Vad innebär "Game appears to have random padding"?

Fick detta meddelande i ABGX360. Vad innebär det?

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Checking for updates to abgx360.dat...
Server file abgx360.dat no newer than local file - not retrieving

\Borderlands.2.LT+.v2.0\imars-bdl2-360-rf.dvd is valid

Checking Game
ISO: "\Borderlands.2.LT+.v2.0\imars-bdl2-360-rf.iso"
Size: 8738846720 bytes
Files in ISO: 1229, Folders in ISO: 10
Total bytes used: 6013345124 (69.42%)
Game appears to have random padding