[Samba] 2.2.8a-1, Raidzone, filesize > ~17.6GB

[Jeremy Allison]

On Wed, Jun 25, 2003 at 10:54:44AM -0400, Eric N. Moyer wrote:
> I am working with a Raidzone tech to solve a problem with our Raidzone 
> NAS.  The tech told me he has not yet posted to any Samba list about this, 
> and gave me permission to do so.
> 
> Using XCOPY from either NT4SP6a or W2KSP3, over varying network paths, a 
> file of 18,490,235K-1 bytes or smaller will copy to the NAS successfully in 
> about 45 minutes, but a file of 18,490,256K-1 bytes or larger will 
> fail.  The failure occurs in about 7 minutes with a message on the Windows 
> computer of either "end of file reached" (on NT) or "network path no longer 
> available" (on W2K.)  When a copy fails, /var/log/samba/log.<clientname> on 
> the NAS contains messages about "no response to oplock break request".
> 
> During the trials which fail, it seems that no data flows; the lights on 
> the switch show no traffic, the drives on the Windows computer sending the 
> file are not accessed, and the LCD display on the NAS shows only minimal 
> dataflow.
> 
> We could probably narrow the threshold window further, but have not done it 
> yet.
> 
> Setting oplock break wait time = 100 had no perceivable effect.  Disabling 
> oplocks completely resulted in the XCOPY failing with a sharing violation 
> message on the NT box.  (We did not try this variation on W2K.)
> 
> The NAS appears to be running Linux kernel 2.4.18.

Interesting. I always wondered what version of Samba the RAIDZONE
people are running. They haven't asked to be put on our vendors
list to my knowledge. The version of Samba they are running is
far more important. Ask them for the source code to see if any
changes have been made or if it's a standard version and if so
what version it is.

oplock break failures are commonly due to network hardware problems
or sometimes client bugs. All of the known Samba bugs here have
been fixed to my knowledge.

Jeremy.