Data Recovery Case File · Second Fixes & Trade Handoffs · Do Not Power It Again
A Head Resting on the Surface Is the One Fault Powering Up Makes Worse
Her enquiry asks a direct question and deserves a direct answer. A drive holding all of her teaching work which the computer cannot find, where "our technician thinks that the drive read head has become stuck — what does this mean and is it fixable?" It means the heads are resting where they should not be, and it is the one diagnosis where the ordinary response of trying again is precisely the thing that turns a recoverable fault into an unrecoverable one.
| Media | Hard drive holding professional working material — not detected on connection; head adhesion or failed load indicated by a prior on-site opinion |
| Reported situation | Drive holding accumulated teaching material · drive not located when connected · on-site technician indicating a stuck read head · owner seeking an explanation of the diagnosis and its prospects · no backup held · contents required |
| Fault class | Head adhesion or failed head load — heads resting on or unable to leave the surface; rotation attempts against a stuck head causing surface damage |
| Equipment used | Suggested diagnosis treated as plausible and confirmed independently before any power-up · laminar flow bench inspection with head and surface assessment before any spin attempt · heads freed or replaced with a matched donor assembly under filtered air · single controlled read pass following intervention · imaging in one supervised session |
The decode: what a stuck head is, and why it is urgent
Where the heads are supposed to be: a drive's heads fly above the platters on a cushion of air generated by rotation, never touching the surface while running. When the drive stops, they are moved clear — either to a ramp at the edge or to a designated landing area — so that nothing rests on the recorded surface.
What "stuck" describes: heads that are in contact with the platter and will not leave it. Smooth surfaces in close contact can adhere, and heads that came to rest on the platter — after an uncontrolled stop, or a failure to park correctly — can bond to it. The alternative version is a head that fails to load off its ramp at all.
Why the drive is not detected: a drive cannot report itself until the mechanism reaches speed and the heads read its internal configuration. A motor that cannot turn against a stuck head, or heads that never load, means none of that happens — so the computer sees nothing.
Why this is the diagnosis where powering up does the damage: the motor is strong and it will attempt to rotate. If the heads are adhered to the surface, that attempt drags them across the recording — and the surface is where the data physically is. A fault that was mechanical and recoverable becomes surface damage that is not.
Why that makes the ordinary response the harmful one: the instinct on a drive that is not detected is to try it again, on another cable, on another machine. Every one of those attempts is another rotation attempt against a stuck head, and this is the fault where trying again has a real and irreversible cost.
Whether it is fixable, honestly: frequently yes, and the prospects depend heavily on how many times it has been powered since. The heads are freed or replaced under filtered air, and the drive is read once, carefully — a drive brought in early is a considerably better prospect than one that has been tested repeatedly.
Why it is opened rather than treated externally: the intervention is physical and takes place inside the sealed assembly. The drive is opened under filtered air, the heads addressed, and a matched donor assembly fitted where they cannot be reused — which is why this work is priced with part of the cost upfront and the balance only on success.
Why her technician deserves credit: naming a stuck head rather than declaring the drive dead is a specific and plausible reading of a drive that will not detect and will not spin. It also produced the right outcome, which was to stop and ask rather than to keep testing.
What must not happen now: no further connection, no trying it on another machine, and no leaving it powered to see whether it starts. The single most useful thing is that it stays switched off.
On the bench
The suggested diagnosis was treated as plausible and confirmed independently before any power-up — heads flying above the platters on rotation and being parked clear at rest, so adhesion to the surface or a failed load from the ramp prevents the mechanism reaching speed and prevents the drive reporting itself. Rotation attempted against an adhered head drags it across the recorded surface, converting a mechanical fault into surface damage. Heads were freed or replaced with a matched donor assembly under the laminar flow bench, followed by a single controlled read pass.
The outcome
The diagnosis confirmed independently before any power-up, heads addressed under filtered air, and a single controlled read pass performed. Free assessment, one fixed written figure including VAT, with 50% of parts and labour payable upfront where the drive is opened and the balance only on a successful recovery. The decode: a stuck head means the heads are resting on the surface instead of parked clear. The motor will still try to turn — and that attempt drags them across the recording, which is why this is the one fault where trying again is the damage.
When someone tells you a head has become stuck
Stop powering the drive — this is the one diagnosis where trying again causes the damage rather than just failing. Heads normally fly above the platters on a cushion of air and are parked clear when the drive stops. Stuck means they're resting on the recorded surface and won't leave it, so the drive can't reach speed and can't report itself. But the motor is strong and will keep attempting to turn, and each attempt drags the heads across the recording — converting a mechanical fault that's often recoverable into surface damage that isn't. Prospects depend heavily on how many times it's been powered since, so the most useful thing you can do is leave it off.
Leave it switched off — call Easy Data Recovery on 028 9002 0144; diagnosis confirmed independently before any power-up, heads addressed under filtered air, single controlled read pass.
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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.