Borland reference to Disable new file sharing and locking semantics

Hello

We have been advising our users to put a check mark alongside the
option above, but we now have one user strenuosly arguing that we are
wrong, as the option would generate problems when a disk defragmenter
was running etc. There are many anectdotal references to the
practice\option in the NGs, but I can't find a Borland article that
mentions it.

Can anyone point me to a good argument for the case?

Regards & TIA