I'm sorry, I didn't mean you'd calculate some value once for all the drives. It's definitely something you measure over the lifespan of the SSD itself with the

I'm sorry, I didn't mean you'd calculate some value once for all the drives. It's definitely something you measure over the lifespan of the SSD itself with the rest of your QoS subsystem. Reads, program/erases, controller ecc/ read disturb management, the g/p list mapping of the blocks... This all has to be taken into account in a dynamic way. And yes, some people are doing this at a higher level than the SSD controller.