用dd克隆硬盘时报错

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包乾

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Oct 9, 2016, 2:52:27 AM10/9/16
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之前发现自己的windows系统在使用中会出现硬盘错误的警告，所以买了新的硬盘想用dd来把整个硬盘进行克隆。
用的命令是Archwiki上面介绍的dd整盘克隆的方法：
# dd if=/dev/sdX of=/dev/sdY bs=64K conv=noerror,sync

然后在实际克隆过程中终端反复出现这样的错误信息：

...
dd: error reading ‘/dev/sdc’: Input/output error
175742+64 records in
175806+0 records out
11521622016 bytes (12 GB) copied, 1055.6 s, 10.9 MB/s
dd: error reading ‘/dev/sdc’: Input/output error
175742+65 records in
175807+0 records out
11521687552 bytes (12 GB) copied, 1062.74 s, 10.8 MB/s
dd: error reading ‘/dev/sdc’: Input/output error
175742+66 records in
175808+0 records out
11521753088 bytes (12 GB) copied, 1069.91 s, 10.8 MB/s
dd: error reading ‘/dev/sdc’: Input/output error
175862+67 records in
175929+0 records out
11529682944 bytes (12 GB) copied, 1078.93 s, 10.7 MB/s
...后略

这样的情况产生原因是什么？有什么办法可以解决吗

Liang Guo

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Oct 9, 2016, 3:18:24 AM10/9/16
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磁盘部分快损坏。建议挂载文件系统，复制重要文件。

如果能复制出来，说明坏的块不是文件的，如果有文件不能复制出来，说明文件上有坏的块。



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Yu Changyuan

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Oct 9, 2016, 3:19:55 AM10/9/16
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硬件出问题了。多试几次，可能可以读出来。


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Chaos Eternal

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Oct 9, 2016, 3:26:02 AM10/9/16
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不要用DD
用 fsarchiver 


硬件出问题了。多试几次，可能可以读出来。


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Yu Changyuan

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Oct 9, 2016, 3:26:43 AM10/9/16
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On Oct 9, 2016 10:26, "Chaos Eternal" <chaose...@shlug.org> wrote:
>
> 不要用DD
> 用 fsarchiver 

+1

包乾

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Oct 9, 2016, 10:21:44 AM10/9/16
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谢谢！可是如果坏的块不是文件，还有可能是什么呢？是指mbr之类的部分损坏吗

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Yu Changyuan

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Oct 9, 2016, 10:45:40 AM10/9/16
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inode？


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依云

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Oct 10, 2016, 10:19:20 AM10/10/16
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On Sun, Oct 09, 2016 at 11:21:00PM +0900, 包乾 wrote:
> 谢谢！可是如果坏的块不是文件，还有可能是什么呢？是指mbr之类的部分损坏吗

还可以是未使用/已删除的数据。

所以不建议用 dd 嘛，会复制好多无用的数据过去的。如果是简单的文件系统（没
有子卷什么的），传统的 tar 和 rsync 就挺不错的。

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Marco

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Nov 9, 2016, 9:54:39 PM11/9/16
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fsarchiver 学习！

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