"The ESP partition: How many are needed, where, and how big should it be?
Different sources on the internet says different things. Microsft only support one such partition – and that partition needs to be on your boot disk. MS also recommends it to be the first partition on your disk. As for size, according to Rod Smith (see link above) Windows installers create 100MB ESP partitions, Macs create 200MB, while Linux utilities gets confused with FAT16/32 setups if partitions are smaller than 520MiB, so he recommends creating 550MiB for the ESP. My system came with a 300MB ESP partition."
Not sure if this is the case or not. As I find Ubuntu and other distros tend to detect it just fine. http://forums.opensuse.org/showthread.p ... einstalled