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Two failed disks, a grinding noise, and a decade of weddings.

A photography studio's six-bay Drobo offline after two members failed at once — one of them mechanically. Head-stack work on the casualties, then the proprietary array rebuilt outside the enclosure.

DeviceDrobo 6-bay · 6×4 TB WD Red
FaultTwo disks failed · head crash
Turnaround9 days
Outcome95% recovered
ToolsClean-air bench · DeepSpar DDI

The situation

A wedding photography business lost access to its six-bay Drobo when two disks dropped out within a short period of each other. The dashboard reported the volume as unavailable, and one of the failed disks was audibly grinding — a scraping, cyclical noise rather than the sharper click of a head park. On the unit sat years of client albums, raw files and delivered edits, much of it work that could never be reshot.

First look and diagnosis

The grinding disk was never powered again after arrival. Opened under filtered clean air, it showed a failed head-stack with visible surface scoring on the affected platter — the noise had been the sliders dragging where they should have been flying. The second failed member was electrically sound but had accumulated enough unreadable sectors that the Drobo had ejected it from the pool. The remaining four disks were healthy. Drobo's BeyondRAID is not a standard RAID level, so the layout could not be assumed — it had to be derived.

The recovery

The mechanically failed disk was fitted with a matched donor head-stack and imaged in short, controlled passes, prioritising the regions the volume needed most; a scored platter will not give up everything, and pushing it simply widens the damage. The second casualty was imaged with aggressive retry limits and skipped regions logged. All six members were then imaged read-only, and the Drobo layout — block distribution, redundancy pattern and the metadata that maps blocks to the logical volume — was reconstructed from those images rather than from the appliance, which was never asked to rebuild anything.

Verifying and returning the data

Recovered images were verified by opening them, with raw files checked against their embedded previews and the folder structure matched to the studio's own catalogue so missing items could be named rather than merely counted. Files that fell within the scored region of the crashed platter were reported individually.

Outcome

About 95% of the volume returned, including the complete client albums and the overwhelming majority of raw originals. The shortfall was concentrated where the head crash had scored the platter surface — damage that predated our involvement and could not be undone. The studio delivered its outstanding client work. The wider lesson was blunt: a redundant unit is not a backup, and a NAS that has already lost one disk is running without a safety net until that disk is replaced.

Send the unit, not just the disks

For a NAS or a Drobo, either the whole unit or the disks in bay order is fine — but the bay order matters, so label them before they leave. Don't run a rebuild, don't reinsert a disk that has been ejected, and if any disk is making noise, leave it powered down. NAS and RAID recovery starts from £500 +VAT; physical drive-level work carries a 50% deposit, with the balance due only on success.

// sending your device in

Two simple steps.

Get the device to us for a free diagnostic and a quick note on what went wrong — an engineer looks it over and puts your exact quote in writing before anything is started.

1

Send us your device

The route to your data starts with the device reaching us. Box it up securely, tuck your contact details inside, and send it across — after the free diagnostic, we put your exact price in writing before a single step is taken.

How to pack it
  • Box the device up in a small, sturdy carton or a padded envelope.
  • You can leave out caddies, cables and power supplies — none of them are needed for the recovery.
  • Pop your details inside — name, address, phone and email, on a slip of paper or via our shipping form — and seal it up.
Post toOxford Data Recovery
John Eccles House, Oxford Science Park
Oxford OX2
Shipping formPDF · print & include with your devicePDF ↓

Sending it by post? Go with a tracked, insured service. Prefer to bring it round? Our door is open Monday to Friday, 9am to 5:30pm — just pack the device as described above beforehand.

2

Need more information?

Prefer to get a sense of things first? Complete the form with a bit more about the fault and an engineer will look it over and send back a tailored quote.

Every enquiry is read by an engineer in person — daytime replies usually land within 30 minutes. Rather talk? 01865 593000.

Thanks — your message is in.

We’ll get back to you soon. Anything pressing, call 01865 593000.

Common questions

Can data be recovered from a NAS that will not mount?

Usually yes. The disks are removed, imaged read-only and the array reconstructed outside the enclosure, so a failed NAS controller or power supply stops being the obstacle. Proprietary layouts such as Drobo's BeyondRAID are derived from the images rather than read from the appliance.

Should I send the whole NAS or just the drives?

Either is fine for a NAS — the unit itself or the disks in bay order. If you remove them, label each one with its bay number first, because that order matters for reconstruction. Don't run a repair or rebuild from the NAS interface before sending.

What does NAS data recovery cost?

NAS, RAID and server recovery starts from £500 plus VAT, confirmed in a written quote after a free 48-hour diagnostic. Where physical drive work is required we take a 50% deposit, with the balance due only on a successful recovery.

Related

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