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Devices · NAS units

NAS unit recovery in Guildford.

Crashed volume, a box that refuses to start, an accidental deletion of shares, a broken rebuild: regardless of what hit your Synology, QNAP, WD or NETGEAR NAS, and irrespective of the RAID level or whether you are running SHR, Btrfs or ext4, we get the data out. All information stored on a NAS is stored on a Linux RAID array. Therefore, all we do is image each disk and rebuild that RAID array using copies; the NAS enclosure itself never needs to be operational.

From £500 · multi-bay
Most jobs — only pay if we recover your data
Synology · QNAP · +
!

Don’t let a failing NAS try to repair or rebuild itself.

Do you have a crashed or degraded volume, a disk that has dropped out, or a NAS that will not boot? Leave it exactly as it is. Do not repair it. Do not rebuild it. Do not re-sync it. Repairing, rebuilding or re-syncing a NAS puts new data onto the disks and can bury the data we are trying to recover, and dropping a disk from a NAS into a Windows PC will simply trigger a format prompt. Turn off the NAS. Note which bay each disk was in. Call us. There’s no better way to protect the data than to leave that first attempt to us.

// faults we recover from

The NAS failures we take on.

Of all the NAS recovery jobs that end up on our bench, the most common range from crashed volumes and boxes that will not start to corrupted file systems, failed rebuilds, dead hardware, and shares deleted by accident or locked by ransomware.

⊗Dead box or a NAS that won’t startIn nearly every case where a NAS will not power up, healthy disks are sitting inside a failed housing. Send us those disks and we’ll rebuild your volume without the failed housing and return your shares. A dead enclosure doesn’t change anything.HardwareDead box◌Volume crashed or failedWhen a Synology shows “Volume crashed” or a QNAP displays a volume error, this is usually because a disk dropped out or a file system became corrupted, not because your actual data has gone. Using images of the disks, we rebuild the volume and retrieve your data.VolumeCrashed▤Too many drives down for the arrayOnce the total number of failed disks exceeds what the RAID level will tolerate, the volume goes offline. We image all of these disks and then rebuild the array from the images to recover the data.Multi-diskOffline◭A rebuild or repair that stalledYou swap a disk and the rebuild or repair either fails or stops entirely. It’s the number one way NAS volumes are lost, so we stop the process there, image the full set and rebuild from safe copies.RebuildHigh risk⊟Reset, deletion or reconfigure by mistakeAn accidental reset of the box, deletion of a share or mistaken rebuild of the volume? If little new data has been written to the affected disks since, we can usually restore the original volume and recover your data.LogicalReset▦Firmware, DSM or QTS update gone wrongAn update (firmware, DSM or QTS) that essentially bricked the unit or caused the volume to drop offline? The disks themselves still contain your data, so we read them without the box, recreate the volume and give you back your shares.FirmwareUpdate◈NAS ransomware (QLocker, DeadBolt)Ransomware loves NAS systems, particularly the QLocker and DeadBolt families. If older or unencrypted copies are still around, we can frequently recover them; however, dealing with the encryption itself requires care, so please call us first.LogicalRansomware◎SHR or Btrfs file-system damageA dropped power feed, or a disk that is failing, can corrupt a Synology SHR, ext4 or Btrfs volume. In such cases, we rebuild the RAID array, repair the corrupted file system on top and restore access to your files, including any snapshots.File systemSHR⊘Disks back in the wrong baysDrives removed and put back in the wrong order, or taken out while the NAS was faulting? We identify which drive goes in what position and then rebuild the volume using the correct layout.OrderMembers
// NAS units we take on

Any NAS. Any volume.

Regardless of whether your NAS unit is branded Buffalo, NETGEAR, WD, QNAP, Synology or anything else, and whatever RAID level, SHR, ext4 or Btrfs it uses underneath, our goal remains the same: recovering the array spread across the disks themselves, not the case they live in.

SynologyQNAPWD My CloudNETGEARBuffaloAsustorTerraMasterDroboThecusSeagateLaCieZyxelSHRBtrfsext4RAID 1RAID 5RAID 6RAID 10JBODDSMQTSmdadmLVM

Drobo, TerraMaster and Asustor units; Buffalo TeraStation; NETGEAR ReadyNAS; WD My Cloud; QNAP running QTS; and Synology with DSM, SHR and Btrfs · SHR alongside RAID 10, 6, 5, 1 and 0 · Btrfs and ext4 · two- and four-bay boxes through eight-bay and rack units, expansion shelves too.

// how the recovery runs

How the recovery runs.

Post your NAS or drop it off for a no-charge diagnosis, letting us know the make, number of bays and RAID type used, and an engineer will assess it and put the exact figure in writing prior to any work being performed.

