Hello,

Our study of spinning disk (e.g. HDD) lead us to heuristic that power consumption is cube of rotational speed. So that lower rotational speed grants more efficient power consumption for the same amount of data I/O.

However for optical device, we have no comparative data between the laser lens power consumption at different speeds and the disc motor power consumption at different speeds, or the overhead power consumption of rotation speed change from non-CAV speed controls (CLV, ZCLV, PCAV).

If you have such data and may share it with Microsoft for the sake of the speed control Mt Fuji/MMC proposal, we would appreciate your help.

Best regards,

David Burg.