I've got a 'virgin' machine from Nocster running CentOS 5, including a SATA drive (shows up as "SCSI").
It looks like it'll be a straight-forward install (http://www.howtoforge.com/centos_5.0_xen), but I wondered if anyone has had this exact combination before and if there are any problems I should expect? Given that it's a dedicated machine I don't have physical access to, I'm slightly paranoid about screwing up.
There isn't any problem with doing so. Any modern kernel (including a Xen kernel) will have support for most SATA chipsets. If you're booted up into CentOS now, you'll most likely be able to boot with a Xen kernel.
██ HermeTek Network Solutions
██ Network design, security, and implementation
██ BSD & Linux consulting, training, and hosting
██ https://www.hermetek.com | 1.866.235.1288