When trying to upload an image file to a Filestream column in SQL Server 2008 using the code below, it fails because the GUID column (UI) is not auto-generating a value - at least that's my reading of the error message, which is: "Cannot insert the value NULL into column 'UI'. Insert fails".
INSERT INTO T_Photos (Filename, Location, Photo)
SELECT 'myImage.JPG', 'London', Photo.*
FROM OPENROWSET (BULK 'C:\myPath\myImage.JPG', SINGLE_BLOB) Photo