Data Recovery Case File · Desktop Externals & Aging Drives · A Word for Heads That Stuck
Hard Drive Stiction: A Word for Heads That Stuck
Her enquiry passed on a diagnosis she had been given and asked the obvious next question. "I have a Toshiba 1TB hard drive that has failed, and I have been told it has suffered stiction. I wondered how much it would cost for you to be able to recover the data from the hard drive with this problem?" The term is a real one and it describes something specific, but it is used loosely often enough that it is worth unpicking before any figure is discussed — because several quite different faults produce the same outward behaviour, and they are not all priced the same. This page explains what stiction actually is, what it sounds like, why every attempt to power the drive makes it worse, and how a job of this class is priced honestly — including the possibility that a free assessment finds something cheaper than she has been told.
| Media | Toshiba 1TB hard drive — failed in service; stiction reported as the diagnosis by a third party; contents required |
| Reported situation | Drive non-functional · stiction diagnosis supplied to the owner · cost enquiry made before committing · diagnosis not independently confirmed |
| Fault class | Suspected head-to-platter adhesion — confirmation required, as motor, board and service-area faults present similarly at lower cost |
| Equipment used | Free assessment: Atola Insight Forensic power-on current signature distinguishing adhesion from motor, board and firmware faults · laminar flow bench intervention where confirmed · matched donor parts as required · PC-3000 Express with Data Extractor imaging in the same session |
The decode: what stiction is, what it sounds like, and how it is priced
What the word describes: stiction is a contraction of static friction, and in a hard drive it refers to the heads becoming adhered to the platter surface. When a drive powers down properly, the heads retract clear of the data area and park. If that retraction fails — a sudden power loss, a knock, a mechanism at the end of its life — the heads are left resting directly on a platter, and the surfaces are smooth enough that they can effectively stick to it. The platter stack then cannot turn, or can only turn against resistance, and the drive cannot start. A related and less common variant involves the spindle bearing itself seizing after long disuse.
What it sounds like: characteristically, a drive that does almost nothing. Silence, or a faint buzz as the motor strains without turning, or a brief attempt that stops immediately, sometimes repeating. What it is not is a drive that spins up healthily — if the platters reach speed, the heads are not stuck.
Why powering it is the danger: this is the part that decides the outcome, and it applies whether or not the diagnosis is right. Heads resting on a stationary platter have damaged nothing. A motor repeatedly straining against them can drag them across the surface, scoring the magnetic layer permanently and, in the worst case, tearing the head assembly and scattering debris that ruins tracks beyond it. So the number of times a suspected-stiction drive has been switched on is very often the largest single factor in how much comes back — and the correct instruction is absolute: no more power, not even to check whether it has improved.
Why the diagnosis is worth confirming: and here is where she may gain. A drive that will not spin looks identical from outside whether the cause is adhered heads, a seized spindle, a failed component on the drive's own circuit board, or a firmware fault that prevents the start sequence. Of those, the board and firmware faults require no opening at all and cost considerably less. Stiction is a real and common answer, but it is also the one people reach for when a drive will not start, and it is worth having established by measurement rather than inherited. A free assessment settles it in the drive's own terms.
How it is priced if confirmed: plainly. Freeing adhered heads means opening the drive under filtered air, and the assembly is frequently damaged in the sticking or the freeing, so matched donor parts are typically required. That means a donor drive bought and consumed, skilled hours with no second attempt available, and a supervised imaging run on a serviced mechanism. The structure: free assessment, one fixed written figure including VAT, and 50% of parts and labour payable upfront with the balance due only on successful recovery.
On the bench
The diagnosis was tested rather than accepted. The Atola Insight Forensic read the drive's power-on current signature, which distinguishes the possibilities from one another without any disassembly: a board fault draws abnormally or not at all, a seized spindle draws heavily and stalls, adhered heads produce their own characteristic profile, and a firmware fault shows a mechanism that starts normally and then stops progressing. With adhesion confirmed, the drive was opened under the laminar flow bench, the heads freed and replaced with matched donor parts where they had been damaged, and imaging began immediately in the same session on the PC-3000 Express under Data Extractor — head-mapped and complete, before the serviced mechanism was asked for anything further.
The outcome
The diagnosis confirmed by measurement, the heads freed and replaced, and the drive imaged and delivered verified. 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 handed the word: stiction means the heads have adhered to the platter surface so the stack cannot turn, and it sounds like a drive doing almost nothing rather than one spinning healthily; every power-up risks dragging stuck heads across the surface, which is the one thing that turns a recoverable fault into permanent scoring; and because seized spindles, board faults and firmware problems all look identical from outside — and two of those need no opening at all — it is worth having the diagnosis confirmed free before budgeting for the expensive road.
Told your drive has stiction
Stop switching it on, immediately and permanently. Heads stuck to a stationary platter have damaged nothing; a motor straining against them repeatedly can drag them across the surface and score it beyond recovery, so every attempt to see whether it has freed itself is spending your data. Don't tap it, don't freeze it, and don't try turning it over or rotating it by hand — none of the folk remedies free adhered heads and all of them risk the surfaces. Then have the diagnosis confirmed before you budget: a drive that won't spin looks the same from outside whether the cause is stuck heads, a seized bearing, a failed board component or a firmware fault, and the last two need no opening and cost substantially less. A proper assessment distinguishes them from the drive's power-on behaviour without any disassembly, and should cost you nothing.
Have it confirmed free first — call Leeds Data Recovery on 0113 322 3083; power-on behaviour measured, heads freed under the laminar flow bench if that is the answer, imaged the same 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.