Hello, I still hope I'm mistaken in assuming I have to go back to NFSv3 if I want to skip NFSv4 UID mapping altogether and just use the numeric UIDs the way they're stored on-disk. However if that's actually true, I'd like to try and make a case for implementing an option to turn off UID mapping completely (or at least for unknown UIDs). If this is already work in progress, just ignore this mail. Thing is, the forced UID mapping seems to make tasks like backing up data a little inconvenient. You might want to preserve UIDs that are only known to the client. But when you copy an entire root filesystem, it becomes outright destructive, because the rootfs will probably have several accounts that the server can't be expected know. Just imagine a server that's used for maintenance (like backing up and replacing hard drives) of random (foreign) systems. Idmapd will map all unknown UIDs to a single value and thereby destroy that information. I think I read somewhere that the Sun people already have a way of handling this. Any chance Linux could do that, too? Please excuse me if I'm barking up the wrong tree. If this has already been discussed, I'd appreciate a pointer. Thanks, Victor -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html