Warning message during rsync to zfs

[Harry Putnam]

I'm doing a sort of hefty (for my small time operations) rsync of
image data from a windows 7 attached, seagate external usb3 drive to
a zfs filesystem running on oi -b 151_a8

oi is running as guest in a Vbox vm on win7 host.

rsync command:
rsync -avvz --stats ***@m2:/cdr/h/ImagesMusic/ \
/extDr-bkup/extDr-ImagesMusic/

The pool where this action is, was created on an external drive thru
the Vbox interface and oi has recognized the disc as usual.

It's a pair of 600+ GB dynamic sata drives created through Vbox on an
external 3tb seagate drive, and paired as a mirrored zpool in oi.

At first I thought these warnings were only coming from processing
directories but I see they can also come from individual files.

Here is an example of the content of the warning I'm seeing piles of:

uid 4294967295 (-1) is impossible to set on
"/extDr-bkup/extDr-ImagesMusic/ImageDB/images/imageArch/scans/ \
BobbieSchool/.BobbieCellStuff2002.tif.QibGWk"

I've wrapped it on a space and an '\' to keep mail format from
slaughtering it but they appear on a single line

I've just not seen this before... and wondered if I need to do
anything about it.

The external disc is formatted NTFS. The z fs has had this command
run on the top directory:

/bin/chmod -R A=everyone@:full_set:fd:allow /extDr-bkup

On the zfs end, I don't recall all I may have done but the basic
command would have been something like this:

zfs create -o mountpoint=/extDr-bkup -o compression=on
-o sharesbm=off p4/extDr-bkup

zfs create -o mountpoint=/extDr-bkup/extDr-ImagesMusic
-o sharesbm=name=p4_extDrImgMus p4/extDr-bkup/extDr-ImagesMusic