I recently upgraded my mac Mavericks at the same time as I swapped the hard drive for a new, larger capacity one, making for a fresh install (i.e. not an upgrade of the software). I kept the old hard drive, mounted it into an external caddy, and I am now trying to recover my files.
The issue I am having is that I cannot access (or even see) the old NTFS Boot Camp partition. I can access it with a windows laptop, so I know the partition is there and seemingly healthy. My mac can access the old HFS+ boot partition, but Disk Utility doesn't even identify the ntfs partition as existing. The disk has a GUID partition table if that makes any difference (I suspect that isn't the problem however, since it can see the size of the HFS+ partition).
I am finding this to be a difficult problem to diagnose, as every search I attempt reliably informs me that all recent versions of OS X have read-only support for NTFS built-in, and thus most articles and forum posts are about how to enable write support. While writing to the disk would be nice, I only really need to be able to read from it for now.