Data Recovery Case File · Portable Drives · An Accidental Mercy
The Thing That Stopped Him Was the Best Outcome Available
His enquiry describes an attempt that was halted by an obstacle. A portable drive that "would connect but the head assembly can be heard clicking and trying to reset. I suspect a knock has knocked it out of alignment. I tried to remove the hard drive case but one of the screws is rounded and I can't get it removed." He was two screws from a much worse position — because on a drive that is clicking, opening the enclosure was never the useful step and it is the one that leads to opening other things.
| Media | 1TB portable external hard drive following suspected impact — head positioning failure audible; enclosure partially disassembled with a fastener damaged |
| Reported situation | Drive connecting on power · repeated head positioning sounds audible · impact suspected by the owner · enclosure disassembly attempted · one fastener rounded and not removable · disassembly abandoned · contents required |
| Fault class | Head positioning failure following impact — enclosure access irrelevant to the fault; assembly not opened |
| Equipment used | No further power-up once repeated positioning sounds were confirmed · damaged fastener extracted without stressing the enclosure · laminar flow bench inspection of heads, actuator and surfaces before any spin attempt · matched donor parts as indicated · imaging in one supervised session |
The decode: why opening the case would not have helped
What removing a portable drive from its enclosure achieves: it eliminates the bridge board, so a drive that is not presenting because of a failed interface can be reached directly. That is the single most useful first step in this archive — for drives that are silent.
Why it does nothing here: his drive connects. It is being seen, it is powered, and it is audibly attempting to position its heads. The interface is working perfectly, which is exactly what the bridge board is responsible for — so removing it eliminates something that is not the problem.
What the clicking actually is: the head assembly moving to a position, failing to find what it expects, returning to its park position, and trying again. Each cycle is head movement across the platter surfaces, and on a drive that has been knocked, those surfaces may already be damaged.
Why his diagnosis is broadly right: an impact can displace the head assembly or damage the heads themselves, and either produces exactly this. He has read the symptom correctly — the term he used for the head assembly is not the technical one, but the mechanism he described is.
Why the rounded screw was fortunate: because disassembly rarely stops at the enclosure. Somebody who has opened the case, found a drive that still clicks, and read that the heads may be misaligned is a short step from opening the drive itself — and that is the step that admits room air to a sealed assembly and converts a routine head replacement into a contaminated one.
What must not happen now: no further connection. Every power-up runs the same failed positioning cycle, several times a minute, dragging heads across surfaces that may already be marked.
What the rounded fastener means practically: nothing at all. Damaged screws are extracted routinely, and it is not a complication worth worrying about — the enclosure is a shell.
What is worth reporting instead: the circumstances of the knock. Whether the drive was powered and spinning at the time is the single variable that most affects what was damaged, and it costs nothing to remember.
On the bench
No further power-up was attempted once repeated positioning sounds were confirmed, each cycle moving heads across surfaces that impact may already have marked. The damaged fastener was extracted without stressing the enclosure, a rounded screw being routine and the enclosure being a shell. Inspection ran under the laminar flow bench with heads, actuator and surfaces examined before any spin attempt — removal from the enclosure eliminating the bridge board, which was demonstrably working since the drive connected.
The outcome
The fastener extracted without difficulty, the mechanism inspected before any rotation and imaged in one supervised session. Free assessment, one fixed written figure including VAT, 50% of parts and labour upfront with the balance only on successful recovery. The decode: opening the case would not have helped. Removing a drive from its enclosure eliminates the bridge board — and yours is working, because the drive connects. The clicking is the head assembly failing to position, and the screw stopped you one step short of a worse idea.
Halfway through opening a drive that clicks
Stop there, and don't worry about the screw — damaged fasteners are extracted routinely and the enclosure is only a shell. More importantly, opening it wouldn't have helped. Taking a drive out of its case eliminates the bridge board, which is the most useful first step there is for a drive that's silent and not presenting. Yours connects, so that board is working and isn't the problem. The clicking is the head assembly moving, failing to find what it expects, parking and retrying — several times a minute for as long as it's powered, across surfaces an impact may already have marked. Leave it disconnected and don't open the drive itself.
Leave it — call Oxford Data Recovery on 01865 593000; fastener extracted without stressing the enclosure, heads and surfaces inspected before any spin attempt, imaged in one supervised session.
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Our case files are drawn from genuine enquiries received by our laboratory over the past ten years, anonymised to protect client confidentiality. Each one describes the diagnostic and recovery procedure our engineers apply to that fault, using the equipment listed.