700/703 MB CD size

Paul Sladen ubuntu at paul.sladen.org
Sat Jan 24 15:25:56 GMT 2009

On Sat, 24 Jan 2009, Jani Monoses wrote:
> The current Ubuntu CD image size limit is 700

It is, as you note (80*60*75*2048 bytes), hopefully plus lead-in and
lead-out sector allowances and often with a tiny little bit extra (see

Where is the comparision being done, is it the number of bytes in the
resulting ISO (eg. inclusive of meta-data), or the number of bytes of the
packages, in the hope that the final result (metadata added) will fit?

One advantage of producing an exactly size .iso might be that people would
not try to burn it by dragging it *as a file* (rather than image) onto a
CD-R; the software would complain earlier it wouldn't fit.

If you're *really* tight of space, there's about half-a-megabyte (N files *
~1024) of it spare at the end of unfilled sectors (less on the desktop CD).

Why do one side of a triangle when you can do all three.  Somewhere, GB.

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