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Martin Hope
OMX
Asked: 2023-02-13 03:44:36 +0800 CST
  • 5

我删除了 4TB 磁盘上的所有文件/dev/sdb1。这是通过rsync --delete命令完成的。

在停止之前，rsync 写入了大约 10GB 的数据。

当然磁盘上没有快照。

文件btrfs系统已挂载到该/home/user/Downloads文件夹​​。

所以我想知道是否有办法恢复数据。

到目前为止（卸载磁盘后）我已经尝试过：

  • btrfs 恢复：

btrfs restore -i /dev/sdb1 /mnt/RESTORE/

其中只恢复了 10GB 的新文件。

  • 我设法使其工作的 btrfs-undelete 脚本：./btrfs.sh /dev/sdb1 /home/user/Downloads/* /mnt/RESTORE/

结果 ：

[...]
Trying root 3001138823168... (1096/1103)
Trying root 853360640... (1097/1103)
Trying root 50626560... (1098/1103)
Trying root 31309824... (1099/1103)
Trying root 31129600... (1100/1103)
Trying root 30900224... (1101/1103)
Trying root 30818304... (1102/1103)
Trying root 30408704... (1103/1103)
Didn't find 'home/user/D*/*
  • 我还尝试使用以下方法手动恢复文件btrfs restore -t 3001556484096 /dev/sdb1 /mnt/RESTORE/：
parent transid verify failed on 3001556484096 wanted 96918 found 96231
parent transid verify failed on 3001556484096 wanted 96918 found 96231
parent transid verify failed on 3001556484096 wanted 96918 found 96231
Ignoring transid failure
ERROR: root [1 0] level 0 does not match 1

Couldn't read tree root
Could not open root, trying backup super
parent transid verify failed on 3001556484096 wanted 96918 found 96231
parent transid verify failed on 3001556484096 wanted 96918 found 96231
parent transid verify failed on 3001556484096 wanted 96918 found 96231
Ignoring transid failure
ERROR: root [1 0] level 0 does not match 1

Couldn't read tree root
Could not open root, trying backup super
parent transid verify failed on 3001556484096 wanted 96918 found 96231
parent transid verify failed on 3001556484096 wanted 96918 found 96231
parent transid verify failed on 3001556484096 wanted 96918 found 96231
Ignoring transid failure
ERROR: root [1 0] level 0 does not match 1

Couldn't read tree root
Could not open root, trying backup super
  • btrfs-find-root -a /dev/sdb1输出 ：
Superblock thinks the generation is 96918
Superblock thinks the level is 1
[...]
Well block 3001381945344(gen: 94646 level: 0) seems good, but generation/level doesn't match, want gen: 96918 level: 1
Well block 3001359089664(gen: 94635 level: 0) seems good, but generation/level doesn't match, want gen: 96918 level: 1
Well block 853360640(gen: 94238 level: 0) seems good, but generation/level doesn't match, want gen: 96918 level: 1
  • btrfs rescue super-recover -v /dev/sdb1输出 ：
All Devices:
        Device: id = 1, name = /dev/sdb1

Before Recovering:
        [All good supers]:
                device name = /dev/sdb1
                superblock bytenr = 65536

                device name = /dev/sdb1
                superblock bytenr = 67108864

                device name = /dev/sdb1
                superblock bytenr = 274877906944

        [All bad supers]:

All supers are valid, no need to recover

所以任何帮助将不胜感激:)

更新 1：

不幸的是，我只能恢复少数损坏的文件。这是我在btrfs-undelete 脚本之后所做的。

  • 将每个 ID 获取到/tmp/ID文件中：
btrfs-find-root -a /dev/sdb1 2>&1 | grep ^Well | sed -r -e 's/Well block ([0-9]+).*/\1/' | sort -rn > /tmp/ID
  • 从 ID 恢复我能做的一切：
for i in $(cat /tmp/ID) ; do mkdir /mnt/RESTORE/"$i"; btrfs restore -o -iv -t "$i" /dev/sdb1 /mnt/RESTORE/"$i" 2>&1; done

我想现在唯一的办法就是找一个文件恢复软件...

btrfs