on 4/19/2011 10:42 AM Matt spake the following: > 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 > improvement? http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/96/html/Migration_Planning_Guide/ch03s02.html