Electrical damage · casebook entry · MKD-2025-4618
It Dropped Mid-Copy and Ripped the USB Out.
A Buckingham journalist was moving two years of interviews off an old laptop when the cable caught a chair arm. The Canvio went off the desk while it was copying
and the plug tore out on the way down
. Since then it grinds briefly and then stops
, and no computer sees it
. She worried about the timing, and she was right to.
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Without the jargon.
One drop, two possible bills. With the power off, the heads sit parked on a ramp away from the platters, and a fall from desk height is often survived without comment. During a write, none of that protection applies: the heads are flying a fraction above the surface, the arm is in motion, and the impact is over long before anything can retract them. This drive got the expensive version.
The kit this job needed.
See how a job runs here →| Kit | Why it was used | What it gives us |
|---|---|---|
| DeepSpar Disk Imager 4 | Scored each head before any reading; the scores decided the sequence | Maps the heads, then images each — resets, timeouts and power cycles controlled |
| PC-3000 Data Extractor | Drove the read passes, clearing every freeze with a controlled power cycle | The PC-3000 imager, driven from the firmware side of the tool |
| R-Studio Technician | Reassembled the volume off the copy, including the folder cut short | Copes with almost any file system; dependable array rebuilds |
What happened on the bench.
Study what the impact wrote before touching anything
Opened under laminar flow, the stack showed the patchy damage that flying impacts leave: two sliders knocked about, the others hardly marked. A narrow band of light contact scuffing ran where the arm had been forced down onto the platter — genuine harm, but shallow, and a long way from the circular gouging that ends a case.
New stack, a survey, then reading in sequence
Donor heads for the right model went in and the surfaces were surveyed. That decided the plan on its own: the sound areas came off fast while the drive was fresh, and the scuffed band was held back until the end, to be taken slowly with resets on standby.
Treat the scuffed band as the casualty it is
The strip that had been under the heads at the moment of impact was read last, at a crawl, with retries set generously. Most of it came off. The drive was never once mounted to see what would happen — every sector was requested once, gently, through the imager.
The outcome.
Almost the entire archive came through. The cost was a handful of interviews inside the scuffed band, listed by name in the report. The folder that was mid-copy when the drive fell got there in the end — off the image, with the drive switched off.
Other jobs from the casebook.
More Electrical damage cases.
Does that sound like your device?
One lesson runs through the lot: cut the power, let us look for free, then decide with the facts in hand.