Uncorrectable bit error handling by rsync?

Suppose rsync on one system is used to synchronize files to another system. Further, suppose rsync encounters an uncorrectable bit error reading a file that is being transferred. What's the chances that rsync corrupts the file on the other system? Thanks, John -- John Conover,

rsync -aAXv to a FAT formatted directory?

Does rsync -aAXv /dir1 /dir2, where dir2 is a mounted FAT formatted SD card, and then: rsync -aAXv /dir2 /dir1, to restore the files in dir1 from the FAT formatted SD card, restore the ACL and owner/permissions of the files and directories in dir1? Thanks, John -- John Conover,