anatomy of samba's secrets.tdb

[todd_dsm]

Hey all,

I have a working server that I've been comparing to my non-working server. Everything seems to be the same except the contents of my secrets.tdb. So I thought I would ask for expert input as I know nothing about it. Here's the contents of the secrets.tdb on the working server:

$ tdbtool /etc/samba/secrets.tdb dump

key 30 bytes
SECRETS/LDAP_BIND_PW/rootbinddn
data 8 bytes
[000] 67 30 64 68 33 61 64 00                           correct_password 

key 15 bytes
SECRETS/SID/WORKGROUP
data 68 bytes
[000] 01 04 00 00 00 00 00 05  15 00 00 00 CB F3 17 5C  ........ .......\
[010] 45 AB D2 80 97 FA 86 21  00 00 00 00 00 00 00 00  E......! .......
[020] 00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  ....... .......
[030] 00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  ....... .......
[040] 00 00 00 00                                       ... 

key 19 bytes
SECRETS/DOMGUID/WORKGROUP
data 16 bytes
[000] E5 CB AC 51 98 26 80 48  A6 1F 6E 70 60 BA CE 86  ...Q.&.H ..np`...

key 18 bytes
SECRETS/SID/NETBIOS_NAME
data 68 bytes
[000] 01 04 00 00 00 00 00 05  15 00 00 00 CB F3 17 5C  ........ .......\
[010] 45 AB D2 80 97 FA 86 21  00 00 00 00 00 00 00 00  E......! .......
[020] 00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  ....... .......
[030] 00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  ....... .......
[040] 00 00 00 00                                      ...

I have nearly the same output in my non-working server except this:

key 19 bytes
SECRETS/DOMGUID/NEWWORKGROUP
data 16 bytes
[000] E5 CB AC 51 98 26 80 48  A6 1F 6E 70 60 BA CE 86  ...Q.&.H ..np`...

Out of curiosity I was hoping that someone could explain the relevance of each of these lines. And, possibly why the non-working server doesn't have an entry for SECRETS/DOMGUID/NEWWORKGROUP.