Hot answers tagged partition
Your problem is almost certainly related to partitioning on a Windows machine. You can verify this by using Disk Utility to look at the Drive, in particular the Partition Map Scheme. This needs to be GUID Partition Table but is probably MBR. You would need to repartition on OS X, but this will need you to erase all data.
Wait, before you do that, you can do this in an easier fashion. Just shrink the Mac partition via Disk Utility and format the new free space as FAT32.
The process for creating an extra partition in Mavericks hasn't changed much since Snow Leopard, so you should be able to create a partition using Disk Utility the same way you did in Snow Leopard.
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