sudo smartctl -a /dev/yourssd
You’re looking for the Media_Wearout_Indicator which is a percentage starting at 100% and going to 0%, with 0% being no more spare sectors available and thus “failed”. A very important note here, though, is that a 0% drive isn’t going to always result in data loss.
Unless you have the shittiest SSD I’ve ever heard of or seen, it’ll almost certainly just go read-only and all your data will be there, you just won’t be able to write more data to the drive.
Also you’ll probably be interested in the Total_LBAs_Written variable, which is (usually) going to be converted to gigabytes and will tell you how much data has been written to the drive.
