How can ext3 filesystem be converted to ext2 filesystem if the partition is /dev/hda7 ?

tune2fs -O ^has_journal /dev/hda7

tune2fs -o ^has_journal /dev/hda7

tune2fs -a ^has_journal /dev/hda7

tune2fs -A ^hasjournal /dev/hda7

Answer:
tune2fs -O ^has_journal /dev/hda7

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