Data Recovery Case File · Second Fixes & Trade Handoffs · What a Previous Opening Changes
Drive Opened Before: What a Previous Intervention Changes
Her enquiry asked a question this archive is often asked and rarely gets to answer at length. An external hard drive "that got dropped and is now making a clicking sound when plugged in." Then the complication: it previously belonged to her brother, who works in computer engineering, and it has been opened and worked on before — under proper filtered-air conditions rather than on a kitchen table. "Will this impact the recovery at all? He has said that I probably need a new assembly arm, so he isn't able to help in this instance." Three things deserve saying. Her question is exactly the right one to ask. Her brother's diagnosis is credible and matches the symptom. And the honest answer to whether a previous opening counts against her is: it depends entirely on the conditions it was opened in — and by his account, hers were the right ones.
| Media | External hard drive subject to an impact — clicking on connection; previously opened and worked on under filtered-air conditions by a competent third party |
| Reported situation | Drive dropped and now clicking · prior intervention disclosed openly by the owner · previous handler's assessment: head assembly replacement required · handler declined to proceed further |
| Fault class | Head assembly failure following impact, on a drive with a documented prior opening — contamination and alignment to be assessed before service |
| Equipment used | Laminar flow bench inspection for contamination, particle damage and prior disturbance · matched donor head service · Atola Insight Forensic post-service assessment · PC-3000 Express with Data Extractor head-mapped imaging |
The decode: what a previous opening actually changes
The honest answer, and what it turns on: a drive that has been opened before is assessed on three questions, and none of them is simply "was it opened". Did contamination enter? A drive opened in ordinary room air admits dust and fibres, and a particle circulating between a head and a platter at operating speed will score the surface — that is the real damage a bad opening does, and it is permanent. A drive opened under filtered air at a proper bench does not have that problem. Were the heads disturbed? Removing or repositioning a head assembly without the correct tooling can bend the arms or allow the heads to touch, which turns one fault into two. Was it run afterwards? A contaminated drive that has been powered up has had the opportunity to distribute whatever got in.
Why her situation is the good version: on her account the work was done under filtered-air conditions by someone who works in the field, and he stopped rather than improvising a repair he lacked the parts for. That is close to the ideal prior intervention: the drive was opened properly, assessed, and closed. What it means practically is that the previous work is likely to be neutral — the recovery proceeds as it would have anyway, after an inspection to confirm no particles were introduced and no alignment was disturbed. It is not a black mark, and any firm treating it as one is either being lazy or looking for a reason to charge more.
Where a previous opening genuinely does hurt: stated plainly, because the internet is full of encouragement to try. A drive opened in a bedroom, a garage or an office — the video-tutorial route, with a screwdriver and a hopeful expression — is a materially harder case afterwards, and sometimes an impossible one. Not because the seal was broken, but because of what came in with the air and what happens the moment the platters spin again. This archive's advice remains unchanged: if the data matters, the drive is opened once, at a proper bench, by someone with the donor parts already to hand.
His diagnosis, credited: "you probably need a new head assembly" is consistent with the clicking, the drop, and the drive's behaviour, and reaching that conclusion and then declining to proceed is exactly the judgement this archive keeps hoping to find in the trade. He knew the fault, knew what it required, knew he did not have it, and said so. Her drive arrived in better condition because of it.
On the bench
The drive was not powered on arrival, and the inspection under the laminar flow bench asked the prior-opening questions first: whether particles or fibres had been introduced, whether the platter surfaces showed the fine circular scoring that contamination leaves, and whether the head assembly's alignment had been disturbed by the earlier handling. It had not — the previous work had been done properly and left the drive as it found it. Matched donor heads were then fitted for the fault the impact had actually caused, the Atola Insight Forensic confirmed the serviced mechanism, and imaging ran on the PC-3000 Express under Data Extractor, head-mapped and prioritised, in one supervised session.
The outcome
The prior work confirmed as clean, the head assembly 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 answer to her question, for anyone in the same position: a previous opening is not automatically a problem — what matters is whether it admitted contamination, whether the heads were disturbed, and whether the drive was run afterwards; opened properly under filtered air and then closed, as hers was, it is usually neutral and should not be treated as a black mark. Opened in ordinary room air, it is a genuinely harder case, because a single particle between a head and a platter scores the surface permanently. And disclose it either way — a bench that knows what it is looking for inspects for the right things.
Your drive has been opened before
Say so up front — it is not something to hide, and it changes what a bench inspects rather than whether they will help. What matters is the conditions. Opened at a proper bench under filtered air and closed again, a previous intervention is usually neutral: the surfaces are checked for contamination and the head alignment for disturbance, and the recovery proceeds normally. Opened in a room, a garage or an office, it is a materially harder case — not because the seal was broken, but because dust and fibres get in, and a single particle between a head and a spinning platter scores the magnetic layer permanently. The worst version is a drive opened in ordinary air and then powered up, which distributes whatever came in. So if the data matters, don't open it yourself, don't let a well-meaning friend try, and if someone competent has already looked and stopped, bring their assessment with the drive.
It may count for nothing against you — call Leeds Data Recovery on 0113 322 3083; inspected for contamination and disturbance first, heads replaced with matched donor parts, imaged in one session.
Request a quote online →
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.