samba - Mar 2009 - Text File Corruption Writing from Windows to Linux NFS Share.

I am running a Windows 2003 Server with Microsoft Services for UNIX (SFU) 
installed which is serving NFS shares to a Redhat Enterprise Workstation 
v5 Linux machine which is running Samba 3.0.33-3.7.el5.  There is also a 
Solaris 5.6 workstation serving NFS shares.  All of these are mounted on 
the RHEL machine and are visible to Samba.  I can read and copy anything 
from any share using Windows Explorer to my Windows XP Pro machine.  I can 
copy to and/or write anything I want on the Solaris shares.  If I attempt 
to write a PDF file to any of the SFU shares, the write fails with a 
Windows message that either the file is busy (which it is not) or the 
share does not have write permissions (which it does).  If I attempt to 
copy a text file to this same share using Windows Explorer, the copy 
succeeds.  However the contents of the file is lost leaving only a stream 
of null characters.  If I attempt to edit a text file on any of the SFU 
shares, the contents of the file is replaced by a bunch of null 
characters.  Yet, if I use Cygwin on the same XP Pro machine to copy the 
same text file from the same Windows directory to the same SFU share via 
Samba, the copy works just fine.

Do SFU shares need to be mounted with some "special" switch on the
RHEL
machine for Samba to be able to write to them?  Is there some obscure 
Samba configuration switch that I've missed?

Any help that might point me in the right direction would be appreciated. 
Thank you.

Stephen Hunter
Systems Administrator
DDC-I, Inc.
shunter@ddci.com


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On Mon, Mar 23, 2009 at 02:06:34PM -0700, shunter@ddci.com
wrote:
> Do SFU shares need to be mounted with some "special" switch on
the RHEL
> machine for Samba to be able to write to them?  Is there some obscure 
> Samba configuration switch that I've missed?
Wow, that's a twisted net of mounts. To get you right:

You use the SFU NFS server to mount -t nfs on a RHEL box.
You use Samba to re-export this to a Windows XP machine.
You get file corruption when writing to that samba export.

Right?

Question: Why don't you just mount directly from W2k3? And,
you might just try "posix locking = no" and "kernel oplocks
= no" in your smb.conf.

Volker
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