How to Fix “can’t read superblock” Error ...

前天外面出差大数据测试环境平台有7台服务器挂了，同事重启好了五台服务器，但是还有两台服务器启动不起来，第二天回来后我和同事再次去机房检查，发现两台服务器都显示superblock</b>的报错，经过一番处理后两台服务器都正常进系统了，现决定重现superblock</b>故障并将此类问题故障处理思路写下来方便后面新同事参考。 在「blog.csdn.net」查看更多資訊 硬盘的物理结构侧视图和俯视图，这两张图传递出来的比较重要的信息如下： 磁盘划分为磁头(Head),柱面(Cylinder)，扇区(S

To fix a bad superblock, execute e2fsck with alternate superblock commands like e2fsck -b 8193 or e2fsck -b 32768. However, if you experience frequent failures, it could signify hardware issues, suggesting that you should back up data immediately.

First, get a root console (e.g. via grub) and pull up a list of partitions: And from there you take the one you need (e.g.: /dev/sda3). Choose carefuly! And then, you got it: The superblock could not be read or does not describe a correct ext4 filesystem.

Unfortunately, I was unable to recover the file system and had to resort to lower-level data recovery techniques (nicely summarised in Ubuntu&#39;s Data Recovery wiki entry), of which Sleuth Kit proved most useful.

Repair Corrupted EXT4 &amp; EXT3 File System You can repair a non-root corrupted ext3 or ext4 file system on a running Linux system. fsck works as a wrapper for the fsck.ext3 and fsck.ext4 commands.

ext4文件系统的superblock损坏，利用备份块恢复 修复过程 检查文件系统 fsck.ext4 /dev/sdb -a: 自动修复文件系统，不询问任何问题 -A: 依照/etc/fstab配置文件的内容，检查文件内所列的全部文件系统 -t &lt;文件系统类型&gt;: 指定要检查的文件系统类型 -y: 自动输入yes ...

This tutorial shows you how to fix the can not read superblock error on Linux for ext4 and Btrfs file system.