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Old 04-08-2006, 07:13 PM   #1
imgod22222 imgod22222 is offline
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Apr 2006
Default Blu-ray speed

I've seen how things like the dual layer are going to be 50GB worth of data, right? So, let's say I were to buy the first blu-ray drive on the market. How long would it take to burn 50GB of data onto the disc? How much RPM will these drives have? How many kbps or mbps will 1x be, and what will be the fastest speed? Why don't they just make a blu-ray drive that can fit like 3 discs in it at a time and use that like a hard drive? Since they'll be making multiple layers the storage on one disc could be nearly infinite! and just keep the discs like platters that can be removed and never fragmented? This just got me wondering... Are they going to make like BD-RAMs or BD-RWs? And what would the interface be for these drives? SATAII sounds like it would be best, since it's the fastest and will eventually become outdated. Because IDE has always been a pain since the connectors on the mobo and drive are so ridiculously big compared to SATA. Even though people are slowly trying to buy things to fill up their PCIE slots, i don't think it would be a good interface for a disk drive since there will be an annoying wire from the back of the computer to the front inside the case reducing airflow.
...
Sorry, i think i've been ranting on and on. I'll stop now. Please answer above questions, someone.
 
Old 04-08-2006, 09:29 PM   #2
Marwin Marwin is offline
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According to the Blu-ray Disc specification 1x speed is defined as 36Mbps (4.5MB/s) and the first-generation drives that have been announced so far support 2x read/write speed. At 2x speed it should take about 1 hour and 30 minutes to burn 50GB. From what I've read there should be 4x drives on the market in 2007, which should cut the time in half. If we assume that the upper limit for disc rotation speed is 10,000 RPM then 12x speed at the outer diameter should be possible in the future. When it comes to adding more layers, it will take some time for them to get media with more layers ready for mass-production, but they are working on 4 layers (100GB) for 2007. Finally, re-writeable discs are now called BD-RE for re-recordable.
 
Old 04-08-2006, 10:13 PM   #3
Marwin Marwin is offline
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When it comes to IDE vs SATA it's up to each manufacturer to choose what they want to use. The following is a summary of what I've read about the first-generation drives so far:

BenQ BW1000 (SATA)
LG GBW-H10N (?)
Panasonic SW-5582 (IDE)
Philips SPD7000 (SATA)
Pioneer BDR-101A (IDE)
Samsung SH-B022 (IDE)
Sony BWU-100A (?)

Please note that this information is subject to change before the release of the drives.
 
Old 04-09-2006, 11:21 AM   #4
imgod22222 imgod22222 is offline
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Dang! Is my question so confusing that only an admin can answer? O.O
You're making it sould like mid to late 2007 is THE TIME to get everything BD. But if things like BD can bump the speed from 2x speed when it first comes out soon to 12x, do you think we'd be able to expect an increase on the speed of DVD burning? Also, much like DVD DL burning, which burns at 6x (i think) compared to single-layer DVDs burning at 12x (i think). Wouldn't single layer then take 30min, dual 160, tri(if they make it) more, and quad an insane amount of time; not only because of all the more data to burn to disc, but also because multilayered burning is slower?
And now, even if this is talk about just media: what's the beams thickness for each generation of disk?
CD = something microns i think
DVD = Some less microns i think
HD DVD= Same as BD i think
BD= same as HD DVD i think

Also, i think i'm brain-dead this morning.mbps = megabits per second and mb/s = megabytes per second?
*grumbles* i thought they were interchangeable until now.
-end anger-
 
Old 04-09-2006, 12:03 PM   #5
Marwin Marwin is offline
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I think the others just prefer discussing movies and players instead of technical facts about the format

I have no idea if when they add more layers the speed will lag behind single-layer/dual-layer, but at least single-layer and dual-layer seem to be at the same speed to begin with which is promising. I think 4x speed should be easier to fix than qual-layers, so you will probably see that in the second-generation drives whenever they are launched (early 2007?).

The track pitch in microns for the formats are:
CD = 1.6µm
DVD = 0.74µm
HD-DVD = 0.40µm
Blu-ray = 0.32µm

Please note the difference in case of the letter "B" as it denotes either bits or bytes, this is how the units relate:
Mbps = Mb/s = megabits / second
MBps = MB/s = megabytes / second
8Mbps = 1MB/s (8 bits in a byte)

Last edited by Marwin; 04-09-2006 at 12:07 PM.
 
Old 04-09-2006, 02:38 PM   #6
imgod22222 imgod22222 is offline
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And if I can properly recall
the fastest speed you can READ data off a DVD is 9MB/s.
Now talking about reading speed for BDs, exactly how fast can I expect that to be?
I mean... we HAVE been talking about burning speeds this whole time... Riiiiight?
 
Old 04-11-2006, 08:01 PM   #7
zombie zombie is offline
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Closed as requested by thread originator.
 
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