Hard drives tend to warn you before they fail – they slow down, make noises, throw errors. SSDs often don’t. One day the computer boots normally; the next it says no boot device was found, or the SSD simply isn’t listed anywhere. This guide covers why SSDs fail this way, what you can check yourself, and why SSD recovery is different from hard drive recovery.
Why SSDs fail suddenly
An SSD has no moving parts. Your data is stored in NAND flash chips, and a controller chip decides where every piece of data physically goes, translating between what the computer asks for and where it is really stored. Common failures include:
- Controller or firmware failure – the controller locks up or its internal mapping tables become corrupted, so the drive shows up with the wrong name, as 0 bytes, or not at all.
- Power events – a power cut or surge during writing can corrupt the controller’s tables or damage components.
- Worn-out flash – NAND cells can only be written a limited number of times; heavily used drives can reach the end of their life.
- Physical damage – cracked boards, damaged connectors, or liquid in laptops.
What you can safely check
- For an external SSD, try one different cable and port, plugged straight into the computer.
- For an internal SSD, check whether it appears in the BIOS/UEFI setup screen. If it does, the problem may be with the operating system rather than the drive.
- Check whether the drive shows with a strange name or capacity in Disk Management (Windows) or Disk Utility (Mac) – but don’t initialise, format or “First Aid” it.
Things not to do
- Don’t update the firmware or run the manufacturer’s “secure erase” or reset tools. These can wipe the very mapping data a recovery depends on.
- Don’t keep the drive powered on for long periods trying different things. Many SSDs run background clean-up routines that can permanently clear deleted or remapped data.
- Don’t accept an offer to initialise or format the disk, even if the files look gone.
Why SSD recovery is different
With a hard drive, data sits in predictable places on the platters. On an SSD the controller scatters it across the flash chips, often with encryption built in. That means you can’t just read the chips and get your files – the controller’s logic has to be repaired or reproduced. In the lab we work at controller and firmware level to get the drive responding again so it can be imaged, and on some drives work directly with the flash memory. Modern NVMe drives that are soldered to a laptop’s motherboard need their own approach again.
See our SSD data recovery and laptop data recovery pages for the drives we work with, or call 020 7394 2525 for advice. The sooner a failed SSD is switched off and left alone, the better the chances.