Pocket drives · power without mount · ADR-2025-3688
Yesterday It Mounted. Today There Is Only the Light.
There were no indicators leading up to the failure. On one day the drive was functioning in the manner it had always functioned; on the next day the same drive unit does not show up on my MacBook
, while the light turning on
carried on exactly as previously. She stated she had tried the obvious things prior to calling us. Both cable connections were checked. A second WD Passport hard drive belonging to her, which sat adjacent to the faulty unit, immediately mounted onto the same machine using the same lead: a spare performing the purpose a spare should serve, eliminating both the Mac and the leads and leaving the failed unit on its own. It was working yesterday morning
, she stated. This drive is her primary external hard drive
and contained most of her files required during that particular week.
Same story on yours? Tell us what it does — the look is free.
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What failed, and why.
A drive that ceases to operate between one morning and the next has not simply grown old. Wear shows itself in that it will slow, make a noise that nobody recognises, come and go over a fortnight and then stop dead. This drive operated as expected and then simply disappeared, which points towards only one failure mechanism as opposed to multiple mechanisms degrading together. The light narrows this down even further. A light lets you know when there is power to the enclosure, but tells you absolutely nothing regarding whether the disk within the enclosure is available to the computer. Everything that has to happen falls between these two pieces of information: the motor spinning up to speed, the firmware being accessed, the drive identifying itself, and finally a small printed circuit board taking this entire process and converting it into something a USB port can accept. In a portable case like this, the last piece is just a single component. With the week's worth of work stored upon it, the answer was never going to be to keep trying until it magically appeared. Each additional try is another go at whatever has failed.
What the bench did with it.
The order of the job →| Equipment used | Its work on this job | The reason for it |
|---|---|---|
| ACE Lab PC-3000 Express | Ran the disk on its own connector: motor operating properly, firmware responding, health statistics all within acceptable limits | This allows access to the manufacturer's service area (where normal ATA commands cannot go) |
| DeepSpar USB Imager | Tried the enclosure's own board first, therefore eliminating or confirming the presence of a bridge failure before disassembling the enclosure | Reads through the caddy's own USB board instead of going around it, at the rate permitted by the bridge |
| R-Studio Technician | Opened the Mac volume off the image and retrieved the folders she needed earliest | Constructs an array from the images, and reads nearly every file system |
What the bench did with it.
Started the same day, because the week would not wait
Within an hour it was removed from its enclosure and placed onto bench equipment where it responded to everything asked of it. It spun up to speed and remained spinning, the firmware responded promptly and correctly, and the health statistics it had stored described a drive that had not been struggling at all. Therefore there was only one possible location left for the fault to exist.
The board it was built with travels too
A portable WD unit ties its electronic components to the disk that it was originally created with. That is why a board taken from another unit produces a disk that mounts nowhere. That is also why the entire product must arrive intact and not as just a disk in an envelope. Hers arrived complete. The enclosure's board was tested before testing any other component, thus allowing a distinction to be made between a faulty enclosure and a faulty disk without having to remove the disk from its enclosure, and this produced quick results.
Verified in the order the week demanded
She sent us a short listing of what she required first. Subsequently, we checked each item against her request list instead of checking along the folder tree. The items that she required immediately were opened, read and returned to her ahead of everything else, and once those were away we completed verifying the remainder of the disk. A deadline does not care about the other nine tenths of a disk; it simply requires that specific folders open on time.
What went home.
Everything on her list was recovered successfully, and the work for the week was completed as scheduled. Afterwards, one behaviour she adopted was to make a copy of her primary Passport each evening after completing her work, using the spare Passport that had proved the cables.
Begin here if yours is doing the same thing.
Further portable-drive jobs, written up.
Yours doing something similar? Power it down first.
Published prices are fixed. Memory cards and USB sticks are £250 + VAT. Any stand-alone drive is £300 + VAT. Drive configurations containing multiple disks (RAID, NAS or server) start at £500 + VAT. First assessments are always complimentary. Thereafter, data recovery charges are also fixed in advance and in writing, so you'll always know how much you owe before paying any money. Shut it down, get a quote first (by phone or with the form), then send it in or drop it off at our Guildford intake laboratory, Monday to Friday, 9am to 5:30pm (no appointment needed). On most jobs you only pay if we recover your data.