ums_sd.ini isn't working for me. I can boot ums_emmc.ini fine and it does register on my computer, but when running ums_sd.ini I get this:
Read 192 bytes from 'ums_sd.ini', parsing...
LOAD 'PH_0' (uboot/u-boot.elf[0x00010000,0x0006e13f]) -> 0x80100000...