使用 ext3grep 恢复数据试验成功笔记

来源: Linux论坛　日期： 2009.07.07 10:03　(共有条评论) 我要评论

CODE:

# software download address : [url]http://code.google.com/p/ext3grep/downloads/list[/url]
# 1、安装 cd /opt wget [url]http://ext3grep.googlecode.com/files/ext3grep-0.10.1.tar.gz[/url] tar -zxf ext3grep-0.10.1.tar.gz cd ext3grep-0.10.1 ./configure make make install
# 2、制造分区 mkdir /home/sheng cd /home/sheng dd if=/dev/zero of=file count=102400 mkfs.ext3 file # ！！！！按Y继续 mount -o loop /home/sheng/file /mnt/
# 可以看到已经挂上去了 df -h
# 写入数据到 /mnt mkdir /mnt/del echo 1 > /mnt/del/1 echo 2 > /mnt/del/2 echo 3 > /mnt/del/3
# 删除数据 rm -rf /mnt/del
# 3、开始恢复 # 卸载文件所在的分区 /home/sheng/file umount /home/sheng/file # 查看 df -h
# 扫描分区 ext3grep /home/sheng/file --ls --inode 2
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[[email protected] sheng]# ext3grep /home/sheng/file --ls --inode 2 Running ext3grep version 0.10.1 Number of groups: 7 Loading group metadata... done Minimum / maximum journal block: 447 / 4561 Loading journal descriptors... sorting... done The oldest inode block that is still in the journal, appears to be from 12454502                                                                                           09 = Sat Jun 20 06:23:29 2009 Number of descriptors in journal: 17; min / max sequence numbers: 2 / 3 Inode is Allocated Finding all blocks that might be directories. D: block containing directory start, d: block containing more directory entries. Each plus represents a directory start that references the same inode as a direc                                                                                           tory start that we found previously.
Searching group 0: DDD++ Searching group 1: Searching group 2: Searching group 3: Searching group 4: Searching group 5: Searching group 6: Writing analysis so far to ‘file.ext3grep.stage1‘. Delete that file if you want                                                                                           to do this stage again. Result of stage one:   3 inodes are referenced by one or more directory blocks, 2 of those inodes are                                                                                           still allocated.   1 inodes are referenced by more than one directory block, 1 of those inodes is                                                                                           still allocated.   0 blocks contain an extended directory. Result of stage two:   2 of those inodes could be resolved because they are still allocated. All directory inodes are accounted for!
Writing analysis so far to ‘file.ext3grep.stage2‘. Delete that file if you want                                                                                           to do this stage again. The first block of the directory is 433. Inode 2 is directory "". Directory block 433:       .-- File type in dir_entry (r=regular file, d=directory, l=symlink)       |       .-- D: Deleted ; R: Reallocated Indx Next |  Inode | Deletion time                      Mode       File nam                                                                                           e ==========+==========+----------------data-from-inode------+-----------+========                                                                                           = 0 1 d    2                                        drwxr-xr-x  . 1 2 d    2                                        drwxr-xr-x  .. 2  end d    11                                        drwx------  lost+fou                                                                                           nd 3  end d 5497  D 1245450214 Sat Jun 20 06:23:34 2009  drwxr-xr-x  del [[email protected] sheng]#
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# 查询 ext3grep /home/sheng/file --ls --inode 2
# 恢复单个仅目录里面的文件恢复失败 .. ext3grep /home/sheng/file --restore-file del --depth del
# 恢复目录里面的一个文件 ext3grep /home/sheng/file --restore-file del/1
# 恢复所有文件 ext3grep /home/sheng/file --restore-all

点击下载软件：ext3grep
1. 查看所需的相关库
[[email protected] ~]# rpm -qa |grep e2fsprogs
e2fsprogs-libs-1.39-8.el5
e2fsprogs-1.39-8.el5
e2fsprogs-devel-1.39-8.el5

注：RHEL4下没有libs程序，但依然可以安装ext3grep 0.7.0 必须要有e2fsprogs-libs，不然在后面ext3grep的安装会有问题。
2.查看一下分区情况: [[email protected] ~]# df –h

3. 需要软件 http://code.google.com/p/ext3grep/downloads/list 先下载软件 [[email protected] ~]# cd /root/src/ [[email protected] src]# wget http://ext3grep.googlecode.com/files/ext3grep-0.6.0.tar.gz  src 注：作者已下载过不再下载
4.安装ext3grep A．先挂载光盘

B.安装步骤： 1.[[email protected] ~]# tar zxvf ext3grep-0\[1\].10.1.tar.gz –C /usr/src <将文件解压到/usr/src目录下> 2.[[email protected] ~]# cd /usr/src/ext3grep-0.10.1 -> <进入目录中> 3.[[email protected] ~]# ./configure      <配置> 4.[[email protected] ~]# make && make install <编译并安装>

5.为方便实验，我们可以模拟一个出来，下面是模拟步骤： a.      # mkdir /data/ b.      # cd /data/ c.      # dd if=/dev/zero of=disk1 count=2048000 d.      # mkfs.ext3 disk1 e.      # mkdir -p /dfs/a f.       # mount -o loop /data/disk1 /asd/a

如图，已建立一个模拟分区/data/disk1
6.在/asd/a下新建文件beijing， shanghai
7.后将beijing，shanghai 文件删除

8. 文件没有了然后我们来恢复： 首先必须umount掉误删除数据的分区： [[email protected] ~]# umount /data/disk1 [[email protected] ~]# df –h

9. 确认卸载，然后使用ext3grep来恢复。 [[email protected] ~]# ext3grep /data/disk1 --ls --inode 2 这里会创建扫描分区

从图中可以看到被删除的beijing，shanghai两个文件
10.恢复数据 [[email protected] ~]# ext3grep /data/disk1 --restore-file shanghai
数据成功恢复 [[email protected] ~]# ext3grep /data/disk1 --restore-file Beijing
11.[[email protected] ~]# ls -la RESTORED_FILES/

注：被恢复的数据默认恢复到RESTORED_FILES/目录下
12.在RESTORED_FILES下的成功恢复的文件或目录可以做任意操做，作者将其又放回到了原位置