umount /dev/sda1

fsck.ext3 -pf /dev/sda1



tune2fs -O extents,uninit_bg,dir_index /dev/sda1



fsck -pf /dev/sda1



/dev/sda1 /disk ext4 defaults 0 2



mount /disk





Any existing Ext3 filesystem can be migrated to Ext4 with an easy procedure () which consists in running a couple of commands.This means that you can improve the performance, storage limits and features of your current filesystems without reformatting and/or reinstalling your OS and software environment.First, unmount the partition:Next, run a filesystem check on it to make sure it is in sane condition.Enable new features of ext4 on the filesystemRun a filesystem check. to make sure that the filesystem is now clean.Now edit yourfile and replace "" with "" for /dev/sda1. Other options may differ for your system.Try to mount your new ext4 filesystem: