I could never get my drive to be read by the ps3 when it had 2 partitions on it. I was doing the same, 1 fat32 and 1 ntfs. Now that im only using fat32 its fine! Just hope sony see fit to add ntfs support in an update! Its a pain being restricted to filesizes of under 4gb
i doubt they will let it use ntfs that would be unethical, maybe they should let it read linux ext2 partitions i would happily reformat my external to ext2.