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发现双启动时 MBR 签名无效

tag-icon • tag-icon dual-boot grub2 windows-7 bootloader boot-repair
发现双启动时 MBR 签名无效

我的双启动笔记本电脑（Ubuntu 16.04 和 Windows 7）突然停止启动。 GRUB 菜单没有显示。 我尝试了实用程序启动修复，它甚至没有在小弹出窗口中显示“推荐修复”。

BootInfo 摘要已上传至：https://paste2.org/I7XU5F19

我尝试修复（或恢复数据）的硬盘是/dev/sda三星 SSD 840。

摘要：

Drive: sda 
Disk /dev/sda: 465.8 GiB, 500107862016 bytes, 976773168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Partition  Boot  Start Sector    End Sector  # of Sectors  Id System

Invalid MBR Signature found.

======================== Unknown MBRs/Boot Sectors/etc: ========================
Unknown MBR on /dev/sda

00000000  49 00 01 00 00 00 00 00  00 00 00 00 00 00 00 00  |I...............|
00000010  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000020  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000030  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
...

我知道该怎么做才能修复它或者恢复数据吗？

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