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)