For future reference of your burned (important) data, it might be handy to use a tool like DVDisaster (sourceforge).

In short, you have to sacrifice up to 20% of the storage capacity from the DVD. For a standard (re)writeable DVD this means that you can store more or less 4GByte of info. The rest of the capacity will be used to store data with which DVDisaster can recalculate your (important) data.

The software is available for Windows, Linux and Mac. What it also can do is checking the consistency of your disc and how fast your DVD player/burner can read the whole disc. When you download the software the online manual is included. My suggestion would be to check that one first to see if this software should be included in your backup strategy or not.

For me it looks like a nice little bit of extra data "insurance" without too much sacrifice (storage wise).

The NTFS file system has proven to be robust over the years. In capabilities it surpassed FAT32 file system since NT4.0 came out. With each new NT-based Windows version the NTFS file system got some improvements and extra functionality.

So no, NTFS is definitely not limited (when compared with FAT32) and because of its robustness tools like Disc Doctor have (almost) lost their purpose. Of course, the meddling hands of Symantec seem to be able to ruin even the best software.