An apprentice at an engineering firm on one of the A329(M) business parks is two years into a part-time degree. His Toshiba laptop had been slowing to a halt for months before it stopped booting altogether; the shop that fixed it fitted a new drive, handed the old one back in an anti-static bag, and told him a lab would have a better chance with it than they would. A year of coursework and a half-finished project report were on it.
| Media | A 2.5-inch Toshiba laptop drive removed and replaced by a repair shop after the machine stopped booting. It holds a year of degree coursework and an unfinished project report. |
| What was reported | Toshiba laptop hard drive, machine had been slowing for months then would not boot, drive replaced by a repair shop and returned loose, coursework and project report still needed from it. |
| Fault class | Logical, on a tired surface. The drive had accumulated a band of weak and unreadable sectors, some of them under the volume's index, which is why the machine had slowed and then failed to start. The mechanism was intact and the drive readied normally. |
| On the bench | Attached as a data device behind a hardware write blocker on PC-3000 UDMA with the firmware and defect lists reviewed first, imaged on DeepSpar with the weak band deferred and revisited on a restricted head map at reduced speed, the filesystem parsed in R-Studio from the image, damaged index records rebuilt, documents carved by content where entries were unrecoverable, everything validated and written to fresh media. |
A drive that will not boot is not the same as a drive that cannot be read. Booting asks a great deal: the machine wants specific files, in a specific order, within a specific time, and any one weak sector in the wrong place is enough to fail all three. Reading the same drive as an ordinary data device removes the deadline, and most of the time that alone is enough.
The months of slowing down were the drive telling him. When a drive meets a sector it struggles with, it retries. Retries take time, and a machine that pauses for several seconds at a stretch is usually a machine waiting on a disk, not a machine short of memory. By the time it stops booting the weak area has usually grown into something the operating system cannot work around.
Imaging out of order is what saves a tired drive. Reading start to finish means spending the drive's remaining good behaviour on the difficult part in the middle. The bench takes everything easy first, so that if the drive deteriorates the loss is confined to the region already known to be bad, then returns to that region deliberately, slowly, with the head map narrowed.
The shop was right to hand it over rather than try. A general repair workshop reads drives with software running on a live machine, which retries endlessly and hammers exactly the sectors that need the gentlest treatment. Handing it on cost the customer nothing and preserved the drive's remaining reads for someone with the equipment to spend them well.
The drive was attached as a data device only, behind a hardware write blocker on PC-3000 UDMA, and nothing was asked to boot from it. Its firmware and defect lists were reviewed first: the grown defect list was long, which confirmed a surface that had been degrading for a while, and the mechanism itself was healthy.
DeepSpar imaged it head by head with the weak band deferred, so the intact ninety-odd per cent was captured while the drive was still behaving. The bad band was then revisited at reduced speed with the head map restricted to it, which recovered most of it and left a small remainder unread. R-Studio parsed the volume from the image, rebuilt the damaged index entries, and carved the documents that had lost their references by content instead.
The coursework came back complete and the project report came back at its last saved state, which was two days older than he had hoped and a great deal newer than nothing. The small unread remainder fell in an area holding installed software rather than his own work.
One drive, £300 + VAT. This was logical work throughout, with no opening and no donor parts, so the job ran under no fix, no fee and was invoiced after he had confirmed what came back.
Keep it, and keep it unpowered. A drive taken out of a machine that would not boot is very often readable as a data device, but only while it has reads left in it, and plugging it into a caddy to browse around spends those on nothing. Do not run a consumer recovery tool over it either: those tools retry failed sectors relentlessly, which is the one thing a tired surface cannot take. If the machine had been slowing down for months beforehand, assume the surface is the reason and treat the drive as finite. Send it as it is, say what you need off it, and the imaging will be ordered to get that first.
These files are written up from genuine enquiries taken from households and businesses in Bracknell, across Berkshire and Surrey and into London, with names, firms and anything else identifying stripped out. Each one sets down how the fault was reasoned through, the method it actually needed and the equipment it was worked on. One of them is a job that was turned away, which belongs here as much as the rest of them.
Heads fly closer to the platter than a speck of dust is wide, so the drop does not have to be dramatic
When the machine, the cable and the caddy have all been eliminated, what is left is the drive itself
Where the flash is soldered flat to the mainboard there is no unit to send, and saying so at the enquiry costs nothing
Examining it is free and takes 2 working days from arrival, the figure goes to you in writing and does not move afterwards, and a logical fault carries no fix, no fee. Start online or ring the freephone.