Tom Horsley <horsley1953 <at> gmail.com> writes:
So, does anyone have any pointers to information on the
actual capacity of BD-R disks? None of the tools on fedora
seem to agree, and none of them appear to be correct
either . (And web searches are remarkably fruitless
on this topic).
Is BD-R back to the days where you have to do a simulated
write before you can get an actual answer? Or is it simpler
just to provide about 3GB of slop to be sure everything fits?
The capacity of all optical media with the exception of CDs are measured using
SI units (see
https://en.wikipedia.org/wiki/Binary_prefixes#Optical_discs ), so
if the container says "25 GB", that means 25*1000^3 bytes (NOT 25*1024^3). The
capacity of a "700 MB" CD is actually 700 MiB = 700*1024^2 bytes. You should
check whether when k3b says "GB", it really means that (1000^3 bytes), or if
it's actually referring to GiB (1024^3 bytes).