To put it another way... ~80 TB written over 2,325 hours is a sustained average of ~10 MB/s - over the SSD's entire lifetime. This is high, but not impossible.
To give you a feel for it, my workstation only averages ~160 kB/s over a 24 hour period.
Cherry picking a particularly write-intensive day still only lands me at an average of ~870 kB/s over a 24 hour period (71.5 GB written).
It's not impossible to see the 80 TB figure you've quoted, but I'd be suspicious that either:
- Something is misreporting ("powered on hours" or "bytes written" - SMART isn't perfect)
- The previous owner used it heavily from a storage point of view
To give further credence to the "something is misreporting" hypothesis, the "Total LBAs Written" (
0xF1) value of
79,978 implies an absolute maximum of ~312 MB (if we assume 4096 byte sectors)... The value is stored as 48-bit, so even 80 TB wouldn't have caused it to wrap. But, as mentioned above, SMART isn't perfect, and it certainly isn't implemented the same from manufacturer to manufacturer.
0xF9 ("Total NAND Writes. Raw value reports the number of writes to NAND in 1 GB increments.") however suggests ~609 GB written over the SSD's lifetime, which is quite a reasonable figure.
Even if the 80 TB figure is accurate, modern SSDs are expected to last significantly longer than people originally anticipated... This SSD range was announced in Jan 2018. A rough estimate is "a few thousand times the capacity", or ~750 TB in your case.
The datasheet's claimed "Endurance" of 100 TBW is more likely to be related to conservative reliability and warranty than a prediction of "it will fail as soon as it passes 100 TBW".