[Samba] Samba Winbind Corrupted .tdb file

[rtsai123]

HI I have an issue with our samba share where some XP users could not connect
to the share anymore.  I traced it to a corrupted
/var/cache/samba/idmap_cache.tdb and winbind_idmap.tdb.   The problem is
that we dont have backup of the .tdb files.  I did, however, found a
solution but not positive it will work.  Has anyone have had this issue
before and had a resolution for it? Below is a solution I found online and
the errors found in /var/log/samba/winbind-idmap.log

Thanks in advance.  



Procedure for rebuilding db files of Samba:

   1. Stopped the services 

service smb stop service winbind stop

   1. Removed these files 

rm -rf /etc/samba/secrets.tdb rm -rf /etc/samba/smbpasswd rm -rf
/var/cache/samba/winbind_idmap.tdb

   1. Rejoined the domain 

net rpc join -W DOMAIN -Uadministrator%password

   1. Restarted the services 

service smb start service windbind start

   1. All these command were succesful 

wbinfo -u wbinfo -g getent passwd 


#cat /var/log/samba/winbindd-idmap.log

[2011/04/22 18:52:28, 0] lib/util_tdb.c:tdb_log(664)
  tdb(/var/cache/samba/winbindd_idmap.tdb): tdb_rec_read bad magic
0x42424242 at offset=25896
[2011/04/22 18:52:28, 0] lib/util_tdb.c:tdb_log(664)
  tdb(/var/cache/samba/winbindd_idmap.tdb): tdb_rec_read bad magic
0x42424242 at offset=25896
[2011/04/22 18:52:28, 0] lib/util_tdb.c:tdb_log(664)
  tdb(/var/cache/samba/winbindd_idmap.tdb): tdb_rec_read bad magic
0x42424242 at offset=25984
[2011/04/22 18:52:28, 0] lib/util_tdb.c:tdb_log(664)
  tdb(/var/cache/samba/winbindd_idmap.tdb): tdb_rec_read bad magic
0x42424242 at offset=25896
[2011/04/22 18:52:28, 0] nsswitch/idmap_tdb.c:idmap_tdb_set_mapping(971)
  Error storing SID -> ID: Corrupt database
[2011/04/22 18:54:48, 0] lib/util_tdb.c:tdb_log(664)
  tdb(/var/cache/samba/idmap_cache.tdb): tdb_rec_read bad magic 0x42424242
at offset=35648
[2011/04/22 18:54:48, 0] lib/util_tdb.c:tdb_log(664)
  tdb(/var/cache/samba/idmap_cache.tdb): tdb_rec_read bad magic 0x42424242
at offset=35648
[2011/04/22 18:54:56, 0] lib/util_tdb.c:tdb_log(664)
  tdb(/var/cache/samba/winbindd_idmap.tdb): tdb_rec_read bad magic
0xd9fee666 at offset=25720
[2011/04/22 18:54:56, 0] lib/util_tdb.c:tdb_log(664)

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