CDROM_BLK_2324
blk_size = CDROM_BLK_2324;
((blksz) == CDROM_BLK_2336) || ((blksz) == CDROM_BLK_2324))
((blksz) == CDROM_BLK_2336) || ((blksz) == CDROM_BLK_2324) || \