samba - Sep 2008 - call_nt_transact_ioctl(0x9005c)

I'm seeing these errors every couple minutes from my Samba server 
(3.0.28... RHEL5 build).

[2008/09/15 11:59:44, 0] smbd/nttrans.c:call_nt_transact_ioctl(2463)
  call_nt_transact_ioctl(0x9005c): Currently not implemented.

I realize what 'currently not implemented' means, and since no users 
have complained, I assume the message is ignorable.

I was wondering however, if anyone can enlighten me as to what ioctl 
0x9005c is/does, and what windows processes/etc might try to use it. 
Perhaps it's something that I can turn off or re-configure on the client 
machines.

Thanks!
-Brian

-- 
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Brian H. Nelson         Youngstown State University
System Administrator   Media and Academic Computing
              bnelson[at]cis.ysu.edu
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