It's rated to handle 10 DWPD (drive writes per day) - meaning that one could write 8,000 gigabytes of data a day, 365 days a year, for 5 years (~17 petabytes), and the drive will still be chugging away just fine.
It actually means something more like "we don't feel confident that the drive will last more than 5 years at 8TB/day." --- and if you do the maths, assuming perfectly even wear, this means they're rating the flash at ~20K cycles/cell, which sounds a bit ambitious for 20nm MLC considering that ~10K cycles was the norm for 65nm MLC several years ago.
1TB Samsung 850 Pro (which has some of best endurance of consumer ssds), on the other hand is only rated to 300 terabytes of data written.
That totals around 300 cycles/cell, which seems like 3-bit/cell ("TLC") flash to me, or cheap small-process MLC.
It actually means something more like "we don't feel confident that the drive will last more than 5 years at 8TB/day." --- and if you do the maths, assuming perfectly even wear, this means they're rating the flash at ~20K cycles/cell, which sounds a bit ambitious for 20nm MLC considering that ~10K cycles was the norm for 65nm MLC several years ago.
1TB Samsung 850 Pro (which has some of best endurance of consumer ssds), on the other hand is only rated to 300 terabytes of data written.
That totals around 300 cycles/cell, which seems like 3-bit/cell ("TLC") flash to me, or cheap small-process MLC.