Data Recovery Case File · Second Fixes & Trade Handoffs · Reading the Report

Four Passes and One Fail

This enquiry arrived with a formal evaluation report attached, which makes it unusually easy to answer well. The findings, in order: visual inspection for physical damage — pass. Liquid contamination — pass. Electronics visual inspection — pass. Power-up test — pass. Media integrity scan — fail. The conclusion given was media corruption leading to inaccessible data. The enquirer felt the quotation was "expensive considering delays". That report is a genuinely good piece of work and it deserves reading properly, because the four passes are as informative as the one failure — and together they describe a specific and largely favourable position that the word "corruption" rather flattens.

The decode: what each line eliminates, and what that means for cost

What the four passes rule out: a great deal, and all of it expensive. Visual inspection — pass means no impact damage or deformation. Liquid contamination — pass means no corrosion to clean and no residue driving progressive damage. Electronics — pass means the circuit board is intact, so no component-level repair and no adaptive-data transfer. Power-up — pass means the drive spins, reaches speed, identifies itself and reports its capacity — which eliminates seized motors, adhered heads, clicking, and firmware-area failures in one line. Between them, those four remove every category that requires opening the sealed assembly, fitting donor parts or working under filtered air.

What the one failure means: the surface scan could not read reliably across the media. That is real and it is the fault. But it describes a drive that works and cannot return all of its data, rather than one that is broken — and the remedy for that is not mechanical intervention. It is patient reading: imaging under per-sector timeouts, banking the healthy expanse first at full speed and revisiting the difficult regions on later passes, where repeated attempts frequently recover sectors that failed the first several.

Why "corruption" undersells it: the word suggests data that has become wrong. What the scan actually found is data that cannot be read on demand — a different thing, and one where the outcome depends heavily on how patiently the drive is worked rather than on how damaged the files are. A great many drives that fail an integrity scan yield most of their contents to timeout-controlled imaging.

On the price and the delay: a fair concern, and worth separating from the technical picture. A drive needing no mechanical work is at the more affordable end of this trade, and a figure should be explicable in terms of what has to be done. It is entirely reasonable to seek a second assessment — where assessments are free, it costs a postage label — and doing so is not a reflection on a report that has, in fact, been done properly. What matters is that the second firm reads the existing findings rather than repeating them: four passes established elsewhere do not need establishing again.

The one caution about delay: a drive failing an integrity scan is not stable, and each full-surface pass costs margin. So while comparing quotations is sensible, leaving the drive in limbo for a long period — or having it scanned repeatedly by successive firms — has a real cost.

On the bench

The prior findings were used as a starting position rather than repeated, since four passes established elsewhere do not need establishing again and every additional full-surface scan costs margin on a drive that is already failing reads. The Atola Insight Forensic assessed error rates to establish how widespread the degradation was, and imaging ran on the PC-3000 Express under Data Extractor with per-sector timeouts — healthy ground banked at speed, weak regions deferred to later patient passes. Every unreadable region was resolved to the individual files it affected.

The outcome

The existing findings built upon rather than repeated, the drive imaged under timeout control and the losses reported per file. Free assessment, one fixed written figure including VAT; where a drive has to be opened, 50% of parts and labour is payable upfront with the balance only on success — otherwise no recovery, no fee. The decode, for anyone holding an evaluation report: read the passes as carefully as the failure — clear visual, liquid, electronics and power-up checks eliminate impact, corrosion, board faults, seized motors and firmware problems, which is every category requiring the sealed assembly to be opened; a failed surface scan means the drive works and cannot return all its data, and the remedy is patient timeout-controlled reading rather than mechanical work. Compare quotations, but avoid repeated full-surface scans.

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.