Blu-Ray is Faster than DVD
Blu-Ray Logo
I am really sick of all the Xbox fan boys out there (being that I am a Sony fan boy) saying that the Blu-Ray drive in the PS3 is slower than the DVD drive in the Xbox 360. As I will demonstrate below when used with DL (dual layer) DVDs (as the *vast* majority of Xbox 360 games are) the PS3’s Blu-Ray pulls more MB / sec than the competition.
Even these numbers give a little bit much to the 360’s drive because they don’t take into account the 100+ms seek times it takes to switch between DVD layers.
Blu-Ray Facts:
2x Blu-ray Drive (72Mbps(9MB/s))
Single Layer (2x CLV) – Constant Linear Velocity (Same speed across entire disk)
Entire Blu-ray Disk is read at 9MB/s.
DVD Facts:
12x DVD-Rom Drive
SL (9.25MB/S-15.85MB/s(AVG ~8x(10.57MB/s)
DL (4.36MB/s-10.57MB/s(AVG ~6x(7.93MB/s)
SL(DVD-5) 12x Max (5-12x Full CAV) – Constant Angular Velocity (Speed Varies from edge to edge)
DL(DVD-9) 8x Max (3.3-8x Full CAV) – Constant Angular Velocity (Speed Varies from edge to edge)
Conclusions:
SL DVD is 1.57MB/s > SL Blu-ray
DL DVD is 1.07MB/s < SL Blu-ray
Majority of 360 games are on DVD-9 (DL).
Sources:
Hitachi 12x DVD-Rom Faq (Page 2)
http://www.hitachi.us/supportingdocs…ead%20speed%22
What is DVD?
http://www.videohelp.com/dvd
Blu-ray.com Blu-ray FAQ
http://www.blu-ray.com/faq/
Wikipedia – Constant Linear Velocity
http://en.wikipedia.org/wiki/Constant_linear_velocity
Wikipedia – Constant Angular Velocity
http://en.wikipedia.org/wiki/Constant_angular_velocity
Recent Comments