Specifically, Citrix XenServer 5.6. I can map the an ISO from a Storage Repository with no issues and mount it inside the OS but I can't boot from the DVD drive without converting it to HVM, which causes problems because the ISO I'm trying to boot from is a Bare Metal restore so it's a tad bit sensitive to whether it boots into paravirt or HVM mode (for example, former uses paravirt drivers for primary HDD at /dev/xvda whereas the latter puts primary HDD at /dev/sda).I've looked online and the only thing I've been able to find are instructions on how to boot from ISO by converting to HVM (which works for the boot, but undercuts the reason for the boot in the first place).I've looked around without much luck on how to configure Citrix's PyGrub to boot from ISO. No joy on that, and the only PyGrub examples I've found don't look like they're going to play well with Citrix and are far too manual for that to be our SOP in case of disaster recovery.
Booting from ISO in Xen Paravirtualized Environment
boot;xen;iso;citrix