我的笔记本电脑上安装了 Windows7 和 Ubuntu 14.04。
Windows 需要更新，但更新失败并出现错误。
我的笔记本电脑有一个恢复出厂设置选项，我试过了。这也出了问题。现在我启动时会收到“没有这样的分区 grub rescue”信息。
下面是 bootinfoscript 的输出（我理解它将显示所有需要的信息来帮助我解决问题）
注意：我已从 USB 密钥启动。提前感谢您提供的任何帮助/建议。
Boot Info Script 0.61 [1 April 2012]
============================= Boot Info Summary: ===============================
=> Grub2 (v1.99) is installed in the MBR of /dev/sda and looks at sector 1 of
the same hard drive for core.img. core.img is at this location and looks
in partition 112 for .
=> Syslinux MBR (4.04 and higher) is installed in the MBR of /dev/sdb.
sda1: __________________________________________________________________________
File system: ntfs
Boot sector type: Windows Vista/7: NTFS
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files: /bootmgr /Boot/BCD
sda2: __________________________________________________________________________
File system: ntfs
Boot sector type: Windows Vista/7: NTFS
Boot sector info: No errors found in the Boot Parameter Block.
Operating System: Windows 7
Boot files: /Windows/System32/winload.exe
sda3: __________________________________________________________________________
File system: ntfs
Boot sector type: Windows Vista/7: NTFS
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files:
sda4: __________________________________________________________________________
File system: Extended Partition
Boot sector type: -
Boot sector info:
sda5: __________________________________________________________________________
File system:
Boot sector type: -
Boot sector info:
Mounting failed: mount: unknown filesystem type ''
sdb1: __________________________________________________________________________
File system: vfat
Boot sector type: SYSLINUX 4.05 20140113
Boot sector info: Syslinux looks at sector 511 of /dev/sdb1 for its
second stage. SYSLINUX is installed in the directory.
The integrity check of the ADV area failed. No errors
found in the Boot Parameter Block.
Operating System:
Boot files: /boot/grub/grub.cfg /syslinux/syslinux.cfg
/efi/BOOT/grubx64.efi /ldlinux.sys
============================ Drive/Partition Info: =============================
Drive: sda _____________________________________________________________________
Disk /dev/sda: 320.1 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders, total 625142448 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
Partition Boot Start Sector End Sector # of Sectors Id System
/dev/sda1 * 2,048 821,247 819,200 27 Hidden NTFS (Recovery Environment)
/dev/sda2 821,248 62,261,247 61,440,000 7 NTFS / exFAT / HPFS
/dev/sda3 62,261,248 82,741,247 20,480,000 7 NTFS / exFAT / HPFS
/dev/sda4 82,743,294 625,141,759 542,398,466 5 Extended
/dev/sda5 609,517,568 625,141,759 15,624,192 82 Linux swap / Solaris
Drive: sdb _____________________________________________________________________
Disk /dev/sdb: 2000 MB, 2000683008 bytes
64 heads, 47 sectors/track, 1299 cylinders, total 3907584 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
Partition Boot Start Sector End Sector # of Sectors Id System
/dev/sdb1 * 3,616 3,907,583 3,903,968 6 FAT16
"blkid" output: ________________________________________________________________
Device UUID TYPE LABEL
/dev/loop0 squashfs
/dev/sda1 EAC60D4BC60D1989 ntfs SYSTEM
/dev/sda2 CE1810AF18109893 ntfs WINDOWS
/dev/sda3 38EE9AC7EE9A7D36 ntfs Data
/dev/sdb1 30EE-D219 vfat
================================ Mount points: =================================
Device Mount_Point Type Options
/dev/loop0 /rofs squashfs (ro,noatime)
/dev/sdb1 /cdrom vfat (ro,noatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro)
=========================== sdb1/boot/grub/grub.cfg: ===========================
--------------------------------------------------------------------------------
if loadfont /boot/grub/font.pf2 ; then
set gfxmode=auto
insmod efi_gop
insmod efi_uga
insmod gfxterm
terminal_output gfxterm
fi
set menu_color_normal=white/black
set menu_color_highlight=black/light-gray
menuentry "Try Ubuntu without installing" {
set gfxpayload=keep
linux /casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash --
initrd /casper/initrd.lz
}
menuentry "Install Ubuntu" {
set gfxpayload=keep
linux /casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity quiet splash --
initrd /casper/initrd.lz
}
menuentry "OEM install (for manufacturers)" {
set gfxpayload=keep
linux /casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity quiet splash oem-config/enable=true --
initrd /casper/initrd.lz
}
menuentry "Check disc for defects" {
set gfxpayload=keep
linux /casper/vmlinuz.efi boot=casper integrity-check quiet splash --
initrd /casper/initrd.lz
}
--------------------------------------------------------------------------------
========================= sdb1/syslinux/syslinux.cfg: ==========================
--------------------------------------------------------------------------------
# D-I config version 2.0
include menu.cfg
default vesamenu.c32
prompt 0
timeout 50
ui gfxboot bootlogo
--------------------------------------------------------------------------------
=================== sdb1: Location of files loaded by Grub: ====================
GiB - GB File Fragment(s)
================= sdb1: Location of files loaded by Syslinux: ==================
GiB - GB File Fragment(s)
============== sdb1: Version of COM32(R) files used by Syslinux: ===============
syslinux/chain.c32 : COM32R module (v4.xx)
syslinux/gfxboot.c32 : COM32R module (v4.xx)
syslinux/vesamenu.c32 : COM32R module (v4.xx)
=============================== StdErr Messages: ===============================
./bootinfoscript: line 1646: [: 2.73495e+09: integer expression expected
cat: /tmp/BootInfo-BPZQv9Hh/Tmp_Log: No such file or directory
cat: /tmp/BootInfo-BPZQv9Hh/Tmp_Log: No such file or directory
No volume groups found
答案1
有一行表明包含 Linux 的分区可能存在问题：
Mounting failed: mount: unknown filesystem type ''
您可以尝试手动挂载它，然后重新安装 GRUB。如果/dev/sda5 真的是您的 Linux 根分区（或者如果您有一个/boot分区，请使用它），从实时介质中打开终端并尝试以下操作*：
sudo mount /dev/sda5 /mnt
sudo grub-install --boot-directory=/mnt/boot /dev/sda
现在重新启动后，您应该可以毫无问题地使用 Ubuntu。如果您发现由于没有启动菜单而无法启动 Windows，请从启动的 Ubuntu 中运行终端
sudo update-grub
这将检测 Windows 引导加载程序并将相应的条目添加到 GRUB 启动菜单。
- 如果分区无法挂载，则可能是您以某种方式损坏了它，可能需要重新安装 Linux。