| A Linux file system is a collection of various files | | | | can't read superblock" |
| and folders, which is stored in a separate disk | | | | Cause: |
| partition. The entire disk partition is then divided | | | | The cause of this error message is that the |
| into various file system blocks. These blocks are | | | | superblock has corrupted because of the |
| further used for storing the user data or the | | | | aforementioned reasons. |
| metadata. The metadata can be referred as the | | | | Resolution: |
| repository that contains the information of the file | | | | You can restore the primary superblock from the |
| system. This information could either be the type, | | | | various backup copies that the Linux system |
| size, status, or any other information. | | | | maintains for such situations. To do this, you need |
| One such metadata structure is the superblock, | | | | to: |
| which is very essential for the health of the Linux | | | | Find out superblock location for /dev/sda2 |
| system. A file system cannot be mounted if you | | | | Check and repair Linux file system using |
| are not able to access the superblock. This case | | | | alternate superblock # xyz, where xyz is the |
| arises if the superblock is corrupted. Corruption | | | | location of alternate superblock. |
| can happen because of various reasons such as | | | | Mount using mount command viz, # mount |
| virus infections, file system corruption, human | | | | dev/sda2 /mnt |
| errors, etc. In such cases, you should consider | | | | Try to browse and access the file system. |
| taking appropriate measures to perform data | | | | However, if you still are unable to solve the issue, |
| recovery of Linux system. | | | | then you should use a third-party Linux data |
| Consider a scenario wherein you have a Linux | | | | recovery software that will enable you to |
| system having ext3 partition. When you try to | | | | perform Linux recovery. Such read-only tools are |
| access the partition, you are not able to do so. | | | | highly interactive and do not overwrite the original |
| An error message is displayed, that is: | | | | data while scanning the damaged area. |
| "/dev/sda2: Input/output errormount: /dev/sda2: | | | | |