Casebook entry · Portable drives · EDR-2025-2319
Six Weeks of Fading, Then Nothing on Tuesday.
For six weeks the volunteer who keeps an east Devon village archive watched his drive fade: it takes longer every time I plug it in
, then half the pictures never draw their thumbnails
, and finally last Tuesday it never appeared at all
. On it sat a decade of scanned photographs and parish newsletters — and the borrowed originals had long since gone back to their owners.
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In plain English.
A drive does not slow the way a hinge stiffens; it slows because it is re-reading. Sectors that once answered first time now answer on the fifth try or the fiftieth, and each retry is delay you can feel. Thumbnails vanish early because drawing one means fetching real file contents, retries included. And the morning the drive fails to appear is the same arithmetic applied at mount time — the checks it must pass to present itself now take longer than the computer is prepared to wait.
The tools this job took.
See how your case runs →| System | The part it played | Why we rate it |
|---|---|---|
| DeepSpar Disk Imager 4 | Completed the deep passes at SATA level, timeouts tuned around the soft head | Images by head map — timeouts, resets and power-cycling managed per head |
| DeepSpar USB Imager | Took the opening copy through the Hitachi's own socket, no operating system involved | The same careful imaging, run over the USB bridge instead |
| UFS Explorer Professional Recovery | Reassembled the folder tree from the images and staged it onto the new disk | Handles the harder filesystems well — APFS, ReFS, XFS, ZFS and Btrfs |
On the bench.
Stop using it normally, start measuring it
Nobody opened a single folder on arrival. A sinking drive holds a limited number of reads, and browsing spends them on nothing. Measurement came instead: reallocation counts high and still climbing, and a survey showing one of the four heads answering late and getting later — its territory holding exactly the pictures whose thumbnails had been failing him.
Take the easy majority while it is still easy
The capture ran confidence-first: three sound heads at full speed, clean zones swept in hours, the archive's healthy bulk banked before the drive was asked a single hard question. Only then did the settings change — longer waits, managed resets — and the work turn toward the ground that had been failing.
Coax out what remains, then rebuild on something trustworthy
The soft head's ground was gone over at walking pace, the drive rested and power-cycled between stalls. Everything recovered was laid onto a new drive in the archive's original folder order, so the group could plug in and simply carry on filing.
How it ended.
Nearly all of it survived: the newsletters, the minutes, the great majority of the scans. A cluster from the earliest scanning sessions lay in the soft head's worst stretch and returned damaged or not at all — named file by file in the report, so the group knows exactly which originals to ask to borrow again.
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Sound like your drive?
Every case here points the same way: power the device down, take the free diagnosis, then make your decision.