Data Recovery Case File · NAS & Network Storage · Looking Undamaged Is Not Being Undamaged
An Enclosure That Deformed Absorbed Energy That Still Reached the Drives Inside
His enquiry reports the damage he can see and the absence of damage he cannot. A two-bay network unit dropped from around a metre and a half where "the casing is buckled" and the two drives inside "appear undamaged." External appearance is the one thing a drive cannot be judged by — heads are displaced by forces that leave no mark at all, and a deformed enclosure proves the energy was substantial.
| Media | Two-bay network storage unit dropped from approximately 1.5 metres — enclosure visibly deformed; two 3.5-inch drives showing no external damage |
| Reported situation | Network storage unit falling from approximately 1.5 metres · unit casing visibly buckled · two drives contained within · drives showing no external damage on inspection by the owner · recovery of content from the drives sought |
| Fault class | Impact transmitted to drives within a deformed enclosure — external appearance not indicative of internal displacement; array topology determining whether either member is independently complete |
| Equipment used | External appearance discounted as evidence of internal condition · no power-up permitted pending inspection · array topology established from member metadata before any expectation was set · each member assessed independently on a controlled bench supply with draw measured · laminar flow bench inspection where positioning failure was indicated |
The decode: what the buckling proves, and the question about the pair
Why a deformed enclosure is significant evidence: metal does not bend for nothing. Visible deformation means the impact was substantial enough to exceed the material's limit, which is a measurement of the energy involved.
Where that energy went: through the mounting into the drives. Drives in a unit are bolted to the chassis, so a chassis that deformed transmitted the shock directly rather than absorbing it.
Why the drives can look perfect regardless: the damage is internal and microscopic. A head displaced by a fraction of a millimetre leaves no external trace whatever, and the housing is rigid enough to survive impacts the mechanism does not.
Why external inspection is therefore the least useful test: it examines the one part designed not to show it. Undamaged casing and undamaged mechanism are unrelated.
Why powering them is the dangerous test: displacement only causes harm when the platters turn. A drive with a disturbed head does its damage in the first seconds of rotation, and it will look fine until then.
What is done instead: each member is assessed independently with current draw watched, and inspected under filtered air where behaviour indicates positioning failure. Neither drive goes back into the unit.
The second question, and it decides the shape of the outcome: how the two drives were arranged. Two members can hold two complete copies, or two halves of everything, and the difference is total.
Why a mirrored pair would be the favourable case: each drive holds the entire contents. One member surviving the drop returns everything, and the other becomes unnecessary.
Why a striped pair would be the unfavourable one: every file is divided between them. Both must be readable, and a single damaged member leaves every file incomplete.
Why that is established from the drives rather than from memory: owners frequently do not know which was configured. Array metadata on the members themselves records the arrangement, and it is read before any expectation is set.
On the bench
External appearance was discounted as evidence of internal condition — visible deformation of a chassis indicating impact energy exceeding the material's limit, transmitted through the mounting to drives bolted to it, while head displacement of a fraction of a millimetre leaves no external trace. Displacement causes damage only once platters rotate. Array topology was established from member metadata before any expectation was set, mirrored members each holding complete contents and striped members each holding part of every file.
The outcome
External appearance discounted, no powering permitted pending inspection, and array topology established from member metadata. Free assessment, one fixed written figure including VAT, charged per drive, with 50% of parts and labour upfront and the balance only on successful recovery where a drive is opened. The decode: the buckling is the evidence, not the drives looking fine. Metal that deformed absorbed energy that went through the mounting into the drives — and a displaced head leaves no external mark at all.
A dropped unit whose drives look undamaged
Don't power them, and don't put them back in the unit. External inspection examines the one part designed not to show impact damage — a head displaced by a fraction of a millimetre leaves no trace, while the housing survives impacts the mechanism doesn't. The buckled casing is the real evidence: metal doesn't deform for nothing, and drives bolted to a chassis receive what the chassis transmits. Displacement only causes harm once the platters turn, so the first power-up is the moment that matters.
Don't power them — call Manchester Data Recovery on 0161 871 0788; external appearance discounted as evidence, each member assessed independently, array topology established from member metadata first.
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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.