On Mon, 24 Apr 2000, Kenneth E. Lussier wrote:
> A friend of mine asked me to make a copy of a CD for him because the one
> that he has is fairly old, it has some scratches on it, and it's his
> favorite game.
Right. Suuuure. ;-)
> The CD is being reported as 692MB.
While a "standard" CD-ROM is limited to 650 MB, there are "extended play"
CDs which push the limits somewhat to get an extra 50 MB or so. They don't
work with some CD readers, and many CD recorders cannot write them (thus,
sometimes this is used as a rather pathetic attempt at copy protection). I
think the Windoze Warez d00d world calls the recorders that can write these
extra-long CDs "overburn" drives.
> As if that wasn't weird enough, there are files on the CD itself that are
> being reported (under Windows) as being 1.05GB and 3.57GB.
I don't really know if ISO-9660 (or any of its extensions) support this, but
those sound like sparse files: Files filled with large blocks of zeros, which
are optimized out by simply recording "large block of zeros here" rather then
the actual zeros. (This is more a theory then an explanation.)
> Under Linux, all of the file sizes look normal, and the ISO image that I
> ripped is only 186MB.
Maybe it is a multi-session disk?
Have you tried running "isoinfo" or any other diagnostic tools against this
CD?
--
Ben Scott <[EMAIL PROTECTED]>
Net Technologies, Inc. <http://www.ntisys.com>
Voice: (800)905-3049 x18 Fax: (978)499-7839
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