Data Recovery Case File · Second Fixes & Trade Handoffs · A Click Is Not a Filesystem
When the Advice Contradicts the Symptom
Her enquiry reported both a recommendation and the observation that disproves it. A 6TB desktop drive tested "on 4 different computers, PC and Mac. Our IT had a look and said that it needs formatting. It powers up for 1 second and then makes a click sound and doesn't mount. This has important info on it." Those two sentences cannot both be acted upon, and the second one is the reliable half. Formatting operates on a filesystem, and a clicking drive never gets far enough to have one addressed — so the advice is not merely risky here, it describes an operation that could not run. That mismatch is worth understanding, because it tells you something about how the advice was arrived at.
| Media | 6TB desktop external hard drive — brief spin-up followed by an audible click; not mounting on four separate machines across two operating systems; business-critical content |
| Reported situation | Drive powering for approximately one second before clicking · not mounting on four computers across PC and Mac · internal IT recommending a format · important business content held |
| Fault class | Head positioning failure following spin-up — mechanical intervention required; no filesystem-level operation possible or relevant |
| Equipment used | No further power-up · laminar flow bench inspection of heads and surfaces before power · matched donor head service · PC-3000 Express with Data Extractor prioritised head-mapped imaging |
The decode: why the two statements are incompatible
What has to happen before a format is even possible: a drive must power up, spin to speed, calibrate its heads, read the reserved region holding its own firmware, report a usable capacity, and present itself as addressable storage. Only then can any filesystem operation — formatting included — take place, because formatting means writing new structures to a drive that is answering. A drive that clicks has failed partway through that sequence, so there is nothing for a format to be applied to. The command would not fail because it was a bad idea; it would fail because there is no target.
What the click actually means: her description is unusually precise and it locates the failure exactly. One second of power-up means the drive did spin, so the motor, bearings and electronics all work. The click that follows is the head assembly attempting to position itself against the servo patterns on the platters, failing, returning to its stop, and trying again. So rotation succeeded and calibration did not — a mechanical fault at the heads, which is well below anything a computer or an operating system can address.
What the mismatch tells you about the advice: not that the IT team is incompetent, but that the recommendation was almost certainly formed from what the computer showed rather than from what the drive was doing. A machine presented with a drive it cannot mount will often suggest formatting, and passing that on is a reasonable thing to do if the click was not heard. It is a useful general lesson: when advice about a storage device conflicts with a physical symptom, the physical symptom wins, because the noise is coming from the mechanism and the advice is coming from software that cannot see it.
Why four computers is worth something: testing across four machines and two operating systems is a complete elimination of hosts, drivers and configuration. It also means the drive has now been powered at least four times since it started clicking, which is the cost of that thoroughness — each attempt moves a damaged head assembly across the surfaces.
What should happen now: stop connecting it, and do not attempt the format. The drive is opened under filtered air and inspected before anything is powered, because the condition of the heads and surfaces determines the plan rather than following it.
On the bench
The drive was not powered again and no filesystem operation was attempted, since a drive that fails during head calibration never presents storage for one to act on. It was opened under the laminar flow bench and the head assembly and platter surfaces inspected before anything was switched on, with any scoring located and measured — including damage from the four power-ups already made. Matched donor heads were fitted, and imaging ran on the PC-3000 Express under Data Extractor, head-mapped and prioritised in one supervised session, with unreadable regions resolved to the files they affected.
The outcome
The mechanism inspected before power, serviced and imaged in one supervised session with losses named per file. Free assessment, one fixed written figure including VAT, 50% of parts and labour upfront with the balance only on successful recovery. The decode, for anyone given advice that does not match the symptom: formatting operates on a drive that is answering, and a clicking drive never completes the sequence that makes it addressable — so the two statements are incompatible and the physical symptom is the reliable one; a second of power-up followed by a click means rotation succeeded and head calibration failed, which is mechanical and well below anything software can reach. When advice about storage conflicts with a noise, the noise wins.
Told to format a drive that makes a noise
Don't — and notice that the advice and the symptom can't both be right. Formatting means writing new structures to a drive that is answering, and a drive has to power up, spin to speed, calibrate its heads, read its own firmware region and report a usable capacity before any of that is possible. One that clicks has failed partway through, so there's nothing for a format to act on. Your description locates it precisely, too: a second of power-up means the motor and electronics work, and the click that follows is the head assembly failing to position itself. That's mechanical, and no software operation reaches it. The advice was probably formed from what a computer displayed rather than from hearing the drive, which is understandable. As a general rule: when advice about storage conflicts with a physical noise, the noise wins.
The noise wins — call Newcastle Data Recovery on 0191 406 1051; inspected before power, heads replaced with matched donor parts, imaged in one supervised session with losses named per file.
Request a quote online →
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.