The fault · drive not showing up
A drive your computer won't list is rarely a drive that has lost its contents. Where in the chain it vanishes — BIOS, Disk Management, Explorer — tells us which part failed, and the usual culprits are boards and firmware, not the platters or NAND your files actually sit on, so post it from Exeter as it is, unopened.
Talk it over with an engineer
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| The error | What it usually means | Step one |
|---|---|---|
| Disk Management reports Unknown, Not Initialized | Windows finds the device yet can't read a signature or partition table off it | Don't initialise it |
| You must initialize a disk before Logical Disk Manager can access it | An invitation to write a fresh signature across your data | Refuse, then power off |
| No Media showing in Disk Management | You're hearing from the controller alone — the storage behind it is silent. Usually hardware | Give up on replugging |
| The BIOS lists nothing at all | Firmware or electronics: a failed PCB, a sacrificed diode, damaged service modules | One for the electronics bench |
| BIOS shows the wrong size — 1TB appearing as 8MB | The translator or firmware is corrupt; the drive has forgotten its own capacity | A firmware job — software can't reach it |
| Silent: no spin, no light, nothing | A dead board — very often a surge-blown TVS diode | Very good odds |
Your device is logged under its own case number the day it arrives. An engineer finds the fault, tells you plainly what stands a real chance of coming back, and writes you one fixed quote. Nothing is charged for that look, nothing obliges you, and paid work starts only when you say so.
A few minutes checking BIOS, then Disk Management, then Explorer separates the possibilities — board repair, firmware corruption, or a logical fault — before anything is opened or powered.
Blown diodes are replaced and dead PCBs swapped for donors — with your drive's own ROM chip carried over, because those calibration values are what let a board drive your particular platters.
The moment the drive answers again, it gets imaged end to end. All rebuild work happens on that image; the original retires as soon as the copy is done.
Before any fee falls due you see a full listing of everything recovered and approve it. Your files travel back on brand-new media, return postage on us, and the case stays open until you've confirmed everything opens on your own machine.
Worth holding onto: of the undetected drives that reach this bench, the majority have failed in the electronics or the firmware — the machinery around the data, not the data itself. 'It's not showing up' and 'it's all gone' are two very different sentences.
A power cut overnight left it dead by morning: no spin, invisible to BIOS. The culprit was a scorched PCB with a blown TVS diode. We moved the ROM onto a donor board and had a complete image the very day the job was opened.
Yes, often. Dead electronics are replaceable, while the platters or memory chips behind them tend to be untouched. Drives that won't power up produce some of the strongest results we see.
Don't. Initialising writes a fresh signature over the exact structures that record where your files live. Decline, power down, and get it examined.
Almost never by itself. If the BIOS can't see the drive, the drive can't speak — that points at the board or firmware, not wiped data.
Unlikely. What a surge usually kills is the protection diode on the PCB — a part designed to die so the rest doesn't. You lose the board, and the data almost always survives.
Each power-up of a failing device takes more data with it. Open a case first — the look-over is free whichever way it goes.