External drives · bench log · ADR-2025-3684
Turning Is Not the Same as Answering.
He had completed the task prior to calling us and he had completed it in the right sequence. The laptop suddenly stopped working
. Someone viewed the laptop and claimed it was because of the disk. He replaced the SATA cable and noted that it made no difference.
He then removed the disk from the first laptop and attached it via a USB adapter to a second laptop. On this second laptop he obtained the single result that determines everything else: the second laptop does not recognise that the hard drive is connected
, and yet the disk does whirl when plugged in
. He could hear it and he could feel it. Two laptops, one cable swap and a disk that was clearly alive.
Same story on yours? Tell us what it does — the look is free.
0203 0868633
What failed, and why.
The process of bringing a platter to operational speed is the very first step a disk takes, and it represents the least of what a disk must accomplish. Once that is complete, the disk must read its own operating software located on a reserved portion of the disk's surface; the disk must calibrate the heads against what is found on the reserved portion; the disk must build a table that converts a sector number into an actual location on the disk; and only once that is complete may the disk report its existence to whatever entity is requesting such identification. A disk that spins but reports nothing has progressed partway through these steps and halted somewhere along this path. There are generally three places where a disk halts: the firmware area, the disk controller board or the heads. None of these areas can be accessed using a USB adapter. This is not indicative of an error with the adapter. An adapter merely serves as a translator. It facilitates communication between a device and a disk that is willing to communicate. However, an adapter lacks a language for communicating with a disk that refuses to provide self-introduction. Therefore, when his second laptop indicated that no media was connected while the disk continued to rotate in his hand, it simply illustrated that the second laptop had been unable to establish contact with something that refused to acknowledge its presence.
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 | Placed on the bench via its service port, and asked why it would not identify | This allows access to the manufacturer's service area (where normal ATA commands cannot go) |
| DeepSpar USB Imager | One run, first sector to last, at whatever rate it was willing to provide | Reads through the caddy's own USB board instead of going around it, at the rate permitted by the bridge |
| UFS Explorer Professional Recovery | File system opened on the copy, with the folders checked there rather than on the disk | When other applications will not open it, this application will open APFS, ReFS, XFS, ZFS and Btrfs. |
What the bench did with it.
Ask it something the adapter cannot
The bench speaks directly to the disk via a channel that is open prior to the disk's self-identification, which is the entire purpose of that channel. The draw was metered going up and the trace looked normal: the current rose as the motor engaged, then stabilised, precisely as he had described based on how it sounded. That being said, what never arrived was the part where the disk would report what it is. It spun continuously and returned no information, and the conversation ended at the same spot each time it was attempted.
Sort out the reason it stays quiet
Everything that followed took place below the interface, which is where a disk maintains its operational code and the tables it requires before it can communicate. After the board was inspected and cleared, the reserved area was read module by module, and once the disk could load the data it needed, it identified itself and correctly reported its size. Everything appeared identical externally; it rotated both before and after the repair. However, the main distinction was that it now responded.
Copy it now, while it will let you
A disk that has just been persuaded to identify itself does not make for a disk you want to go browsing through, therefore nothing was accessed and nothing was displayed until a copy of everything existed. A single pass ran it from start to finish. The speed remained constant and the defect list added nothing new, and everything the client ultimately viewed was obtained from the copy as opposed to the original disk.
What went home.
The lot went home on new media. He substituted a lead, borrowed a laptop and stopped, thus this was a relatively simple job versus an interesting one. The disk itself is done with. Pricing came from the published price list (a single drive: £300 + VAT), and he knew the price before the work started.
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.