Converting a Non Root Ext File System to a Later Version

Caution:

Before performing a file system conversion, make a backup of the file system from which you can restore its state.

Unmount the current file system:
```
sudo umount filesystem
```
Check the system by running the fsck command appropriate to the file system. For example, if the file system is ext2, you would use fsck.ext2 as follows:
```
sudo fsck.ext2 -f device
```
Use the following command with the block device corresponding to the file system:
```
sudo tune2fs -j device
```
This command adds an ext3 journal inode to the file system.
Check the file system by using the fsck command appropriate to the higher version. For example, if the new file system is ext3, you would use fsck.ext3 as follows:
```
sudo fsck.ext3 -f device
```
Correct any entry for the file system in the /etc/fstab file so that its type is defined as the later file system version, for example, ext3 instead of ext2.
Remount the file system.
```
sudo mount filesystem
```

For more information, see the tune2fs(8) manual page.