After I installed vsphere on to a raid drive, it wouldn't boot off of the raid drive. The error I get is from the BIOS stating that it couldn't find a boot device. In the BIOS, the raid array is chosen as the boot device (well, it sees the raid card; not the drive).
The raid card is an adaptec 2405 (Adaptec by PMC | Adaptec RAID Series 2).
Not sure what other information I can pass along.
BTW, windows 2012 installs to the raid and boots just fine. With no BIOS differences between the windows 2012 and vsphere scenarios.