Because of the complexity of solid state drives and SSD data recovery, as well as significant variations in wear-leveling algorithms between manufacturers of solid state drives, it's important to call data recovery experts with extensive experience with solid state drives. Do not attempt to recover your solid state drive data yourself -- this could result in permanent loss of your data.
Common reasons for SSD failure and data loss
- abrupt power loss
- magnetic fields
- electric charges
Solid state storage devices are manufactured with one of two types of NAND flash memory:
- single-level cell (SLC)
- multi-level cell (MLC)
MLC memory has more density, and therefore is less expensive, but is more prone to errors and also has fewer write/erase cycles.
The durability of a solid state drive is measured in its write/erase cycles, or the number of times a block can be erased and re-written to before that block fails. A technique called wear leveling dynamically maps logical blocks to physical blocks, to prevent premature failure of any block from too many write/erase cycles. This, along with multi-channel flash microcontroller technology, adds to the durability of a solid state drive, but block failure is also one of the key reasons for solid state drive data loss.
When a block can no longer retain data, or when data errors cannot be correct by the solid state drive's error correction algorithm, the drive's controllers merely"select"another block. But when all spare blocks are used, your solid state drive will fail and you'll need SSD recovery services to retrieve your data.