Kingston A400, Crucial BX500, ADATA SU630… SSD not detected: what to do?
In short: many cheap, widely sold SATA SSDs use the same controller, the Silicon Motion SM2259XT or one of its newer variants. When such an SSD is no longer detected, shows the wrong capacity or freezes your computer, the data is usually still recoverable in a lab, with equipment that supports this controller. Do not try to “repair” the SSD with tools found online: you risk erasing whatever is left.
Written after the workshop “SSD: SM2259XT, SM2259XT2 and SM2259XT3 with modern memory chips” at ACE Lab TechWeek 2026 (Alicante, October 2026). ACE Lab makes the PC-3000 range, the reference equipment used by data recovery labs.
Is your SSD affected?
The SM2259XT controller came out in 2019 and is still extremely common today. During the workshop, the ACE Lab engineer said he had recently bought 20 different SSDs for testing: 5 of them used a variant of this controller.
It is found in these models, among others (depending on the version and production date):
- Kingston A400 (some versions)
- Crucial BX500 (early revisions, from 240 GB to 1 TB)
- ADATA Ultimate SU630 and SU650
- Patriot P220 and Burst Elite
- Apacer AST280X
- AMD Radeon R5
- Verbatim Vi550 S3
- Kodak X100
- Hikvision E100N
- Fanxiang S109
The same model can switch controllers from one batch to the next. Only a diagnosis can tell exactly what is inside your SSD.
Why are these SSDs more fragile?
These SSDs are designed to be as cheap as possible, and the controller has evolved in that direction:
| Version | Year | What changes |
|---|---|---|
| SM2259XT | 2019 | Controller without DRAM cache, 4 channels, up to 1 TB |
| SM2259XT2 | 2022 | Simplified version: only 2 channels, writes go through an SLC cache only |
| SM2259XT3 | 2023–2024 | Optimised for QLC chips, the cheapest on the market |
QLC chips store 4 bits per cell. They are cheaper, but more prone to wear and errors than TLC chips (3 bits). The workshop even showed a 512 GB SSD fitted with PLC chips (5 bits per cell), run in QLC mode so they can work with this low-cost controller.
The controller stores its internal tables (the translator) directly in the memory chips. When it can no longer read them, the SSD disappears or shows a nonsensical capacity. In our experience, several causes can lead to this:
- memory wear: the cells produce more and more read errors;
- a power cut during a write;
- a firmware error;
- damaged electronics (power surge, short circuit).
What real cases show
- Most failures are recoverable. The PC-3000 supports all three variants of the controller, including versions with custom firmware (as used by Kingston) and Samsung chips with unusual configurations, added in the latest update.
- If the electronics have burnt out, the memory chips can in some cases be read on another compatible board, without needing an identical donor SSD.
- But not everything can be recovered. ACE Lab presented a 256 GB SSD whose chips had physically degraded: it only identified itself as a 64 GB drive. A donor makes no difference: when the memory itself has degraded, no tool can bring it back to life.
What to do right now
- Stop using the SSD and switch it off. Do not leave it powered on in the hope that it comes back.
- Never use reflashing utilities or “MPTool” (Mass Production Tool) found on the internet. These factory tools do not “repair” the SSD: they perform a low-level format of the memory chips. The SSD may work again, but empty: your data is permanently erased.
- Do not initialise or format the SSD if Windows offers to.
- Write down the exact model and what happened: power cut, update, drop, computer freezing…
How we handle it
At Belgium Data Recovery, we regularly recover data from SSDs with an SM2259XT controller, using the PC-3000 SSD utility on our PC-3000 Portable PRO; it supports all three variants of the controller.
- Free diagnosis: identifying the controller and the chips, assessing the chances, then a quote.
- Accessing the SSD through the controller's technological mode, reading adapted to the condition of the memory, and rebuilding the translator.
- Copying the data, then extracting your files.
- Your data is returned on a drive you provide, or on a Belgium Data Recovery drive at extra cost.
We work on a No Cure No Pay basis: if we cannot recover your data, you pay nothing. If you gave us a list of your important files and we recover less than 75 % of them, you can turn down the result at no cost.
Frequently asked questions
01My Kingston A400 is no longer detected. Is my data lost?
Not necessarily. The controller can no longer read its internal tables, whether because of a power cut, a firmware error or memory wear. In a lab, it is usually possible to read the chips and rebuild the data. The diagnosis shows what the chances are.
02How do I know which controller is in my SSD?
The model name is not always enough: the same model can use different controllers depending on the batch. We identify it during the free diagnosis.
03Can I update or reflash the firmware to repair the SSD?
Definitely not if you want your data back. Reflashing tools (MPTool) perform a factory format of the memory chips. The SSD may become usable again, but all your old data is permanently erased.
04My SSD shows a strange capacity. Is that serious?
An abnormal capacity (0 GB, 1 GB or far less than expected) often means the controller can no longer load its firmware or read its chips. It is often recoverable; if the memory is badly degraded, the chances go down.
05Should cheap SSDs be avoided?
They are fine for everyday use, but with regular backups. Their bare-minimum design makes them more sensitive to power cuts and wear.
Real cases handled in the lab
