(Apologies again for the inlined images, I hadn't appreciated there was an alternative to the IMG tag, however I don't think it's worth attaching them and using up forum disk-space so I've replaced them with urls).
I had tried a few varieties of formatter but didn't find anything particularly interesting:
XCOPY 8 non-bootable This one shows a symmetrical (W)XCOPY pattern for part of the disk
DOpus full format (no interesting patterns)
I thought that DOpus used the standard DOS formatter but apparently not (I really should have spotted that).
WB3.0 Full Format (attached) This one, unsurprisingly, is a regular pattern on many disk renderings, thanks for the explanation (it ends 0x444F5BFF "DO[ΓΏ" depending upon your charset)
I'd be interesting in finding other formatters, the "GNU" one is intriguing and the one used in the RSI demo strikes me as pretty in hi-res - so if anyone can suggest formatting programs to try I'll give them a whirl