我在 win10 的 vmware 虚拟机里安装的 opensuse-leap-15.1, 在更新 opensuse-leap-15.1 软件包的过程中 win10 蓝屏了, 重启后发现进入虚拟机是 GRUB Loading 界面
我尝试引导启动发现 file ‘/’ not found 错误
grub rescue> set root=(hd0,2)
grub rescue> set prefix=(hd0,2)/boot/grub
grub rescue> insmod normal
error: file '/' not found.
然后我进入 iso 的救援模式尝试修复文件系统
但是没有成功.
我应该如何处理?
在 iso 的救援模式中没有 btrfs-find-root 命令
去这里下 btrfsprogs-static 然后放到 U 盘里用
https://download.opensuse.org/repositories/filesystems/openSUSE_Tumbleweed/x86_64/
btrfs-find-root 的输出结果为:
tty1:rescue:~ # btrfs-find-root /dev/sda2
Superblock thinks the generation is 56680
Superblock thinks the level is 1
Well block 225181696 (gen: 56681 level: 1) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 214040576 (gen: 56680 level: 0) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 213942272 (gen: 56680 level: 0) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 226394112 (gen: 56660 level: 1) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 79822848 (gen: 56654 level: 1) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 23129915392 (gen: 56653 level: 1) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 23082401792 (gen: 56336 level: 1) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 22903619584 (gen: 56260 level: 1) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 22844997632 (gen: 56259 level: 1) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 22859546624 (gen: 56258 level: 1) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 411140096 (gen: 56252 level: 1) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 400850944 (gen: 56251 level: 0) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 815202304 (gen: 56250 level: 1) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 777240576 (gen: 56235 level: 1) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 776798208 (gen: 56234 level: 1) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 774209536 (gen: 56228 level: 1) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 773586944 (gen: 56227 level: 1) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 773341184 (gen: 56226 level: 1) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 750632960 (gen: 56180 level: 1) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 750321664 (gen: 56179 level: 1) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 749928448 (gen: 56178 level: 1) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 749568000 (gen: 56177 level: 1) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 748797952 (gen: 56175 level: 1) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 748306432 (gen: 56174 level: 1) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 739393536 (gen: 56155 level: 1) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 739508224 (gen: 56154 level: 1) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 734969856 (gen: 56144 level: 1) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 734347264 (gen: 56143 level: 1) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 724140032 (gen: 56121 level: 1) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 715456512 (gen: 56103 level: 1) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 712687616 (gen: 56098 level: 1) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 712474624 (gen: 56097 level: 1) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 711720960 (gen: 56095 level: 1) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 702005248 (gen: 56074 level: 1) seems good, but generation/level doesn't match, want gen: 56680 level: 1
Well block 699465728 (gen: 56073 level: 1) seems good, but generation/level doesn't match, want gen: 56680 level: 1
......
我提取其中的 gen 值生成三个脚本
super0.sh:
btrfs check --tree-root 56681 --super 0 /dev/sda2 || \
btrfs check --tree-root 56680 --super 0 /dev/sda2 || \
btrfs check --tree-root 56680 --super 0 /dev/sda2 || \
btrfs check --tree-root 56660 --super 0 /dev/sda2 || \
btrfs check --tree-root 56654 --super 0 /dev/sda2 || \
btrfs check --tree-root 56653 --super 0 /dev/sda2 || \
btrfs check --tree-root 56336 --super 0 /dev/sda2 || \
btrfs check --tree-root 56260 --super 0 /dev/sda2 || \
btrfs check --tree-root 56259 --super 0 /dev/sda2 || \
btrfs check --tree-root 56258 --super 0 /dev/sda2 || \
......
super1.sh:
btrfs check --tree-root 56681 --super 1 /dev/sda2 || \
btrfs check --tree-root 56680 --super 1 /dev/sda2 || \
btrfs check --tree-root 56680 --super 1 /dev/sda2 || \
btrfs check --tree-root 56660 --super 1 /dev/sda2 || \
btrfs check --tree-root 56654 --super 1 /dev/sda2 || \
btrfs check --tree-root 56653 --super 1 /dev/sda2 || \
btrfs check --tree-root 56336 --super 1 /dev/sda2 || \
btrfs check --tree-root 56260 --super 1 /dev/sda2 || \
btrfs check --tree-root 56259 --super 1 /dev/sda2 || \
btrfs check --tree-root 56258 --super 1 /dev/sda2 || \
......
super2.sh:
btrfs check --tree-root 56681 --super 2 /dev/sda2 || \
btrfs check --tree-root 56680 --super 2 /dev/sda2 || \
btrfs check --tree-root 56680 --super 2 /dev/sda2 || \
btrfs check --tree-root 56660 --super 2 /dev/sda2 || \
btrfs check --tree-root 56654 --super 2 /dev/sda2 || \
btrfs check --tree-root 56653 --super 2 /dev/sda2 || \
btrfs check --tree-root 56336 --super 2 /dev/sda2 || \
btrfs check --tree-root 56260 --super 2 /dev/sda2 || \
btrfs check --tree-root 56259 --super 2 /dev/sda2 || \
btrfs check --tree-root 56258 --super 2 /dev/sda2 || \
......
super0.sh 执行的结果为 return0.txt:
ERROR: tree block bytenr 56681 is not aligned to sectorsize 4096
Couldn't read tree root
ERROR: cannot open file system
using SB copy 0, bytenr 65536
Opening filesystem to check...
