Macintosh bootable volumes are supported on the internal 2-port PCI card (part number TSATA) but are not supported on any of the other SATA cards at this time.
Yes, but it depends on the computer's operating system (Mac OS or Windows). Sonnet Tempo SATA PCIe, PCI-X, PCI, and ExpressCard/34 cards support drive hot swapping only when used in Mac computers running Mac OS. SATA drive hot swapping is not supported in a desktop or server PC running Windows XP, Server 2003, or Vista. A SATA drive appears to Windows as a fixed hard drive and there is no mechanism in Windows to prepare the drive for removal except in notebook computers.
Tempo SATA and SATA Pro ExpressCard/34 cards support drive hot swapping in both Mac and Windows notebook computers.