Case record · Portable drives · MKD-2025-5134
Five Soft Hums, the Same Every Time.
A move to Leighton Buzzard cut the last copy short — the lead came out while the drive was writing — and the Passport then wintered in a drawer. Plugged in again in March, the laptop still plays its little tune
, and Windows will offer to eject it, though no drive letter turns up. Only a routine you can count off: five soft hums, then nothing
, the same number every time. On it: twelve years of camcorder tapes, and her mother's albums scanned page by page.
Same fault? Start here.
0800 6890668
Without the jargon.
Why five, and why always five? The number lives in the firmware. On power-up the drive orders the motor to turn, tests whether the platters reach speed, and after a set number of failures gives up rather than cook the coil. Those counted hums are the drive hitting its own limit, because something inside will not turn. The USB electronics are a separate small computer sitting in the enclosure, and they are in perfect health, which is why Windows chimes politely, lists a device, and offers to eject a drive it cannot read a single byte from.
The kit this job needed.
See how a job runs here →| Kit | Why it was used | What it gives us |
|---|---|---|
| ACE Lab PC-3000 Express | Observed the five attempts on regulated power, then oversaw the read once it turned | Talks to drives in each maker's own command set, beyond what standard ATA covers |
| DeepSpar USB Imager | Read it through the original USB board so WD's on-board encryption stayed intact | The same steady imaging, only run across the USB bridge |
| UFS Explorer Professional Recovery | Opened the finished image and went through the folders to prove each one | Ahead of the pack on difficult filesystems: APFS, ReFS, XFS, ZFS, Btrfs |
What happened on the bench.
Repeat it once, on a supply with a meter on it
One controlled repetition on a current-limited supply settled it: five climbing surges as the motor leaned on something, no sign of the platters reaching speed, and then the firmware calling a halt. That pattern means the spindle was fighting a fixed obstruction. It also meant that each attempt at home had at least ended harmlessly.
Open it and get the heads off the platter
Clean air gave the history away. The interrupted copy had left the heads sitting over the data area rather than parked on their ramp, and months in a drawer had glued them there. They were worked loose gently, and both landing marks were examined under magnification before the motor was allowed another go.
One continuous read, through its own bridge
My Passports do their encryption on the USB board, so the image was taken by way of the original bridge, with imaging hardware sitting behind it — read the way WD built it to be read. It ran without a break from the first sector to the last. Heads that have once stuck to a platter never get a second cold start.
The outcome.
All of it came home — the tape transfers, every scanned album page, the lot — handed back on new media with one instruction attached. Keep the second copy somewhere that is not your own house. The Passport has been retired, its counting career over.
Other jobs from the casebook.
Also filed under Portable drives.
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.