Given that: . My application is IO bound. . I have one active EBS Volume storing my database files. . I need to resize the Volume to keep up with demand. . I'm running Ubuntu Karmic x86_64 GNU/Linux I'd like to introduce a 4 or 8 disk RAID0 array of larger EBS volumes. Such that: . Downtime is minimized. . Performance stays within acceptable ranges. So, is there a way to do a differential mirror of the active volume (many reads/writes) onto the RAID array? My thought is that when I finally do have to take the database server down, it will only be a differential backup in order to become fully synchronized.