[Samba] Problem with large files corrupting during transfer

Wed Aug 23 12:01:05 GMT 2006

I'm very new to Samba, and I'm supporting my team's migration to a new
server. We are running v3.0.23b, ML3 and AIX v5.3, and we're pulling
data from NT servers. V2.2.2 (what we are using on the old server) would
not compile on the new box, so we have to upgrade.

Files >2.8gb are corrupting during the transfer. That 2.8gb file is the
largest we've gotten to go through successfully. The next largest file
is 5.7gb, and corrupts without fail. The 1st section of the file looks
normal, the next large chunk is corrupt, and the remainder of the file
is simply binary trash. It looks to me like 2(+) users are accessing the
file while it is writing to cache, which would explain this, but I have
no way to prove it. I tried adding 'oplocks = no' and 'strict locking =
yes', but neither fixed the problem. If more info is needed, please let
me know.

Here's the smb.conf:

[global]

        workgroup = CORP

        server string = Qbert at Samba 3.0.23b

        interfaces = xxx.xx.xxx.xxx

        security = DOMAIN

        password server = *

        map to guest = Bad User

        log level = 2

        log file = /usr/local/samba/var/log.%m

        log file = /usr/local/samba/var/log.%S

        max log size = 10000

        deadtime = 150

        max open files = 2048

        local master = No

        domain master = No

        dns proxy = No

        wins server = 10.87.225.225

        create mask = 0774

        directory mask = 0775

        oplocks = No

        socket options = TCP_NODELAY

Here's the log.%S:

[2006/08/22 18:00:44, 2] smbd/reply.c:reply_special(496)

  netbios connect: name1=QBERT           name2=DPREP3

[2006/08/22 18:00:44, 2] smbd/reply.c:reply_special(503)

  netbios connect: local=qbert remote=dprep3, name type = 0

[2006/08/22 18:00:44, 2] smbd/sesssetup.c:setup_new_vc_session(795)

  setup_new_vc_session: New VC == 0, if NT4.x compatible we would close
all old resources.

[2006/08/22 18:00:44, 2] libsmb/namequery.c:name_query(577)

  Got a positive name query response from 10.87.225.225 ( xx.xx.xxx.xxx
xx.xx.xx.xxx xx.xx.xxx.xxx xx.xx.xxx.xxx xx.xx.xx.xxx...

[2006/08/22 18:00:44, 2] libsmb/namequery.c:name_query(577)

  Got a positive name query response from 10.87.225.225 ( 10.87.225.225
)

[2006/08/22 18:00:53, 1] lib/util_sock.c:open_socket_out(896)

  timeout connecting to 10.87.225.225:445

[2006/08/22 18:01:02, 1] lib/util_sock.c:open_socket_out(896)

  timeout connecting to 10.87.225.225:445

[2006/08/22 18:01:02, 2] auth/auth.c:check_ntlm_password(309)

  check_ntlm_password:  authentication for user [NAVSVR2] -> [NAVSVR2]
-> [navsvr2] succeeded

[2006/08/22 18:01:02, 2] smbd/reply.c:reply_tcon_and_X(711)

  Serving IPC$ as a Dfs root

[2006/08/22 18:01:02, 1] smbd/service.c:make_connection_snum(941)

  dprep3 (139.61.176.211) connect to service dpspot initially as user
navsvr2 (uid=4126, gid=209) (pid 283206)

[2006/08/22 18:01:02, 2] smbd/reply.c:reply_tcon_and_X(711)

  Serving dpspot as a Dfs root

[2006/08/22 18:01:02, 2] smbd/open.c:open_file(352)

  NAVSVR2 opened file new.cust/TEST92827.TXT read=No write=Yes
(numopen=1)

[2006/08/22 18:01:02, 2] smbd/close.c:close_normal_file(344)

  navsvr2 closed file new.cust/TEST92827.TXT (numopen=0)

[2006/08/22 18:01:02, 2] smbd/open.c:open_file(352)

  NAVSVR2 opened file new.cust/TEST92827.TXT read=No write=No
(numopen=1)

[2006/08/22 18:01:02, 2] smbd/close.c:close_normal_file(344)

  navsvr2 closed file new.cust/TEST92827.TXT (numopen=0)

[2006/08/22 18:01:02, 2] smbd/open.c:open_file(352)

  NAVSVR2 opened file new.cust/TEST92827.TXT read=No write=No
(numopen=1)

[2006/08/22 18:01:02, 2] smbd/close.c:close_normal_file(344)

  navsvr2 closed file new.cust/TEST92827.TXT (numopen=0)

[2006/08/22 18:01:02, 2] smbd/open.c:open_file(352)

[2006/08/22 18:21:16, 2] smbd/close.c:close_normal_file(344)

  navsvr2 closed file new.cust/per.file1 (numopen=0)

[2006/08/22 18:21:16, 2] smbd/open.c:open_file(352)

  NAVSVR2 opened file new.cust/per.file1 read=No write=No (numopen=1)

[2006/08/22 18:21:16, 2] smbd/close.c:close_normal_file(344)

  navsvr2 closed file new.cust/per.cust1 (numopen=0)

[2006/08/22 18:31:54, 1] smbd/service.c:close_cnum(1141)

  dprep3 (139.61.176.211) closed connection to service dpspot

Here's the log.nmbd:

(This exact message is repeated every 5 minutes)

[2006/08/23 06:46:14, 2] nmbd/nmbd_elections.c:send_election_dgram(41)

  send_election_dgram: Sending election packet for workgroup CORP on
subnet xxx.xx.xxx.xxx

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