Apple machines · lab record · NTG-2025-1757
One Tick, a Long Pause, Then Another.
An unfastened rucksack, a kerb on a Chesterfield street, and the drive was down on the pavement. Rubber cladding is remarkably good at convincing people that nothing has happened. On this one sat twelve years of drawings by a measured-building surveyor, together with the site photography that goes with that work. Afterwards, in his words, it will not mount on either Mac
. Put an ear to it and there was a tick, several seconds of nothing, then one more tick — quiet enough to persuade yourself the whole thing was imagination.
Yours doing the same? Say what it is up to — looking is free.
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What went wrong, and why.
Your ear is describing the enclosure and not the damage. A full-size platter moves more air than a 2.5in one. Light shells conduct sound badly. And rubber round a Rugged is fitted to absorb noise as much as knocks. None of that has any bearing on the platters below. Once the shell comes off, both noises turn out to be a single event on repeat — the faint tick here, the heavier thud out of a desktop unit: a head hunting for a servo mark, failing to find one, backing away, coming round again. Every one of those passes carries a head over the surface holding your files.
The bench work this one took.
How the work runs →| Kit on the bench | What it did on this job | Why we reach for it |
|---|---|---|
| DeepSpar Disk Imager 4 | Graded the replacement heads once fitted, and set the running order from that | One platter side per pass, with the heads mapped before a single sector is taken off, and the resets, the timeouts and the power all held under our control |
| PC-3000 Data Extractor | Crossed each band of the surface in turn, and wrote down every reset | Reads through the drive's own firmware and controller instead of working round them |
| UFS Explorer Professional Recovery | Put the whole HFS+ catalogue back, which beats carving on an Apple volume | Reads APFS, ReFS, XFS, ZFS and Btrfs where other tools give up |
What happened on the bench.
Loud or quiet, it is handled the same way
Nothing got power until the drive was open under a bench lamp. Damage on the platters was ordinary and small in scale — contact marks near where the heads park, and the rest of the surface almost unmarked. He made two attempts and then stopped, which is precisely why there is nothing here worth photographing.
Sort the heads out first; image second
No donor was accepted until family and production window agreed. With its stack in, each head was tested on its own; all worked, one noticeably more weakly, so the opening pass went to the strongest and the weak one waited until everything else was done.
Give HFS+ the structure it is looking for
One structure decides it: whether an archive comes back as an archive or as numbered files in a heap. On HFS+ that structure is the catalogue file, which carries the index for the whole volume. Get it out of the image undamaged and the rest falls in behind. His came out undamaged. Drawings arrived under their own names, in folders by year, each survey date still attached, rather than as something to open one file at a time.
What was returned.
Nothing was absent. From the rebuilt volume two jobs were opened: the oldest year on that disk, and the newest — photographs in one and drawings in the other. It all came back because he tried twice rather than twenty times.
Start here if the same thing is happening to yours.
Other Apple jobs in the casebook.
Sounds like yours? Switch it off before anything else.
£250 + VAT covers a card or a USB stick; a single drive is £300 + VAT; RAID and NAS start from £500 + VAT. Nothing is charged for the first look, and a fixed figure reaches you in writing before any chargeable work begins. Switch the device off, leave it alone, and post it in. On most jobs, no data back means no fee.