Originally Posted by Kali
Can you tell more about the reliability/longevity for the MLC SSD ?
My data is precious (of course, I have several backups). But I want to be sure that all my data is safe on the long run, on an MLC SSD.
SSD and HDD aren't designed for the long-term if you mean > 10 years but by then you will probably have replaced your machine and drives a couple of times.
MLC and SLC have 10-100K write cycles per cell. MLC falls nearer the bottom of the range and SLC near the top. But, SSDs have wear-levelling so it doesn't just write to specific areas of the drive lots of times.
Intel rate their lifespan for the MLC drives at 30-60TB of 4k random writes. If you wrote 8GB per day of data in that fashion, your drive would last about 10-20 years and you probably won't. SLC is beneficial for servers because they run 24/7 so they can wear out quicker but the lifespan of the MLC drives is plenty now for desktop use, although the current generation only have 1/3rd of that lifespan so the G3 models and Crucial C300 are better.
It's not just the NAND itself that fails either but the controller, which you can't recover from. So as always, keep multiple regular backups. It's the only way to ensure your data is safe.