very big files on cd9660 file system

Dag-Erling Smørgrav des at
Thu Aug 25 12:23:54 GMT 2005

Bruce Evans <bde at> writes:
> Mostly (b).  Sizes are 64 bits in the standard, but FreeBSD has always
> silently discarded the highest 32 bits and corrupted the next highest
> bit to a sign bit, so the file size limit is at most 2GB or 4GB
> (depending on whether the sign bit gets corrupted back to a value bit).

ISO9660 does not use 64-bit values.  Those 8-byte values you see in
the headers are 32-bit values stored first in little-endian format and
second in big-endian format.

Dag-Erling Smørgrav - des at

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