PS3 May Get 2X or Faster Blu-ray Drive

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The read speed of Blu-ray is something that drive manufacturer's specify, and it will vary from vendor to vendor. The only thing specified by the BD spec is what the "1X" speed is, which is 36Mbps in the case of Blu-ray Disc. We know that some of the first generation BD drives will be "2X" for Blu-ray Disc Data Reading which is 72Mbps.

http://ps3.ign.com/articles/638/638676p1.html

I guess "IGN are the best" comments will be back now. ;) :LOL:
 
IGN is certainly not the best.

For all their hullabahoo originally raised in 'outing' the blu-ray drive's transfer speed, this seems to me a sorry reversal. I think it's pretty safe to say that the drive will be at least 2x, and it's the conclusion reached in nearly any thread in which it's been discussed - here and in most other forums on the net.

The fact that they need reps from HP to write them in order for their hardware writers to get a clue just shows how bad they are. 9.6 GHz anyone? ;)
 
Let's end this once and for all.

BD-ROM White Paper
http://www.blu-raydisc.com/assets/d...physicalformatspecifications_jan05b-12909.pdf

Go to Page 6 for data transfer rate:
User data transfer rate: 53.948 Mbit/s (Movie application) (10.08 Mbps for DVD)
The BD system has the potential for future higher speed drives.
Click to expand...

End of discussion on this issue. IGN is wrong, and will continue to be wrong on this issue. The BD-FAQ is accurate b/c it uses info given from initial BD presentations, and thus from these white papers. 54Mbps. PEACE.

EDIT: 33.6Mbps is just for recorders. BD-RE is the primary format being trumpeted b/c not enough people have HDTVs IMO. So to make the format attractive in the short-term, it'll be pimped as a DVR format and high-capacity data backups.
 
Before people start going Xbox 360 DVD drive = teh slow the 10.08Mbps number is for a 1x drive. The X360 with its 16x drive would have a maximum transfer rate of ~160Mbps. DVD-ROMs usually perform half they're X rating though, I can't see BD-ROMs being any different.

I can see launch PS3 games using BD-ROMs to take advantage of the disc high density and placing all the data on the outer rim of the disc, so if the PS3 drive is 2x the average read speed will probably be higher.
 
jvd said:
it has a 12x drive not 16
Click to expand...


aye, this is true - and probably why people are hopeful of Sony sticking a x2 in PS3. don't forget of course that the lower Bluray speeds will only affect a small percentage of games, the rest will be like for like (X360 v PS3) on DVD
 
Quaz51 said:
54mb/s is for BD movie player and is 1.5x not 1x (the 1x reference is 36Mbps for every case)
Click to expand...
Interesting, but where do you see that? The 54Mbps comes from the BD-ROM white paper. It makes no distinction between 1x and 1.5x, or ROMs and movies. It just states the data transfer rate as 54Mbps. I guess the PS3 would use a 4x drive (or ~2.5x read) drive. If a 1x drive can spin up to transfer at 54Mbps, then shouldn't that be the established 1x rating? I can't see a BD-RE drive outside of PCs that couldn't read movies. Maybe we can label them like CAV drives, 1-1.5x. ;) PEACE.
 
MechanizedDeath said:
Interesting, but where do you see that?
Click to expand...

in the BD-ROM physical white paper...

Reference velocity (1X) 4.917 m/s
Click to expand...

Linear velocity: 7.367 m/s (Movie application)
User data transfer rate: 53.948 Mbit/s (Movie application)
Click to expand...

7.367 = 1.5 x 4.917
4.917 velocity = 36Mps data rate reference (x1)



page 11-12:

In BD-Movie applications a BD player rotates discs 1.5 times the reference linear velocity of the BD-ROM
Click to expand...


then a 54Mbs data rate is 1.5x not 1x
a BDx4 is 144Mbps (for every case, playing or writing)
 
Last edited by a moderator:
Strange... I happened to find this out myself today also -- nice find though Quaz51.

Looks like 36mbit/s is the actual speed for normal reading/writing -- seems IGN does have half a brain afterall.
 
Quaz51 said:
in the BD-ROM physical white paper...

7.367 = 1.5 x 4.917
4.917 velocity = 36Mps data rate reference (x1)

page 11-12:

then a 54Mbs data rate is 1.5x not 1x
a BDx4 is 144Mbps (for every case, playing or writing)
Click to expand...

Thanks for the clarification Quaz. Owndizzle! :LOL: I totally misread that as the angular velocity of when reading discs, with a slower angular velocity for writing. This makes more sense since it'll keep a reference. I guess we might be seeing more decimal drive speeds this gen, then? 4.7823232121x drives, here we come. ;) PEACE.
 
isn't 36mbps insufficient for HD movie playback on the fly?

So all they are saying is in order to facilitate movie playbackj the drives will require at least 1.5x reader, but they've cleverly set that up to appear as the actual transfer rate of 1x drives?

This is very interesting, so the actual transfer rate of BR is 36mbps @ 1x correct? The 54mbps is just spin? No pun intended lol

so this means that it would require a 3x BR drive to surpass the read speeds of a 12x dvd drive, and a 4x to surpass a 16x dvd player?

Also I've heard BR speeds are measured differently than DVD speeds, i.e. teh read speed on BR is constant, while the speeds on a DVD increase as the laser moves outwards, how does this affect the numbers?

AlsoFinally, what about seek times? This seems to be a very hard number to get information on, yet seems very important to overall load times. What are the seek times on the new BR drives compared to current DVD drives?
 
Last edited by a moderator:
Scooby: 54mbps is the video mode. A 1x drive will, apparently, play at 1.5x when playing a movie, it seems -- it's like a special mode or something, not really sure. That was what the PDFs seemed like they was saying. You'll never truly have a 1x drive on BR, unless it is purposely made to not play movies.

That was what I took out of reading all those stupid PDFs today.
 
no, 54mbps is teh transfer rate at 1.5x, which they chose to call "video mode"

but if we're trying to calculate transfer speeds for 2x or 4x, then 36mbps is the baseline 1x speed which we would multiply, not 54mbps.

That's what I'm getting...
 
then a 54Mbs data rate is 1.5x not 1x
Click to expand...
Considering that this is a baseline format spec, and thus a required compliance for any BDR drive, it's sort of a semanthics argument don't you think (for 1x drives anyway)?

The question now is whether this scaling will remain on higher speed drives or not.
 
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