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[Samba] Writing files > 2GB from Windows

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AndyLiebman

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May 11, 2007, 7:30:08 AM5/11/07
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Can anybody explain why SOME Windows XP applications have trouble
writing files larger than 2 GB (or sometimes larger than 4 GB) to Linux
Samba shares, when OTHER Windows applications on the same machine do not
have difficulty writing large files to the same Samba share? And when
the underlying Linux filesystem supports very large files?

I have sometimes even found that a SINGLE Windows application can write
files larger than 4 GBs while performing SOME operations, but while
performing OTHER operations, when a file gets to 2GB or 4GB, you get
back a message saying "reached file size limit" or something similar.
And those same operations don't cause any trouble when writing > 4GB
files to a local hard drive.

Is there a setting in smb.conf that can communicate better to Windows
applications that large file sizes are supported?

Likewise, is there a Windows XP registry setting that can make sure that
applications know they can write large files to a Samba share?

Help and insight would be appreciated.

Andy Liebman
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AndyLiebman

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May 11, 2007, 2:20:09 PM5/11/07
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and...@bramp.freeserve.co.uk wrote:
> Can these applications write large files to the local disk? It could
> be the fault of the application and not of samba.
>
Yes, you might have missed that I mentioned this below. The
applications have no trouble writing big files (> 4 GB) to a local disk.

I will also reiterate, I have a case in which the very same application
only has trouble under specific circumstances. I am talking about a
Video Editing application. The application can capture most "formats" of
video to the Samba share and produce single files that are 20, 40, 80
GBs in size. But when capturing in a couple of specific formats, the
capture stops when the file reaches 2 GBs with the message "maximum file
size reached". There is no such limit when capturing to a local drive.

Similarly, when "importing" certain formats of video, we see that the
import stops at 4 GBs with a similar error.

> Andrew
>
> ----- Original Message ----- From: "AndyLiebman" <AndyL...@aol.com>
> To: "samba" <sa...@lists.samba.org>
> Sent: Friday, May 11, 2007 12:21 PM
> Subject: [Samba] Writing files > 2GB from Windows

Joseph Loo

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May 11, 2007, 11:30:08 PM5/11/07
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This may be dumb, what is file system you are exporting with samba. If you are
using ext2, I think there is a 2 GByte limit.

--
Joseph Loo
jl...@acm.org

C.Scheeder

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May 12, 2007, 3:00:16 AM5/12/07
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Hm,
it might be a problem of the outputdrivers of your application.
What happens if you try to save these formats to the harddrive of another
computer over your network? (one not running samba)
Do you get the same errors?
Christoph

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