Mac & Apple · case record · MKD-2025-4621
It Mounted at a Crawl, So I Ejected Early.
The Backup Plus lived in a Leighton Buzzard piano teacher's car boot, carrying eleven years of recorded lessons she sends home to pupils. One morning mounting took a good ten minutes with the wheel going round
, so she unplugged it, assuming the Mac had frozen
. Two or three attempts later it would not show up on anything
. There was no second copy.
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Without the jargon.
A ten-minute mount is a disk telling you what is wrong with it. macOS cannot display a volume until it has read the catalogue, and if those particular sectors sit on deteriorating surface, each read turns into a run of retries that the Finder simply sits through. The cruel part is that the obvious response — unplug, plug back in — is the worst one. Every attempt drags the heads over the weakest area again, and ground that was merely slow in June can be gone by August.
The kit this job needed.
See how a job runs here →| Kit | Why it was used | What it gives us |
|---|---|---|
| DeepSpar Disk Imager 4 | Handled the copy on soft settings, with mounting ruled out entirely | Maps the heads, then images each — resets, timeouts and power cycles controlled |
| UFS Explorer Professional Recovery | From the copy, raised the HFS+ volume with its catalogue complete | Ahead of the pack on difficult filesystems: APFS, ReFS, XFS, ZFS, Btrfs |
| ACE Lab PC-3000 Express | Located the failing band beneath the catalogue through firmware access | Talks to drives in each maker's own command set, beyond what standard ATA covers |
What happened on the bench.
No more plugging in, from arrival onwards
The Seagate met no operating system after it arrived; it talked only to bench hardware. Firmware access showed the shape of it plainly — a widening band of failing sectors sitting exactly where HFS+ keeps its catalogue. That explains the crawling mounts, and it explains why the drive eventually went quiet.
Catalogue first, and taken at a crawl
The copy ran in a deliberate order. Catalogue and metadata regions were taken first, slowly, with retries capped — those are what turn sectors into pupil names and dated folders — and the audio followed in bulk. For the record, her pull on the cable had done no damage at all.
Rebuild the volume off the copy
All the rebuilding was done on the finished copy, never on the drive — that is the difference between an archive still filed by pupil and year and a pile of numbered strays. Names, folders and dates came through with the recordings.
The outcome.
The archive went home in its own folders, and she played lessons from three different years before signing off. Nine recordings from the worst band came back truncated, each one listed.
Other jobs from the casebook.
Other Apple and Mac cases.
Does that sound like your device?
One lesson runs through the lot: cut the power, let us look for free, then decide with the facts in hand.