turning an “ext2” or “ext3” file system into an “ext4” one

root# tune2fs -j /dev/sdXY # add an ext3 journal, if we start with ext2
root# tune2fs -O extents,uninit_bg,dir_index /dev/sdXY
root# e2fsck  -f /dev/sdXY # maybe you want to add …
                           # “-C 0” : progress bar
                           # “-p”   : automatically repair!
                           # “-D”   : optimize directories

To be worked on …


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