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cd-r

### #1 Thil Posted 27 February 2015 - 01:33 AM

Thil

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I have come across this text regarding the value of x speed of CD-R:

"Speed Rating: The speed rating of a CD-R is the amount data that can be written

to it within a unit period of time. The speeds are usually indicated in a value which
is a multiple of 1.2Mb. If the data writing speed is 1.2Mb then it has a 1x writing

speed, if it is 59.5093MiB it has a 52x writing speed."

It says 1x is 1.2MB, but when I searched for it, everywhere it says 1x is 150kbps.

So is this text wrong?

Also, how do you calculate maximum data written per second when the writer and CD-R have different speeds?

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### #2 Fusionbomb Posted 27 February 2015 - 08:47 AM

Fusionbomb

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Hello Thil... and

The text is correct.  I think you're confused about the labeling of the speed(s).  If you see a "b", that stands for "bit".  If you see a "B", that stands for "Byte".

1kbps   !=   1kBps

As far as the maximum data written per second, this is what is known as a "bottleneck".  A bottleneck occurs when there are differing speeds, but the input/output speed (of anything) is always going to be the slowest variable in the equation.

I hope I am clear in my explanation.  Good luck!

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### #3 Thil Posted 27 February 2015 - 12:22 PM

Thil

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Hey, thanks so much...

Yeah I didn't think about that,

I looked through the conversion charts.

1x = 1.2 Mbps=150 kBps, right?

Thanks for clearing it up.

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Fusionbomb

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Correct.

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