Following a discussion about disk quotas on the ubuntu-fr french forum (see http://translate.googleusercontent.com/translate_c?hl=fr&sl=auto&tl=en&u=http://forum.ubuntu-fr.org/viewtopic.php%3Fpid%3D3618449&rurl=translate.google.fr&usg=ALkJrhjuDE1tPagO6ztdnU7_GOp6__8MBw#p3618449\). I came out with the idea that the reserved space in the -m tune2fs option should be smarter as it is right now.
Actually, with the growing hard disk sizes and thus partition sizes, a 5% reservation seems too high for storage partition (or even system partition). Let's see :
5% of 1To = 50 Go
5% of 2To = 100 Go
So instead of a linear relation between reserved ratio and blocks_count, there should be a logarithmic one.
Is there any fragmentation issue with doing that ?