We need a bit more information to know where to start
What version of FOG are you using What version of the FOS kernels are you using What target hardware are you using (manufacturer and model)If you manually register this target computer, then schedule a capture or deploy (doesn’t matter) but before you schedule the task check the debug check box then schedule the task. PXE boot the target computer and after a few enter key presses you will be dropped to a linux (FOS) command prompt. At the FOS command prompt key in lsblk then take a clear picture of the results and post them here.