Considering that after 460GB you were limited to a speed of about 0.5TB/day, I would assume that for your model, the limit might be to 0.5TB/day of usage. Could you let it run a few days more at this speed? If this would be the worst throttling scenario, this would still allow at least 14K cycles with uncompressible data. Or maybe around 5K cycles with data that compresses to around 35%.