Data Recovery Case File · Second Fixes & Trade Handoffs · Ask How They Established It
A Disproved Theory Is Progress, and the Method Is the Question
His enquiry is made on behalf of somebody else and reports an elimination rather than a diagnosis. His daughter's drive failed, and "she took it to a local computer firm who said the arm had probably stuck. This wasn't the case and they were unable to help further." He is asking about cost because she is not working. Ruling something out is real work and worth having — but what matters far more than their conclusion is how they arrived at it.
| Media | 1.5TB hard drive assessed by a general computer firm — head adhesion hypothesised and subsequently excluded; no recovery achieved; method of exclusion not stated |
| Reported situation | Drive failed and assessed by a local computer firm · head adhesion proposed as the likely cause · that cause subsequently excluded by the firm · firm unable to proceed further · enquiry made on behalf of the owner · cost a material consideration |
| Fault class | Undetermined with one hypothesis excluded — method of exclusion determinative of handling; contamination to be assumed if the assembly was opened |
| Equipment used | Method of exclusion established before any handling decision · assembly examined for evidence of opening · drive handled as contaminated where opening was indicated · laminar flow bench inspection before any spin attempt · scope narrowed to identified material before any figure was given |
The decode: the question behind the finding
Why their hypothesis was reasonable: heads adhering to a platter is among the commonest reasons a drive stops working, and it produces a recognisable signature — a motor straining audibly against a stack that will not turn. Proposing it was sound, and a firm that forms a specific hypothesis is doing better than one that says the drive has failed.
Why the exclusion is worth having: knowing what a drive is not doing narrows the field. If the heads are not stuck, the drive can turn — which eliminates the whole family of faults where a mechanism cannot start, and points at electronics, at the drive's own start-up, or at read failures on a spinning drive.
Now the question that matters more than any of that: how did they establish it? There are three ways and they are not equivalent. Acoustically, by listening to whether the motor labours or settles — which costs nothing and risks nothing. By connecting it and observing whether it spins — a single controlled attempt, also low-risk. Or by opening the assembly and looking, which answers the question definitively and admits ambient air to a sealed environment.
Why the third possibility changes everything: a drive's heads fly above the platter at a height smaller than a smoke particle, which is why the assembly is sealed. Opening it in room air admits dust and fibres that will be struck the moment the drive turns. A drive known to have been opened is handled as contaminated from the outset — inspected for particulate before any rotation, and never casually spun.
Why asking is not an accusation: a general computer firm opening a drive to look is a completely understandable thing to do, and many would not know the significance. The point is to find out, because a drive discovered to have been opened after decisions were made on wrong assumptions is worse for everybody.
On the cost question, directly: assessment is free and produces a fixed written figure before anything is committed. And the figure can be reduced by scope — a recovery aimed at specific named material is quicker to confirm than reconstructing an entire drive. Establishing what she actually needs, rather than everything, is the single most useful thing available before any decision about affordability.
On the bench
The method of exclusion was established before any handling decision — head adhesion being excludable acoustically, by a single controlled connection, or by opening the assembly, which are equivalent in conclusion and entirely different in consequence. The assembly was examined for evidence of opening and the drive handled as contaminated where opening was indicated. Inspection ran under the laminar flow bench before any spin attempt, and scope was narrowed to identified material before any figure was given.
The outcome
The method of exclusion established first, the assembly examined for evidence of opening and scope narrowed before any figure. Free assessment, one fixed written figure including VAT, 50% of parts and labour upfront with the balance only on successful recovery. The decode: their hypothesis was sound and excluding it is real progress — a drive whose heads are not stuck can turn, which rules out a whole family of faults. What matters more is how they established it: acoustically and by connection cost nothing, while opening the assembly admits ambient air and changes all subsequent handling.
Enquiring on behalf of someone, with cost in mind
Ask the firm that looked at it how they ruled out their theory — that matters more than the theory itself. Head adhesion can be excluded by listening to whether the motor labours or settles, by a single controlled connection, or by opening the assembly and looking. The conclusions are equivalent and the consequences aren't: a drive's heads fly above the platter at a height smaller than a smoke particle, so opening it in room air admits dust that will be struck the moment it turns, and a drive known to have been opened must be handled as contaminated from the start. It isn't an accusation, it's information. On cost, find out which specific files are actually needed.
Ask how they established it — then call Guildford Data Recovery on 01483 901310; method of exclusion established before handling, assembly examined for evidence of opening, scope narrowed before any figure is given.
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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.