Debian 7 amd64在VirtualBox 5.0.10上运行，在Windows 8.1上是x64主机。 这个虚拟机运行超过1年。 使用基本分区，而不是LVM或任何Raid。
今天它突然自动卸载所有的磁盘，并挂载/在只读模式，我强制重新启动在VirtualBoxpipe理器。 然后它不能再引导到系统：doge
GRUB loading. Welcome to GRUB! error: out of partition. Entering rescue mode... grub rescue> ls (hd0) (hd0,msdos5) (hd0,msdos1) grub rescue> ls (hd0,msdos1)/ ./ ../ lost+found/ var/ etc/ media/ vmlinuz sbin/ usr/ lib/ lib64/ selinux/ bin/ boot/ proc/ mnt/ tmp/ dev/ home/ root/ sys/ run/ srv/ opt/ initrd.img keybase/ lib32/ core grub rescue> ls (hd0,msdos1)/boot/ error: out of partition. grub rescue> ls (hd0)/ error: unknown filesystem grub rescue> ls (hd0,msdos5)/ error: unknown filesystem grub rescue> set root=(hd0,msdos1) grub rescue> set prefix=(hd0,msdos1)/boot/grub grub rescue> insmod normal error: out of partition. grub rescue> normal Unknow command 'normal' grub rescue> 我在Debian的救援模式下使用了debian-7.11.0-amd64-netinst.iso，但是在最后一步，它不能在任何分区挂载/目标，显示这个警告：
An error occurred while mounting the device you entered for your root file system (/dev/sda1) on /target Please check the syslog for more information.
/ var / log / syslog
rescue-mode: partitions found: /dev/sda1, /dev/sda2, /dev/sda5 rescue-mode: selected root device '/dev/sda1' rescue: umount: can't umount /target: Invalid argument kernel: EXT2-fs (sda1): error: couldn't mount because of unsupported optional features (244) kernel: EXT3-fs (sda1): error: couldn't mount because of unsupported optional features (240) kernel: EXT4-fs (sda1): ext4_check_descriptors: Block bitmap for group 128 not in group (block 811458560)! kernel: EXT4-fs (sda1): group descriptors corrupted! kernel: FAT-fs (sda1): utf8 is not a recommented IO charset for FAT filesystems, filesystem will be case sensitive! rescue: mount: mounting /dev/sda1 on /target failed: Invalid argument rescue-mode: mount '/dev/sda1' /target failed kernel: atkbd serio0: Spurious NAK on isa0060/serio0. Some program migh be trying access hardware directly. rescue-mode: partitions found: /dev/sda1, /dev/sda2, /dev/sda5 rescue-mode: selected root device '/dev/sda2' rescue: umount: can't umount /target: Invalid argument kernel: isofs_fill_super: bread failed, dev=sda2, iso_blknum=16, block=32 kernel: EXT2-fs (sda2): error: unable to read superblock kernel: EXT3-fs (sda2): error: unable to read superblock kernel: EXT4-fs (sda2): unable to read superblock kernel: REISERFS warning (device sda2): sh-2006 read_super_block: bread failed (dev sda2, block 8, size 1024) kernel: REISERFS warning (device sda2): sh-2006 read_super_block: bread failed (dev sda2, block 64, size 1024) kernel: FAT-fs (sda2): utf8 is not a recommented IO charset for FAT filesystems, filesystem will be case sensitive! rescue: mount: mounting /dev/sda2 on /target failed: Invalid argument rescue-mode: mount '/dev/sda2' /target failed rescue-mode: partitions found: /dev/sda1, /dev/sda2, /dev/sda5 rescue-mode: selected root device '/dev/sda5' rescue: umount: can't umount /target: Invalid argument kernel: FAT-fs (sda5): utf8 is not a recommented IO charset for FAT filesystems, filesystem will be case sensitive! rescue: mount: mounting /dev/sda5 on /target failed: Invalid argument rescue-mode: mount '/dev/sda5' /target failed
更新：2016-11-14
你是对的DerfK ，这是虚拟硬件腐败。
在Debian的救援模式下不装载任何分区，运行fsck.ext4 -ycf /dev/sda1修复它。