我有 Windows 8，然后我尝试安装 Ubuntu14.04。安装成功完成，但启动失败并且我得到了 initramfs 提示。我决定再次安装 ubuntu，但现在我的安装失败并出现致命错误。执行“grub-install /dev/sda”失败。我尝试安装启动恢复等，但似乎没有任何效果。
更新：我尝试了启动修复，但它没有修复我的 grub，但它生成了一个报告。这是链接：
http://paste.ubuntu.com/15099645/
更新：我尝试使用该命令fsck -y /dev/sda并给出以下输出：
fsck from util-linux 2.20.1 e2fsck 1.42.9 (4-Feb-2014) ext2fs_open2: Bad magic number in super-block fsck.ext2: Superblock invalid, trying backup blocks... fsck.ext2: Bad magic number in super-block while trying to open /dev/sda The superblock could not be read or does not describe a valid ext2/ext3/ext4 filesystem. If the device is valid and it really contains an ext2/ext3/ext4 filesystem (and not swap or ufs or something else), then the superblock is corrupt, and you might try running e2fsck with an alternate superblock: e2fsck -b 8193 <device> or e2fsck -b 32768 <device>