Can one of the optical media experts out there confirm something for me?

The older CDs were marked as containing 650MB. The newer ones are 700MB. DVDs 
are 4.7GB.

>From what I see in K3B, the 700MB is 700*(1024)^2, or 734,003,200 bytes. In 
other words, the computer science interpretation of MB is used, as when you 
buy RAM. Actually, to be precise, K3B reports its has 703MB, which would be 
737148928 bytes. But there may be round off error in these values.

But for DVDs, it seems to be 4.7*(1000)^3, or 4,700,000,000 bytes. This is the 
engineering interpretation of GB, as when you buy hard disks. K3B reports 
this as 4.4GB.

I've searched Google, but all I find are references to the same MB/GB values 
with no explanation of which definition of these terms they're using.

Can someone confirm or correct my understanding?

Can anyone give me the exact byte count on each type of disk, or as close as 
possible to that? Or point me to where I can find them (other than buying 
copeis of the ISO standards)?

I need to know the maximum size of a tarball that will fit on a single disk.

Thanks,

-- 
Ron
ronhd at users dot sourceforge dot net

Opinions expressed here are all mine.
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