[CentOS] Convert Filesystem to Ext4

Tue Apr 19 17:42:43 UTC 2011
Matt <lm7812 at gmail.com>

On a running 64 bit CentOS 5.6 box is it possible to convert from Ext3
to Ext4 to improve performance?  Right now I can deal with a few hours
of downtime on it.  This is an email server with lots of I/O due to
seek time.  Software RAID1 as well.  Will Ext4 offer much of an