Its a very strange situation really, Mitsumi 4804 will read RAW + 96 & does perfect backups of SecuRom/*new*/V2, but Lite-On 24102B also reads RAW + 96 & won't do perfect backups of SecuRom/*new*/V2 .....
As far as I know, Diablo 2 is SecuRom V2 or *new*, I have this & might try to do a backup using the Lite-On to a cdrw disc & see what happens. But then, its very possible they have updated SecuRom since Diablo 2 ....