[Samba] Large file transfer fails when multiple network drives from different servers are mapped
Vladimir Rosu
z_s_u at yahoo.com
Tue Jul 2 12:20:56 MDT 2013
Hi all,
I have the following problem which haunted me for a very long time, and
I did not found an solution for as long as I searched:
Laptop:
- Windows 8 Pro 64bit (happened also on Windows 7 Home Edition 64 bit)
- 5 network drives are set up in this computer: 4 drives are guest
accesible and one is accessible using specific user and password
(retained by Windows)
Server 1: Ubuntu Server 13.04, with Samba 3.6.9 with smb.conf file added
below, in a 192.168.72.0/24 LAN
Server 2: Ubuntu Server 9.10, with Samba 3.4.0 with smb.conf file added
below, in a 192.168.1.0/24 LAN
When accessing Server 1, Server 2 is not accessible and vice-versa
(different locations).
When I try to copy large files (1-10 GB) from Laptop to Server 1, at
some intervals the transfer fails, with the message "Network error.
There is a problem accessing Z:\ Make sure that you're connected to the
network and try again.".
The specific interesting section from the samba log is below.
[2013/07/02 20:45:53.854564, 2] smbd/open.c:704(open_file)
nobody opened file xxx.mkv read=Yes write=Yes (numopen=3)
[2013/07/02 20:45:57.915958, 2] smbd/close.c:696(close_normal_file)
nobody closed file desktop.ini (numopen=2) NT_STATUS_OK
[2013/07/02 20:52:57.083125, 1] smbd/service.c:1114(make_connection_snum)
vr-pc (192.168.72.102) connect to service games initially as user
nobody (uid=65534, gid=65534) (pid 4580)
[2013/07/02 20:52:57.086980, 1] smbd/service.c:1114(make_connection_snum)
vr-pc (192.168.72.102) connect to service diverse initially as user
nobody (uid=65534, gid=65534) (pid 4580)
[2013/07/02 20:55:06.485696, 2] auth/auth.c:319(check_ntlm_password)
check_ntlm_password: Authentication for user [VR] -> [VR] FAILED
with error NT_STATUS_NO_SUCH_USER
--------------at this point the transfer fails on the
desktop------------------
[2013/07/02 20:55:10.611281, 1] smbd/service.c:1114(make_connection_snum)
vr-pc (192.168.72.102) connect to service P-Z initially as user
nobody (uid=65534, gid=65534) (pid 5842)
[2013/07/02 20:55:10.614556, 1] smbd/service.c:1114(make_connection_snum)
vr-pc (192.168.72.102) connect to service 1-O initially as user
nobody (uid=65534, gid=65534) (pid 5842)
-------------------------------------------------------------------------------------------------------------------------------
I believe that my laptop tries to authenticate with the username set for
the share which is on Server 2, obviously not present on Server 1, and
when that authentication fails, it resets all ongoing transfers.
Now, this problem was not present when both servers were running same
Samba version, it only appeared when I installed Ubuntu 10.04 LTS on
Server 1. The problem stayed on a fresh install
of Ubuntu 13.04. Please forgive me that I don't write the specific Samba
versions, but I think you understand the fundamental issue.
Because that this problem was not present on older Samba version, and
because it doesn't seem logical it seems that this is a bug. However, if
anyone of you who has more knowledge about this specific issue knows
more, I would be happy to listen.
Note: you may see some deprecated options in the smb.confs' below, is
because I tried some other fixes from internet just to be sure.
Server 1 smb.conf file:
-------------------------------------------------------------------------------------------------------------------------------
[global]
log file = /var/log/samba/log.%m
read raw = no
write raw = no
passwd chat = *Enter\snew\s*\spassword:* %n\n
*Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .
socket options = TCP_NODELAY
obey pam restrictions = yes
null passwords = yes
interfaces = 192.168.72.200/255.255.255.0
map to guest = bad user
encrypt passwords = true
winbind trusted domains only = yes
winbind use default domain = yes
passdb backend = tdbsam
passwd program = /usr/bin/passwd %u
wins support = true
dns proxy = no
server string = %h server (Samba, Ubuntu)
unix password sync = yes
workgroup = INFORM
os level = 20
debug level = 2
socket address = 192.168.72.200
syslog = 0
preferred master = yes
panic action = /usr/share/samba/panic-action %d
usershare allow guests = yes
max log size = 1000
pam password change = yes
[printers]
comment = All Printers
browseable = no
path = /var/spool/samba
printable = yes
guest ok = no
read only = yes
create mask = 0700
[print$]
comment = Printer Drivers
path = /var/lib/samba/printers
browseable = yes
read only = yes
guest ok = no
[P-Z]
hide dot files = no
writeable = yes
public = yes
create mode = 775
path = /mnt/movies1
directory mode = 775
guest ok = yes
[games]
writeable = yes
path = /mnt/diverse
guest ok = yes
hide dot files = no
create mode = 775
public = yes
directory mode = 775
[1-O]
writeable = yes
delete readonly = yes
path = /mnt/movies2
hide dot files = no
create mode = 775
public = yes
directory mode = 775
guest ok = yes
[diverse]
writeable = yes
public = yes
path = /mnt/diverse2tb
-------------------------------------------------------------------------------------------------------------------------------
Server 2 smb.conf file:
-------------------------------------------------------------------------------------------------------------------------------
[global]
log file = /var/log/samba/log.%m
passwd chat = *Enter\snew\s*\spassword:* %n\n
*Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .
hide unreadable = yes
obey pam restrictions = yes
interfaces = eth0
map to guest = bad user
encrypt passwords = true
veto files = /.??*/
passwd program = /usr/bin/passwd %u
passdb backend = tdbsam
wins support = true
dns proxy = no
netbios name = server
server string =
remote announce = 192.168.1.255
workgroup = INFORM
os level = 20
security = user
syslog = 0
panic action = /usr/share/samba/panic-action %d
usershare allow guests = yes
max log size = 1000
bind interfaces only = yes
pam password change = yes
[work]
delete readonly = yes
writeable = yes
path = /media/hdd1tb/work
revalidate = yes
valid users = removed user names
create mode = 775
allow hosts = 192.168.1., 127.,192.168.22.
directory mode = 775
-------------------------------------------------------------------------------------------------------------------------------
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