Case notes · Desktop externals · MKD-2025-5124
I Used DMDE and the Grinding Started.
Twenty years of mobile discos lived on the Expansion — every set I have played and every one I recorded
— until Disk Management showed it all as unallocated
and offered to initialise it. He refused, then read a forum and set a full DMDE scan going last thing at night
. By morning the log counted errors in the thousands
. The drive had a new voice too: a grinding you could hear from the hall
. His email ended: I left it running far too long
.
Same fault? Start here.
0800 6890668
Without the jargon.
The word 'unallocated' was a symptom, not the illness. When a drive suddenly loses sight of its own partitions, the usual reason is heads that have begun misreading, and the worst available response is a full-surface scan. That marches a weakening mechanism across every sector on the disk for hours on end, which is precisely what a failing head cannot endure. At some point in the small hours the weakest of them stopped flying and began to touch. Grinding is that contact turned into sound. Every minute after it started cost surface and bought nothing at all.
The kit this job needed.
See how a job runs here →| Kit | Why it was used | What it gives us |
|---|---|---|
| DeepSpar Disk Imager 4 | Surveyed every surface, separating what the night had spared from what it cost | Maps the heads, then images each — resets, timeouts and power cycles controlled |
| PC-3000 Data Extractor | Drove the salvage pass in long unbroken runs, taking sound ground first | The PC-3000 imager, driven from the firmware side of the tool |
| UFS Explorer Professional Recovery | Rebuilt the filesystem and put the tracks back where their folders had them | Ahead of the pack on difficult filesystems: APFS, ReFS, XFS, ZFS, Btrfs |
What happened on the bench.
Total up the night before promising anything
Inspection found a stack of heads at the very end of their life, and platters marked in bands — faint in places, heavier where the scan had lingered. The mercy was the hour he stopped. Cutting the power over breakfast, instead of allowing it one more night, is why this case has a middle and not simply an end.
Heads first, figures only once the map is drawn
A matched donor stack gave the drive its sight back, and the surface survey drew honest lines. Wide regions read quickly and cleanly. Against them stood the scarred bands, where the signal simply fell away. Nobody discussed how much was coming back until that map was on the screen in front of us.
Secure the good surface, tread lightly on the rest
The read went in long uninterrupted sweeps, with the actuator asked to move as seldom as possible, because every seek over a marked platter can carry debris somewhere new. Clean regions were taken whole and made safe first; the scarred bands came afterwards — short passes, low speed, accepting whatever each one offered.
The outcome.
Most of the library came back with its folder structure intact. What did not came out of the scarred bands, and the report named it: a run of albums he can buy a second time, and four recorded sets he cannot. That is the trade this case made, written down plainly rather than rounded up.
Other jobs from the casebook.
Other Desktop externals 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.