Migrate existing Ext3 filesystems to Ext4

tune2fs -O extents,uninit_bg,dir_index /dev/yourpartition
Before doing this, back-up all data on any ext3 partitions that are to be converted to ext4. After running previous command you MUST run fsck, is needed to return the filesystem to a consistent state. fsck -pDf /dev/yourpartition Edit /etc/fstab and change the 'type' from ext3 to ext4 for any partitions that are converted to ext4.

5
By: starchox
2009-06-23 17:42:01

What Others Think

I'm voting this up as it _sounds_ like a useful thing and I might well try it out soon after more research - but I'd like to ask starchox to clarify what version of tune2fs has the 'extents' option as it's not on the man page. Also, I think a warning not to run this on a mounted filesystem might be in order - perhaps tune2ef takes care of this, but maybe not.
bhepple · 468 weeks and 3 days ago

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Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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