Just mentioning it before I forget about it again, that at some point during some reversing I found that the $LogFile's smallest size can actually be 200 bytes. And not 256 as earlier suggested. So, if you want to, you can create even smaller NTFS volumes, as a PoC or project or whatever. I certainly don't remember any offsets, but the patch was almost identical to the already posted details (for XP), and it was performed on the wow64 untfs.dll on Windows 7 x64.