01

Free diagnostic

Tell us about your NAS (manufacturer, number of bays, RAID type and what happened) and one of our engineers will look it over and write up a quote, normally within 48 hours.

02

Image every disk

Every disk, whether healthy or failing, gets a read-only image on dedicated imaging hardware, so each subsequent step is done using a copy and your original disks are never touched.

03

Repair failed disks

If a disk has failed due to its heads, motor or circuit board, it goes onto our bench, where only the minimum work required to create an image of the disk takes place, and nothing more.

04

Reassemble the volume

Using the images, we rebuild your array (be it SHR or RAID), followed by the LVM layer that sits on top of it and finally the Btrfs or ext4 file system, matching exactly the stripe order, block size and parity your box had used.

05

Recover the shares

Once the volume is rebuilt, we extract everything (snapshots, virtual machines, backups, photos, files and shared folders), recovering data even from an array that is degraded or partly overwritten.

06

Verify

No recovered share or file leaves us until we have opened it and confirmed it is intact.

07

Return your data

All recovered data ships back to you on a clean drive, or a NAS sized appropriately for the volume, ready to plug straight back into service.

// what we recover from

Any NAS. Recovered.

Once you’ve posted your NAS or dropped it off, the diagnosis comes first, followed by a quote. And in most cases you only pay if we recover your data.

Every NAS
Synology, QNAP +
Read-only
disks never altered
Off the box
volume rebuilt
48 hr
Diagnostic turnaround
From £500
Multi-bay units
25 yrs
Recovering data
// get a custom quote

Request a written quote

Tell us what happened and we’ll get back to you, usually within a working day.

Prefer to call? 01483 901310 · Mon–Fri 9am–5:30pm

// pricing

Simple, tiered pricing.

The cost of recovering your NAS follows a simple tier pricing plan, and you receive a complimentary diagnostic and a written quote before anyone touches a disk.

NAS unit recovery
£500 + VAT
The price for a two-bay mirror is £500 + VAT. When you step up to a multi-bay array (SHR, or RAID 5, 6 and 10), the price starts at £800. In most cases you only pay if we recover your data.
  • Free diagnostic and a written quote up front
  • Two-bay NAS mirror recovery from £500 + VAT
  • Multi-bay NAS — RAID 5, 6, 10, SHR — from £800 + VAT
  • Every disk imaged read-only, your originals left untouched
  • Verified data back on a fresh drive or NAS
// jobs off the bench

Recovered NAS units, real jobs.

Some examples of recent NAS jobs, including volume crashes, dead enclosures, failed rebuilds and deleted shares. All identifying information has been removed and each result was verified. See the full write-ups: a ReadyNAS volume that refused to come back, a QNAP RAID 0 with one dead disk and a Synology felled by a power cut mid-rebuild.

// CASE 2026-040recovered
Synology DS920+ · 4×4 TBSHR · BtrfsVolume crashed

Synology reading ‘Volume crashed’ after a disk dropped out.

One disk had dropped out and it left the Btrfs volume corrupted. All disks were imaged, the array rebuilt and the shares restored.

// CASE 2026-034recovered
QNAP TS-453 · 4×6 TBRAID 5Won't boot

QNAP killed by a storm, its disks intact.

The hardware was dead, but all the disks came through unscathed. From these disks alone we were able to reform the array and recover the data.

// CASE 2026-028recovered
Synology DS220+ · 2×4 TBSHR mirrorBoth disks failed

Two-bay Synology with both disks failing together.

Both disks were failing, but neither was completely dead. Each was brought back and imaged on our bench, and the pair were used to rebuild the mirror.

// CASE 2026-021recovered
QNAP TS-873 · 8×8 TBRAID 6Failed rebuild

RAID 6 QNAP that corrupted partway through its rebuild.

Due to the rebuild, part of the volume had already been overwritten. So we imaged all the disks and rebuilt the RAID 6 array around the damaged portion of the volume.

// CASE 2026-014recovered
WD My Cloud · 1×6 TBSingle diskNAS dead

WD My Cloud that died with the only copy on it.

The enclosure was dead, but the disk inside was perfectly healthy. We were able to pull the Linux volume directly off the disk and get everything back.

// CASE 2026-007recovered
Synology DS418 · 4×3 TBSHRReset by mistake

DSM reset gone wrong that wiped a Synology volume.

Very little new data had been written since. We rebuilt the original SHR array and volume and recovered the deleted shares.

// getting it to us

Two easy steps.

Send your NAS in for the complimentary diagnostic and provide the make, number of bays and RAID configuration; an engineer will review it and put your exact quote in writing prior to performing any work.

