I agree, I must say the only people still running FAT on NT systems these days are those who do so by choice. I know the problems one can run into with FAT and I would never ever run it on a production system (if I ever ran a production windows box). As for the need of a warning, well that would be for the benefit of the php/mysql club who are trying something new, however I doubt any of them would be running FAT, since you cannot even format your partitions as FAT (unless they were already so) in windows XP install. A simple warning is no problem at all in my eyes. All I (and maybe a few others?) want to be able to do is run it on FAT, I am even happy install on another machine and just copying all the stuff over and re initdb'ing :DFor one, there is no security on the files. We takeexplicit steps toensure the security of the files against the pg service account on NTFS (deny-write permissions on everything except the PGDATA directory). This step cannot be done on FAT, obviously.No, but anyone running on FAT already knows that. Our concern is making sure that PostgreSQL cannot be used as an attack route, and ensuring that data is stored reliably. Anything beyond that is starting to become intrusive imo.In my experience, the first sentence of this is not always true. The rest is, though. Since you're clearly pretty convinced we shouldn't put up that warning, I'll defer on this :-)