Blu Ray Speeds

Linden · **Joined:** Tue Sep 09, 2008 9:53 am **Posts:** 23

SB_CdvdBurnerGrabber_GetSpeeds reports my 215.79 Mbit/s (6x Max) Read (2x Max) Write as 21579 Read 7056 Write (for a DL ROM-4.8Max) which appears to be out by a factor of 10.

Dividing by the speed factor in starburn.pas of 4495 the x values are correct ie 4.8Read - on a 2x BD-RE GetSpeed returns 8992

the

Starburn.pas wrote:

BLURAY_SPEED_IN_KBPS_1X = 4495; // Actually 4495.5

also appears to conflict with

http://www.blu-ray.com/faq/ wrote:

According to the Blu-ray Disc specification, 1x speed is defined as 36Mbps.

So to display Mb/s do I need to use GetSpeed then divide by BLURAY_SPEED_IN_KBPS_1X and multiply by 36

Any comments

Linden

anton (staff) · **Posted:** Tue Sep 30, 2008 6:59 am

Don't mix MEGABITS and MEGABYTES. They are quite different things. 36 megabits / 8 ~= 4.5 megabytes. So everything is correct.

Linden · **Joined:** Tue Sep 09, 2008 9:53 am **Posts:** 23

Ouch

... you'd think after 30 years of coding I be a bit smarter :roll:

BTW ... another bug for me - SetSpeed fails on BD devices is this also a known issue

Linden

anton (staff) · **Posted:** Tue Sep 30, 2008 8:09 am

Should not! Please send us the log.

Linden · **Joined:** Tue Sep 09, 2008 9:53 am **Posts:** 23

Linden wrote:

SetSpeed fails on BD devices

Appears to be only an issue with "out-of-the-box" media once formatted (quick) setspeed is fine. I'm waiting on more fresh media to do more testing but have sent you the logs for before and after format

Linden

anton (staff) · **Posted:** Wed Oct 01, 2008 6:52 am

This one is known one.

Linden wrote:

SetSpeed fails on BD devices

Appears to be only an issue with "out-of-the-box" media once formatted (quick) setspeed is fine. I'm waiting on more fresh media to do more testing but have sent you the logs for before and after format

Linden

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