linux(redhat7.2)下如何??ext2分?格式化成?ext3?或者由ext3格式化?ext2?

linux(redhat7.2)下如何??ext2分?格式化成?ext3?或者由ext3格式化?ext2?

Can someone tell me?
linux(redhat7.2)下如何??ext2分?格式化成?ext3?或者由ext3格式化?ext2?

tks!

      
ext2->ext3: tune2fs -j /dev/hdax
ext3->ext2: tune2fs -O ^has_journal /dev/hdax
为什么要把ext3转换回ext2?