named stream support

[Novgorodsky, Sergey]

Hi -

We run Samba 3.0.24 on Linux to provide a shared drive for DiskXtender (archiving/backup software),
which copies/moves files from Win2003 to our share.

It works fine, but we've had one problem recently :
DiskXtender complained that "File Thumbs.db cannot be moved because the media ARCHIVE does not support named streams."
ARCHIVE is our shared drive. As I understand, Thumbs.db has Alternate Data Streams and our Samba server doesn't support named streams,
 but shouldn't we be still able to just copy/move the file?
How would a client know that Samba doesn't support named streams, which calls are used to determine that?
Are they exposed at VFS module level?

Thanks,
Sergey 

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