Does Blu-Ray use a fixed or variable spindle speed?



^^^ Topic

Would appreciate any links to specs, white papers, etc. that definitively state the case one way or the other.


Try looking here.



I saw those links on but didn’t find the answer.

I’m just wondering if the constant transfer rate is achieved by varying the spindle speed or by varying the bit density.


As in CD and DVD, the CLV (constant linear velocity) is achived by varying rotational velocity (RPM) as head moves from center toward the end of disc, or vise versa.

Is that what you’re asking?