1

Send us your device

To start recovering your data, first send your NAS (or all its disks) to us. Pack the unit carefully, include your contact information and, if shipping disks only, indicate which bay each disk came from. After we have completed your complimentary diagnostic, we will confirm your exact quote in writing prior to starting any work.

How to pack it
  • Pack your NAS in its original box if you can, or use a sturdy box with firm packing material; when sending just the individual hard drives, wrap each one anti-static and clearly mark its bay position.
  • There’s no requirement to include anything else such as caddies, cables or power supplies since they’re not necessary for the recovery.
  • Include your personal contact information inside the box (your name, address, telephone number and email) on a sheet of paper or using our shipping form. Then simply close the package.
Post toGuildford Data Recovery
Building 2, Ground Floor, Guildford Business Park
Guildford GU2 8XH
⇣Shipping formPDF · print & include with your devicePDF ↓

Sending it by post? We’d recommend a tracked, insured service. Dropping it in? No problem: Monday to Friday, 9am to 5:30pm. Please package the device as described above first.

2

Need more information?

Want a scoped quote first? Fill out the form with information about your NAS, RAID type and fault, and an engineer will review it and send you a tailored quote.

An engineer reviews every enquiry personally — we usually reply within 30 minutes during the day. Prefer to call? 01483 901310.

✓

Thanks — your message is in.

We’ll be in touch shortly. If it’s urgent, call 01483 901310.

// questions

Your NAS questions, answered.

The most commonly asked questions about retrieving data from a NAS.

Usually not. On a Synology, this message generally means one of your drives has failed or the Btrfs/ext4 volume has been corrupted; it doesn’t mean your data is gone. We make an image of every drive, reconstruct your array from those copies and then recover your shared folders.

Usually, yes. No power almost always means the enclosure is dead but the disks themselves are perfectly intact. We image the disks, rebuild the array in software and recover your data from these disks without the original enclosure.

No, and it can backfire. Everything on a NAS lives on a Linux RAID array (ext4 or Btrfs), which Windows cannot read. Worse, if you connect a NAS disk to your Windows machine, it may offer to ‘initialise’ the disk, which would wipe it. Do not allow Windows to do this. Instead, send the disks to us and the array will be rebuilt correctly.

Yes. Include all of the disks in the array, ideally labelled with their bay order, including those that appear to have failed. Recovering data from the array needs the full set together, and if any disk is missing, the volume can become unrecoverable. It does not matter whether you send us the individual drives or the entire enclosure.

Our pricing uses a tiered structure: a two-bay mirror from £500 + VAT, and a multi-bay array (SHR, or RAID 5, 6 and 10) from £800 + VAT. Both include a complimentary diagnostic and a written quote prior to starting any work.

You always get a complimentary diagnostic and a written quote first. For mechanical and multi-disk work, we require a deposit against that quote, and the balance is billed only after the recovery has been completed successfully.

All of them: Drobo, TerraMaster, Asustor, Buffalo, NETGEAR, WD, QNAP, Synology and more. Because we are rebuilding the Linux-based array from the disks, we rarely see differences in what we can recover, regardless of the branding on the enclosure.

That depends on the ransomware strain. No one can undo strong, modern encryption of the QLocker or DeadBolt type without the key, and we will not pretend otherwise. What often does work, however, is going after what the malware left behind (older snapshots, anything unencrypted, files it could not reach), all of which is recovered by imaging the disks and rebuilding the array. After we have run the diagnostic, you will get a straightforward account of what can be recovered.

Often, yes. Even when a rebuild fails, most of the original data is usually still intact underneath it. So we image each disk in its pre-rebuild state and then rebuild the array around the damaged areas, recovering anything that the rebuild did not overwrite.

Generally speaking, most jobs are completed in three to seven working days, depending on the number of disks involved, the RAID level, and whether any of the disks need mechanical work.

Either post the entire unit, or pull the hard drives from the NAS and send them to us tagged with their bay order; both options are fine. Make sure the package is fully insured and sent to our Guildford address, or deliver it to us in person, Monday to Friday, 9am to 5:30pm.

Rarely. Regardless of the manufacturer, every NAS stores its data within a standard Linux RAID array, and it is this array that we rebuild. While the manufacturer may define some specifics of the implementation (SHR on Synology, QTS on QNAP), they do not determine whether recovery is possible.

// nas failed?

Volume crashed, dead box or a failed rebuild? We’ll recover it.

We charge nothing for the diagnosis, our pricing tiers start at £500, and in most cases you only pay if we recover your data. Whatever the badge, Synology, QNAP or otherwise, we bring the data back off the box. Contact us now to begin your recovery.