The symptom · a disk nothing will show
A drive that no computer can see has not been wiped. What it has mislaid is the means of announcing itself, and that lives in the electronics and the firmware, neither of which is where documents are kept. Three questions in order tell you which of them has broken. Does the BIOS list it? Is it in Disk Management? Will Explorer open it? Whichever stage the drive drops out of is your answer — electronics, firmware, or else the volume. Disks reach this bench from every part of London with one sentence attached, that the computer cannot see it, and that sentence is describing a circuit. One drive costs £300 + VAT. Nothing is charged for the assessment. A written figure precedes any chargeable work, and on most jobs no invoice follows unless your files do.
Put it to an engineer — the first look costs nothing
0203 0868633
| How it shows itself | The usual reason for it | Where that leaves you |
|---|---|---|
| Windows reports Unknown, Not Initialized | The drive answers, but has no valid signature and no usable partition table | Turn that prompt down |
| A prompt reading “…before Logical Disk Manager can access it” | Agree, and a blank partition map goes over the lot | Shut it down, then pull the cable |
| Disk Management shows No Media | The controller alone is replying and nothing behind it can be reached, which makes this hardware rather than a logical fault. | Keep it unplugged from here on |
| No drive at all in the BIOS | Electronics or firmware — a finished board, a shorted protection diode, service-area code that will not load | A repair at component level |
| A 1TB disk listed by the BIOS as 8MB | Damaged firmware, or a damaged translator, so the capacity it reports is meaningless | Firmware tools rather than software |
| It draws power and does nothing else | Its power circuitry has failed, and the TVS diode went short in the process | Usually still recoverable |
A case number goes on it the day the parcel lands, and an engineer settles what has truly failed before anything else happens — free of charge, and first in the order of work. Back to you come two things together: a straight note of what is liftable and what is not, plus one figure, fixed and written down. Accept it, or decline and owe us nothing.
Nothing gets opened here, and nothing is set running while nobody watches. A moment in the BIOS to begin with. Disk Management second. Explorer third. By the end of those three the job has narrowed to mending electronics, or rebuilding a service area, or putting a file system right on the copy.
Off comes the shorted TVS diode and a fresh one replaces it. Where a board cannot be saved, a donor deputises for it and takes your own ROM chip across, since the adaptive values written on that chip came from your platters and fit no other disk.
A sector-by-sector copy is made the moment the drive answers. Everything from then on runs against that copy, with your own drive shelved and untouched.
What was recovered is listed for you first, and only then does a bill exist. Approve the list and it is invoiced; turn it down and it is not — and where nothing has come back, most jobs carry no charge whatever. Recovered data travels home on fresh media bought in for your job, with the postage at our end. Your case is not closed until you have read those files on a machine of your own.
Worth keeping hold of: when a disk turns up unseen by its computer, the explanation is almost always an electronic fault or a firmware one. Both exist to manage the introduction between a disk and a machine; neither goes anywhere near the part where documents are kept. An absent drive is therefore reporting a hardware problem about itself and nothing further, which is why work of this kind has a better ending than most. Establishing which of the two you are holding costs nothing.
Mains power failed overnight at an office and by morning the desktop was listing one disk where it had listed two. The WD was silent, the BIOS gave it no entry at all, and the TVS diode on its board turned out to be the whole of the fault. Its own ROM went across onto a donor PCB, and a complete image was made of the drive two days after the parcel landed.
Generally, yes. A finished board gets mended or swapped, and whatever finished it seldom carries on through the electronics to reach the platters — or, on flash, the NAND sitting behind them. Among all the ways a disk can go wrong, complete silence is one of the more predictable.
No, never. What that box writes is an empty partition map, laid straight over the one that records where everything sits. Decline it, take the drive out, and let an engineer look before anything else has a turn at it.
No. What a drive in that state has mislaid is its means of introducing itself, not anything ever written to it. The trouble lies in the electronics, or else in firmware held in the service area — and no file of yours is kept in either.
Very likely. The spike goes into a protection diode that shorts itself, which is the entire reason it is there — to go first, ahead of anything dearer. The electronics are finished; whatever you saved sits where you saved it.
Looking at it is free. Back comes a list of what opened and what did not, together with a single price to finish, set down in writing while you are still free to say no. On most jobs an invoice only follows the data. Until that list reaches you, leave the drive switched off.