ERROR: tree block bytenr 56680 is not aligned to sectorsize 4096
Couldn't read tree root
ERROR: cannot open file system
using SB copy 0, bytenr 65536
Opening filesystem to check...
ERROR: tree block bytenr 56680 is not aligned to sectorsize 4096
Couldn't read tree root
ERROR: cannot open file system
using SB copy 0, bytenr 65536
Opening filesystem to check...
ERROR: tree block bytenr 56660 is not aligned to sectorsize 4096
Couldn't read tree root
ERROR: cannot open file system
using SB copy 0, bytenr 65536
Opening filesystem to check...
ERROR: tree block bytenr 56654 is not aligned to sectorsize 4096
Couldn't read tree root
ERROR: cannot open file system
using SB copy 0, bytenr 65536
Opening filesystem to check...
ERROR: tree block bytenr 56653 is not aligned to sectorsize 4096
Couldn't read tree root
ERROR: cannot open file system
......
super1.sh 执行的结果为 return1.txt:
ERROR: tree block bytenr 56681 is not aligned to sectorsize 4096
Couldn't read tree root
ERROR: cannot open file system
using SB copy 1, bytenr 67108864
Opening filesystem to check...
ERROR: tree block bytenr 56680 is not aligned to sectorsize 4096
Couldn't read tree root
ERROR: cannot open file system
using SB copy 1, bytenr 67108864
Opening filesystem to check...
ERROR: tree block bytenr 56680 is not aligned to sectorsize 4096
Couldn't read tree root
ERROR: cannot open file system
using SB copy 1, bytenr 67108864
Opening filesystem to check...
ERROR: tree block bytenr 56660 is not aligned to sectorsize 4096
Couldn't read tree root
ERROR: cannot open file system
using SB copy 1, bytenr 67108864
Opening filesystem to check...
ERROR: tree block bytenr 56654 is not aligned to sectorsize 4096
Couldn't read tree root
ERROR: cannot open file system
using SB copy 1, bytenr 67108864
Opening filesystem to check...
ERROR: tree block bytenr 56653 is not aligned to sectorsize 4096
Couldn't read tree root
ERROR: cannot open file system
......
super2.sh 执行的结果为 return2.txt:
ERROR: superblock bytenr 274877906944 is larger than device size 30054285312
ERROR: cannot open file system
using SB copy 2, bytenr 274877906944
Opening filesystem to check...
ERROR: superblock bytenr 274877906944 is larger than device size 30054285312
ERROR: cannot open file system
using SB copy 2, bytenr 274877906944
Opening filesystem to check...
ERROR: superblock bytenr 274877906944 is larger than device size 30054285312
ERROR: cannot open file system
using SB copy 2, bytenr 274877906944
Opening filesystem to check...
ERROR: superblock bytenr 274877906944 is larger than device size 30054285312
ERROR: cannot open file system
using SB copy 2, bytenr 274877906944
Opening filesystem to check...
ERROR: superblock bytenr 274877906944 is larger than device size 30054285312
ERROR: cannot open file system
using SB copy 2, bytenr 274877906944
Opening filesystem to check...
ERROR: superblock bytenr 274877906944 is larger than device size 30054285312
ERROR: cannot open file system
using SB copy 2, bytenr 274877906944
Opening filesystem to check...
ERROR: superblock bytenr 274877906944 is larger than device size 30054285312
ERROR: cannot open file system
......
我应该如何处理?
如果需要上述 super 文件 或 return 文件, 可以提供.
试试用这个命令挂载：mount -o recovery /dev/sdX /your/mountpoint
据说这样会选择一个偏旧的，但是能挂载的 root
btrfs check 尝试修复文件系统，但加上 --repair 选项时才真正执行修复 ，建议你备份以下虚拟盘，再试试加--repair选项。反正虚拟盘，备份后不怕数据损坏。
我在三个 super 文件中的指令加入 --repair, 但是输出和之前三个 return 文件相同, 都是错误提示, 无法修复.
它都不觉得这是 btrfs，可能你数据丢的太多。这不是（对于虚拟机）更新时断电能出的问题。估计 win 的蓝屏与磁盘相关，试试检查一下主机的文件系统吧。
看来 btrfs 理想很丰满，但是想用好，还需要自己对她很了解。
如此看来，我还是用 ext4 巴
试一下 btrfs rescue super-recover -v /dev/sda2
来源：https://xpenology.com/forum/topic/13538-how-to-recover-data-from-a-crashed-btrfs-drive-help-request/
我觉得症状差不多，建议先备份虚拟盘，用备份试一下。
检查主机文件系统是指 windows 的文件系统吗?
该如何处理?
执行结果没有发现问题, 但是还是无法挂载
请教一下, 我想尝试 btrfs-zero-log, 但是没有这个命令, 你知道这个命令的安装包的位置吗?
https://roov.org/2017/11/btrfs-repair/
我猜可能要 btrfs restore 导出数据。
新内核又出问题了还是旧内核…
btrfs restore 还是蛮好用的
