samba - May 2008 - where samba stored passwords in tdbsam backend?

Hello
I use the backend tdbsam. I have just imported users from smbpasswd 
backend
pdbedit -i smbpasswd -e tdbsam

in global section I set
passdb backend = tdbsam

I use policy (pdbedit -P maximum and minimum password age) to change 
passwords every three months and when the passwords were changed none of 
the files (smbpasswd ,passdb.tdb , secrets.tdb in 
/var/lib/samba/private) has not changed eg. date, size, touch  !!!

Where samba stored passwords ?

I try to hack passwords so I used old smbpasswd style to printing out 
the accounts and passwords
pdbedit -Lw > passwords

I used cisilia password cracker to find out whether passwords are really 
changed (in exported file passwords) and I was suprised when I see 
that's was all old passwords !!! How it is possible when i applied  
password history policy ??
pdbedit - P "password history" -C 3

So how can I check whether passwords are really changed ?? And which 
files stores passwords in tdbsam backend ????  How can I export from 
tdbsam.tdb (by commandline) passwords to plaintext to find out passwords 
was really changed ?



samba version 3.0.28-0.fc7 PDC
security =user

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