[Samba] Are tdbsam and smbpasswd linked?

[MargoAndTodd]

Hi All,

    I just added three users to my tdbsam with
"pdbedit -a -u username" (had to do "useradd"
first).  All three appeared in tdbsam as they
should, as verified with "pdbedit -L".

But, all three also appeared in /etc/samba/smbpasswd.
This is not a mistake, they were not there before.

Are "tdbsam" and "smbpasswd" linked?  I am confused.

Many thanks,
-T