謝謝大家!!
測試成功了!! 總結一下
拿到新的 BD-RE 要記得先拿 ImgBurn 低階格式化一下才能使用到最大的容量.
ImgBurn 預設就是 Perfer Format without Spare Areas, 所以直接 Erase Full 即可 .
完成後記得退片, 再重新讀取即可.


網路上看到這篇, 應該算是解答了.
做完之後, 還要退片再重讀一次.

Once you have the media, you want to do a low-level format. To do this, run ImgBurn, and open up
Tools > Settings > Write. Check the box next to "Prefer Format Without Spare Areas." This sets
ImgBurn to format without a SSA if possible. Then do a full erase. (It calls it a full erase, but
it's actually sending the FORMAT UNIT command to the drive.) After you do this, eject and re-insert
the disc so that Vista recognizes the extra space.

= ImgBurn Disc Info (factory formatted) =

Preferred Format Capacity:
Sectors: 2,236,704
Size: 4,580,769,792 bytes
Time: 497:04:54 (MM:SS:FF)

Maximum Format Capacity:
Sectors: 2,295,072
Size: 4,700,307,456 bytes
Time: 510:02:72 (MM:SS:FF)