安装期间无法识别现有分区

我的电脑上安装了Windows 8（最终版本，没有预览版）。 现在我想安装Ubuntu，就像我之前做过一千次一样。 奇怪的是， gparted （从现场USB-Stick开始）看到我的系统磁盘完全未分配，尽管它有一个巨大的ntfs分区，其上有Windows 8。 所以我再次启动Windows并使用磁盘管理工具缩小该分区并在可用空间中创建一个新分区。 我把那个编成了fat32。 我在gparted仍然有相同的行为。 有没有人有想法？ 我的硬盘是三星830系列SSD，主板有UEFI。

编辑

现在尝试了12.10 beta1棒。 它告诉我该卷包含GPT签名，并且可能被不理解的程序损坏。 有了这些新信息，我发现了这个，但我不确定该怎么做。

Answer 1

我在这里找到了解决方案。 基本部分是：

 OK, then, it looks like you've got a new MBR with residual GPT data, which is confusing GParted. You'll have to wipe the GPT data. Here's how: Boot your PartedMagic or System Rescue CD emergency disc. For safety, back up your MBR by typing "dd if=/dev/sda of=sda-backup.mbr bs=512 count=1" and then copying the resulting file (sda-backup.mbr) to a USB flash drive, network share, or some other medium. Be sure to get the if= and of= parameters right, though! Launch gdisk by typing "gdisk /dev/sda". When asked whether to use the MBR or GPT data, either will work. Type "x" to enter the experts' menu. The command prompt should change. Type "z" to "zap" (destroy) the GPT data. Tell it to proceed, but answer "N" to the question about blanking the MBR. That's it. Windows should boot as it did before and you should now be able to continue your installation of Ubuntu; its installer should now see the same partitions as Windows.