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RDR / By symptom / Dropped, or knocked over

The fault · a drop or a knock

Dropped hard drive recovery, Reading. The fall took a second; what it left behind does not.

Leave it unplugged. Whether the disk was spinning at the moment it fell will decide almost everything that happens next. Switched off, a hard drive survives a fall better than most people think: the heads are parked safely out of the way and the case helps absorb the shock. Spinning, there's no room for error at all: platters at 5,400 or 7,200rpm, the head floating nanometres above them with nowhere else to go. So resist the urge to plug the drive in and check it. After a drop, the very first spin-up can be the last clean pass it has left, and a test spends it. Diagnosis costs nothing, a single drive is £300 + VAT, and the figure is in writing before any work starts.

Only pay if we recover your data, on most jobs The diagnosis is free; then one fixed figure in writing Parcels arrive from Newbury, Woodley and Theale

An engineer answers, and looking is free
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Match the symptom to the fault.

Different fault? Begin at the triage →
What you noticeWhat is likely wrongWhat happens next
Clicking ever since it went overThe impact knocked the heads out of alignment, and it keeps trying to find its place againDo not switch it on
One beep after the knockNothing is rotating: the heads are flat down on the platter, or a bearing has failedShaking it achieves nothing
The computer no longer detects itHeads down on the surface, a spindle motor that has stopped, or damage to the board or socketHave it looked at rather than retried
All right at first, worse sinceMinor damage that will get worse with each hour it keeps runningMove while it still answers
An SSD or a USB stick that stopped working when it was droppedNothing inside these moves, so the cause is likely a damaged circuit board, joint or connectorRepair work at board level
Packing and posting: first get a quote, by phone or with our quote form. Next, pack it so nothing can move inside during transit, and put a value on the parcel based on what the files mean to you. Send it tracked and insured to the Oxford intake lab. Alternatively, if you prefer to hand it in, you can drop it off at the Oxford intake lab Monday to Friday, 9am to 5:30pm; no appointment needed. We cover the cost of the return delivery. If you want an engineer to talk you through the packing before you close the box, call us first. All the details are on the packing and postage page.

What those G ratings mean for a dropped drive.

Parked, or spinningManufacturers broadly agree on how much force this takes: a notebook unit will withstand around 350 to 400G while in operation, and 2.5 to 3 times that (approximately 1,000G) once parked. The fall is the same for both. What changes is how much shock the mechanism can absorb.
When a head settles on the surfaceKnock a drive while the platters are spinning and the heads come down onto them and bounce. Each touch is another opportunity to scratch the magnetic coating, and that coating is where your data physically resides.
The desktop drive is the fragile oneDesktop 3.5" mechanisms are typically quoted at about ~30G while operating. That's no more than a firm thump on the desk they sit on. People call insisting they hardly touched the machine; with a tower sitting under a desk, that is usually true.
Dropped sticks and SSDsThere are no moving parts in a WD My Passport SSD or a normal USB stick, so a drop big enough to finish a hard disk will usually leave both working. If one has failed, look first to the solder: a cracked joint, a connector pulled off the circuit board, or a damaged PCB. All three are fixable.

From your parcel to your files coming back.

Jobs we have closed →
01

Logged the day it lands, and the look costs nothing Free

A case number is assigned to your device when we receive it. An engineer then finds the real fault (free) before anything else occurs; you will be advised clearly of what will be returned and what will not, along with a single written price. Charges cannot begin until you have read this and accepted.

The look costs you nothingA fixed price, in writingStill nothing to pay
02

Nothing gets switched on

The engineer checks the drive by hand first; only once that's done does anything get powered up. A head knocked out of alignment can end up down on the surface within the first revolution of the first spin-up. A drive that does need to be turned gets one rotation, and that is watched.

Looked at before powerTurned once, under watch
03

Setting the mechanism right

The damaged head stack is removed and a donor head stack matched to your drive replaces it. If the spindle has seized it is freed, any head stuck to a platter is carefully lifted clear, and damaged boards and sockets are repaired.

Donors matched by model and batchRepairs to board and socket
04

Clean areas first, damaged ones after

Everything that reads cleanly comes off the disk first and is placed somewhere safe. Only after that are any attempts made on the sectors ruined by the impact.

Sound areas taken firstDamaged sectors attempted after
05

The list first, then the bill, then the files

You look at the file list first and make a decision about what to do. We will never invoice anything until you have said yes, and in most cases you only pay if we recover your data. All of the information that we recover will be put on new media purchased by us specifically for this job, and our company pays the cost of postage back to you. The case stays open on the bench until you tell us the files open on your own machine.

Nothing billed until you say yesNew media, bought for the jobPostage home is on us

What goes wrong most often

  • Whether the drive was running or parked decides it: shock ratings hundreds of G apart, printed on one datasheet for one drive.
  • Every attempt costs something: power it on again after a fall and damaged heads take another sweep across the surface. This is why the first spin-up is better left to a bench than a desk.
  • Quiet does not mean healthy: a head knocked off true will often behave itself for a fortnight before quitting for good.
  • Travel was designed into a 2.5", and out of a 3.5": one was built for a rucksack, a bus and a crowded train. The other was built for a desk it never leaves.

What the datasheets show: 2.5" notebook mechanisms are usually rated at around ~350–400G while running and ~1,000G once parked, while certain 3.5" desktop units, with the platters turning, are quoted as low as ~30G. It costs you nothing to shut your computer down before you move it, and no other advice on this page is worth as much.

How one of these actually went.

RG · RDG-2026-1797ON FILE ✓

Three years of weddings, and a fall onto concrete

It went over while the bags were being packed down, and the clicking began before it even reached the bench. That drive held three years of paid work, the morning's ceremony included. A matched donor stack was fitted, two days went on the copy, and every gallery came back.

99%was recovered4 days from arrival to return

What helps, and what makes it worse.

First things to do

  • Odd sound? Cut power at once
  • Set it flat on a firm surface
  • From a laptop or PC, send the hard drive alone; an external is sent whole with its cable and power supply. Add any parts that came off
  • Tell us if it had power when it went over

What makes it worse

  • One more try, just to see
  • Shaking it to listen for the rattle
  • Running recovery software over a broken mechanism
  • Assuming a silent drive is unharmed

Answers before you commit to anything.

Can a dropped drive still be read?

Usually, as long as nobody else has had a go at it first. We are not attempting to restore the drive to working order; it needs to survive one slow read and no longer. A donor head stack of the same model and batch is fitted, the imaging is done gently, and generally most of the surface comes off.

It was plugged in when it went over. How much does that matter?

More than any other point on this page. Powered down, the same fall is substantially less damaging. A head travelling nanometres above a spinning platter has no room for error, and it may score the coating on the way. So leave it unplugged.

Can a dropped SSD be damaged?

Not often. With no motion inside the drive, the damage is generally confined to the board: a broken connector, a solder joint that splits. That is bench electronics, and it is most likely repairable. Your files are stored on flash memory chips, and those usually survive the fall unscathed.

It ran for a week, then stopped. Was that the fall?

Almost certainly. Knock a head or bearing just slightly from its true position and each spin-up after that moves it a little further. The fall decided the outcome; each start since has brought it nearer.

Nothing gets worse while it sits switched off.

There is no charge for the look. You then receive a list of the files that opened, those that did not, and a fixed amount to complete the job. Keep it switched off until you have received that in writing.

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