If you get the following error when trying to install SBS 2011
"Unable to install to selected location, error 0x80300001"
Odds are that you have been swapping optical disks around in the drive, looking for the bloody RAID drivers. Because the system can't see any of your hard drive partitions...
The error above is telling you that you have not put the OS installation media back into the DVD drive.
Wouldn't it be nice if it just told you that in the first place?