From the bench · Portable drives · MHD-2025-6319
It Made Him Wait, Then It Stopped Appearing.
What the drive carried was a parish record: minute books scanned as far back as the 1890s, research into the war memorial, and photographs collected at open days. Its decline ran over six weeks, and the clerk of a village outside Ascot watched every stage of it — a minute to appear, then five minutes
, then a folder opens and the wheel just turns
, and at the end the light is on and nothing comes up
. Someone had told him to defragment it. He had never found the time, which was fortunate.
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In everyday terms.
A delay you can feel at the keyboard is arithmetic, not age; nothing inside has grown stiff. A sector that reads on the second attempt costs a moment; one that reads on the fiftieth costs far more, and the totals climb as the failing area spreads. Thumbnails suffer first, because drawing one obliges the disk to fetch the whole file, retries included. The day it will not come up at all is that same arithmetic run once more while the volume is mounting — the checks a drive must pass before a computer will list it now take longer than the computer will wait.
What the bench used here.
How a job is handled →| Tool | Why we used it | What it brings |
|---|---|---|
| DeepSpar Disk Imager 4 | Completed the difficult passes over SATA, timeouts tuned to the slow head | Head map first, then head-by-head reads, holding resets, timeouts and the power line steady |
| DeepSpar USB Imager | Ran the opening sweep through the caddy's own USB port, no operating system in between | Imaging held to the usual pace, over the USB bridge |
| UFS Explorer Professional Recovery | Raised the folder tree from the images and wrote it out onto the new disk | Reads the awkward filesystems others stumble over: APFS, ReFS, XFS, ZFS, Btrfs |
The lab work.
Measure the drive rather than explore it
Not one folder was opened on arrival. Whatever reads a dying drive still has in it are finite, and using them to satisfy curiosity uses them for nothing at all. So the first work was measurement: a reallocated-sector count already high and still rising, and a head survey in which one of the four was answering late and growing later. The region that head covered held exactly the files whose previews had stopped working.
Take the easy ground before it stops being easy
Imaging ran in order of confidence, not in order of address. The three sound heads worked at full speed and had the healthy zones off within a working day, so the bulk of the archive was secure before the drive was asked anything difficult. Only then were the settings loosened — longer waits, controlled resets — and the passes moved onto ground that had been letting him down for weeks.
Take the failing head at a crawl, then rebuild on sound media
The ground belonging to the slow head was worked at walking pace, with a rest and a power cycle after each stall. What came off it went onto a new disk in the folder order the parish had always kept, so the council could connect it and resume filing at the point where it had broken off.
How the job closed.
Very little was lost. The minute books came back, the memorial research with them, and most of the open-day photographs too. A group of files from the earliest scanning sessions lay under the slow head and returned damaged or not at all; each is named in the report. The minute books can be scanned again, since the originals sit in the parish safe. The borrowed photographs went back to their owners years ago.
More of the jobs we've closed.
Filed under Portable drives too.
Does any of that match your case?
Nothing needs deciding until the diagnosis is back: switch the device off, send it in, and let the findings settle it.