very slow deletions on ext3 USB drive

Knapp magick.crow at
Fri Sep 18 14:47:04 UTC 2009

> However if you do an ext3->ext4 upgrade, you don't get all of the benefits
> from ext4. For example an upgraded ext3->ext4 disk doesn't use extents
> like a clean formatted ext4 does. You will need to "defrag" the disk with
> a tool like e4defrag, and that will take just as long (or even longer) as
> copying from the old disk to a new disk.
> I suggest that you do some test on a loopback filesystem first, before you
> hose your backup disk. :)
> --
> Amedee

So are you saying that using e4defrag will make and upgraded ext4 disk
as good as a new one?

Douglas E Knapp

Why do we live?

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