FYI: On CentOS 5 ext4 support was added later on. It's called tune4fs. tune4fs supports ext4 whereas tune2fs doesn't. BR -- Freundliche Gruesse/Best Regards Benjamin Hackl Media FOCUS Research Ges.m.b.H. Maculangasse 8, 1220 Wien Austria Tel: +43 1 258 97 01-295 b.hackl at focusmr.com