ksergei-by,
First of all, the design team is saying that they cannot guarantee support for either of these product classes, but this is mostly because we have never tried using these types of device. They may work just fine; we simply don't know. Without going into an exhausting explanation of the issues, the primary one to consider is as follows:
In order to boot from an add-in storage device - especially one providing a separate SATA interface chip - this device must provide the BIOS with a compatible "Option ROM" that (in loose terms) provides a device driver that the BIOS can use to read from the storage device and start the boot process. You need to determine whether these devices provide such a capability; without it, you will not be able to boot from these devices (or from drives connected to them)...
...Scott
