How is mv done across filesystem?

[Peng Yu]

Hi,

It seems the following command across filesystem

mv /filesystem1/src /filesystem2/dst

is roughly equivalent to the following. The idea is that no files will
be deleted from the src unless all files are correctly copied to dst.
Is it so?

cp -p -r /filesystem1/src /filesystem2/dst
rm -rf /filesystem2/dst

Does anybody know the exact equivalent commands to mv so that I can
understand what mv does? Thanks.

-- 
Regards,
Peng