[6.8.3] appdata won't copy for backup

[m1kepro]

So I'm taking my current server and transferring the drives and boot USB to a new machine. My problem is a little over my hobbyist head, though.

 

The problem is that my new server is used Dell enterprise gear which uses a backplane tied to a RAID card. When you first boot the server with a new drive inside, you have to create a RAID group for any new hard drives inside, even if you only want one drive per RAID group.

 

I do not know if that process will format my drives, so I've made a backup of everything so I can copy it back if the drives erase themselves as part of this process. Every other copy (across ~10TB) has been bit-for-bit perfect except my appdata folder.

 

In there, 2.6 GB out of 88 GB refuse to copy. I've tried everything I can think of, including opening an SSH tunnel to run the command "rsync -av --stats --progress /mnt/disks/172.16.0.4_appdata /mnt/user/SSQRLbox/" as root. No luck.

 

Can anyone tell me why 2.6 GB of data simply *refuses* to be duplicated (even as root) while every other bit transfers without issue?