Does mv on a FAT filesystem actually rename or does it copy and delete?

[Chris Green]

On Sat, Feb 03, 2018 at 09:50:31AM +0000, Chris Green wrote:
> I want to rename some picture files on a mounted digital camera
> filesystem.  It is a VFAT filesystem.
> 
> If I rename one of the files using 'mv <xxxx.yyy>' will the file

Typo of course, I meant 'mv file1 file2'.

> *actually* be renamed by changing the directory entry only or will
> mv copy the file to one with the new name and then delete the old one? 
> 
Thanks for the answers so far but to re-emphasise why I asked the
question:-

    I know that mv of a file in a directory on a Linux type filesystem
    will just write the new name of a file in the directory without
    moving the data/contents of the file.

    However in different circumstances (e.g. across filesystems) it
    *can't* do this and has to copy/delete.  I was just asking if
    anyone knows if 'mv file1 file2' on a VFAT (i.e. not native Linux)
    filesystem does the 'easy' thing (copy/delete) or not.

-- 
Chris Green