Home / Case Studies / Trust, Practice & Honest Limits
Trust, Practice & Honest Limits · case file

I Opened It and Moved the Head

A drive opened outside a clean-air cabinet to free a stuck head, where the head has since touched and scratched part of the platter's outer edge, is not necessarily beyond recovery — the scratched band is the real limit, where the surface is damaged, but the rest of the platter is usually intact and still reads — reached by re-cleaning and reheading the drive in clean air and imaging the good regions, an honest partial. The read of the fault was right, a stuck head; the home repair added contamination and a scored band, so the recovery works the intact surface around the damage. His drive stopped, and after looking online he tried "opening it and fixing the stuck head", but "moved the head closer to the platter", leaving "some scratches on part of the outer edge of the platter"; he hopes to "recover even a small amount of the data". A scratched band is the real limit, not the whole platter — the intact regions are imaged, an honest partial. The intact regions are imaged in clean air.

Hard DriveClicking / Mechanical
// case at a glance
MediaA drive opened at home to free a stuck head, the head having touched and scratched part of the platter edge.
Reported situationHard drive · stopped working · opened outside clean air to free a stuck head · head moved onto the platter · scratches on part of the outer-edge surface · partial recovery sought.
Fault classA head fault compounded by a home repair — a scored band on the outer edge and contamination from open-air work; the scratched region the real limit, the intact surface still readable, reached by re-cleaning and reheading in clean air and imaging the good regions, an honest partial.
Equipment usedThe drive taken into clean air under laminar flow and cleaned of open-air contamination, the platters and the scored band inspected under stereo microscope · fresh matched heads fitted and alignment set, the damaged band mapped and avoided · imaged in careful passes on DeepSpar behind PC-3000 UDMA, reading the intact regions and skipping the scored zone, the recovered data validated in R-Studio.
// the decode

The decode

The read of a stuck head was right. That the drive had stopped with a stuck head was a correct reading of the fault, because a head settled onto or seized against the platter does stop the drive, and freeing the mechanism is part of the repair. The diagnosis was sound: the fault was in the heads, as he judged. What changed the picture was not the diagnosis but the way it was approached, where the added damage came from. The read of a stuck head was right.

Open-air work added the scratch and contamination. Opening the drive outside a clean-air cabinet and moving the head onto the platter left scratches, because a drive's heads fly a fraction above the surface in filtered air, and in ordinary air dust settles while a head touched to the surface scores it. So the drive has its original head fault plus a scored band and open-air dust, the scratch confined to where the head touched. Open-air work added the scratch and contamination.

The intact regions are imaged, an honest partial. Because the damage is a confined band, the recovery reads around it — the drive re-cleaned, fresh matched heads fitted, the scored zone mapped and avoided, and the intact regions imaged in careful passes, so the data outside the scratched band is recovered while the damaged band may be lost. It is an honest partial: the scratch limits part of the surface, not the whole platter, and much of the drive can still read. The free diagnostic maps the damage and the recoverable extent before any work is agreed.

The honest prognosis is a partial, set by the scratch. If the scored band is narrow and the rest intact — common where a head touched only the outer edge — imaging the good regions recovers much of the data, sometimes most, the files on the damaged band the likely loss. If the head scored more widely, the recoverable portion is smaller, confirmed before you decide.

// on the bench

On the bench

The drive was taken into clean air under laminar flow and cleaned of open-air contamination, the platters and the scored band inspected under stereo microscope. Fresh matched heads were fitted and alignment set, the damaged band mapped and avoided. It was imaged in careful passes on DeepSpar behind PC-3000 UDMA, reading the intact regions and skipping the scored zone, the recovered data validated in R-Studio.

// the outcome

The outcome

The intact regions imaged in clean air, the scored band avoided, and the recoverable data validated onto fresh media. The diagnostic stage is free and reports back within two working days of the media arriving; after it you hold one written quote, fixed with VAT included. Opening a drive commits donor stock and clean-air bench time, so half the quoted figure is payable before that stage begins, and the remaining half falls due only once the recovery has succeeded — if it fails, the rest is never billed. The decode: a scratched band is the real limit, not the whole platter — the intact regions are imaged, an honest partial. Read around the damage, much of your data comes back.

A drive opened at home that scratched a platter

The read of a stuck head can be right — a head settled against the platter does stop a drive. But open-air work adds harm: heads fly a fraction above the surface in filtered air, so in ordinary air dust settles and a head touched to the platter scores it, leaving a damaged band. The scratched band is the real limit, not the whole platter: the intact surface still reads. It's re-cleaned and reheaded in clean air, the scored zone mapped and avoided, and the good regions imaged, an honest partial. If a drive is opened at home, stop and set it aside. Have the intact regions read in clean air.

Sending this in from Swindon? Every case opens with the free diagnostic — completed within 2 working days of your media arriving — and one fixed written quote before any work: logical jobs run no fix, no fee; invasive drive-opening work takes 50% of the quote upfront; forensic-classed work is payable upfront in full. If the data is inside a laptop, PC, Mac or server, remove the hard drive or SSD and send us just the drive; we don’t provide an internal drive-removal service, and we don’t recover storage soldered to a motherboard (e.g. Apple Silicon Macs) — only drives that can be removed and sent to us. Post or courier tracked and insured to Oxford Data Recovery, John Eccles House, Oxford Science Park, Robert Robinson Avenue, Littlemore, Oxford, OX4 4GP — full sending instructions and the shipping form are here.
Start a free diagnostic

Our case files are written up from genuine enquiries our lab has handled for customers across Swindon and Wiltshire, anonymised to protect client confidentiality. Each one describes the diagnostic and recovery approach our engineers apply to that fault, using the equipment listed.

// related case files

More cases like this one

Browse all case studies →

Got a device with a story like this?

Free diagnostic, fixed quote, no fix no fee — start now or call the freephone.