attack.
QNAP (QTS)
The second most popular brand, known for powerful hardware. QTS operating system supports ext4, Btrfs and ZFS. We specialize in data recovery after volume failure, RAID array reconstruction and recovery after malware attack.
Other supported brands
- •Western Digital (My Cloud) – home NAS solutions
- •Asustor – professional NAS with ADM system
- •TerraMaster – affordable NAS
- •Drobo – with proprietary BeyondRAID technology
- •Buffalo (LinkStation, TeraStation) – business NAS solutions
- •Netgear ReadyNAS – with X-RAID technology
What to do when NAS server fails?
1
Turn off the NAS server immediately
If the NAS makes unusual sounds (clicking, beeping), disks are not recognized, or the device is inaccessible, disconnect it from power immediately. Further operation can cause irreversible data damage, especially with mechanical disk failures.
2
Don't attempt self-repair
Don't remove disks from the NAS, don't change their order, and don't attempt RAID array reconstruction. Software repair attempts can overwrite important structures needed for recovery. Physical manipulation of damaged disks outside a clean environment causes further damage.
3
Contact us for diagnostics
Our courier will pick up the NAS server across Europe for €45 (diagnostics free). In some cases with obvious mechanical damage, sending only the hard drives is sufficient. After diagnostics, we'll tell you the extent of damage, chance of successful recovery, and exact price – which is binding and you only pay on success.
Our success rate for NAS server data recovery is around 90%. Thanks to professional equipment and over 35 years of experience, we can recover data even from complex cases, including broken RAID arrays and physically damaged disks.
Supported NAS devices
| Vendors | Synology, QNAP, Western Digital (My Cloud), Netgear (ReadyNAS), ASUSTOR, Thecus, Buffalo, Drobo, LaCie, Apple Time Capsule |
|---|---|
| Configurations | RAID 0, 1, 5, 6, 10, SHR, SHR-2, JBOD, Drobo BeyondRAID, ZFS pools |
| File systems | EXT4, Btrfs, ZFS, NTFS, HFS+, XFS, proprietary vendor formats |
| Connectivity | Gigabit/10G Ethernet, USB 3.0/3.1, Thunderbolt (some models) |
What to do on NAS failure
Do not remove drives from the NAS and do not connect them individually to a PC — you can lose the array configuration.
Do not attempt rebuild if two or more drives have failed.
Power off the NAS and contact us — the fewer interventions, the better.
Do not update firmware on a damaged NAS device.
NAS appliance repair vs. data recovery
When a NAS device fails, the typical first impulse is to restore the appliance and continue operation. For simple failures (single disk in redundant RAID) this works — the NAS replaces the bad drive and rebuilds automatically. But when the NAS OS itself fails, the RAID configuration is lost, or multiple drives go down, a standard rebuild will often make things worse.
We focus exclusively on data recovery. We do not repair NAS appliances for continued production use — that is your IT team's or the vendor's job. Our deliverable is your data on a new verified medium, ready for import into a replacement NAS or migration to cloud storage.
This separation matters because recovery workflows require operating on forensic clones, not the live drives. Any attempt to "fix" the live NAS (reset to factory, reinstall OS, force-import configuration) typically overwrites exactly the metadata we need to reconstruct the data.
Do not rebuild a failed NAS array
The most common cause of NAS data loss is a failed rebuild. When one drive fails in RAID 5, the array enters degraded mode and the NAS offers to rebuild after you replace the failed drive. But during rebuild the array is extremely vulnerable — if another drive fails (not unusual, since drives in the same array often have similar age and wear), the entire array is lost.
Another risk is swapping drive order when removing and reinserting drives into the NAS. Each drive position is critical for parity reconstruction — mixing up slots can make the RAID appear broken even when all drives are individually healthy. Always label drives before removal, photograph the slot configuration, and contact us before attempting any recovery operation.
Why choose DataHelp for NAS recovery?
Every NAS vendor uses a different combination of RAID implementation, file system, and proprietary metadata. Synology SHR (Hybrid RAID), Drobo BeyondRAID, QNAP's thin-provisioned RAID, and Netgear's X-RAID all require vendor-specific reconstruction tooling — generic recovery software cannot handle them.
We have successfully recovered data from hundreds of NAS appliances: from 2-bay home devices up to 24-bay enterprise rackmount units. Our specialists have direct experience with Synology DSM, QNAP QTS, ASUSTOR ADM, Netgear OS, and all common open-source NAS distributions (OpenMediaVault, TrueNAS Core/Scale, Unraid). For disk-level failures within the NAS we additionally operate PC-3000 tools and our 10,000+ donor drive inventory.
For business customers we offer NDA signing, priority service, and coordinated delivery to minimise downtime. Our team has over 35 years of combined industry experience and handles NAS recovery cases across all European countries.
Frequently asked questions — NAS recovery
Diagnostics are always free. NAS recovery prices depend on the array configuration and number of drives. Software failures start from €259. RAID 0/1 reconstruction from €329. RAID 5/10 from €459. RAID 6 / ZFS / complex configurations: individual quote. Individual drive failures are billed separately per drive if hardware-level recovery is needed.
Diagnostics 1–2 days. Standard recovery 1–3 weeks depending on array size. Express processing available for business continuity — we prioritise your case and can return recovered data within 48–72 hours for an additional fee.
Usually only the drives are needed. If you are unsure about the configuration or the NAS OS is damaged, we recommend shipping the entire NAS so we can extract the configuration directly from the device. For proprietary encrypted NAS (e.g. Synology with encryption) the full device plus encryption password is required.
Yes, provided we have access to the underlying RAID and file system. Modern ransomware variants encrypt data in-place, so file-level recovery is usually impossible — but in many cases we can recover from shadow copies, previous snapshots, or ZFS/Btrfs snapshots that ransomware failed to clear. We do not pay ransoms and advise against doing so.
Related guides
Useful reading before or after data recovery
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