Without a trace I can't be sure. But it seems likely. Have you also verified that the link is negotiating to the highest speed available and that it is error free?
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Kurt Buff Sent: Friday, May 26, 2017 4:04 PM To: ntsysadm Subject: Re: [NTSysADM] Very strange problem file server - read vs. write No, we have not. It's required for some older machines. FWIW, the client's I'm testing with are Win10 1607. I presume that your implication is that turning it off would speed things up? Kurt On Fri, May 26, 2017 at 12:33 PM, Michael B. Smith <[email protected]> wrote: > Have you disabled smb1? > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Kurt Buff > Sent: Friday, May 26, 2017 3:20 PM > To: ntsysadm > Subject: [NTSysADM] Very strange problem file server - read vs. write > > All, > > I have a 2012R2 file server running as a VM on vSphere 6.0. > > Here's what I'm seeing: > > Copy large file (win7 ISO) from file server to workstation, I get roughly > 12-13Mbytes/second, wired or wireless. > > Copy that file from workstation to server over a wireless connection, > same speed - 12-13Mbytes/second > > Copy that file from workstation to server over wired connection, speed > degrades to 1Mbyte/second or less > > Copy that file to another 2012R2 VM on the same host on the same SAN volume > (our print server), and speeds are 12-13Mbytes/second for both wired and > wireless. > > I've made sure that the following are disabled: RSS, atime, 8.3 filename > generation, TCP Chimney. > > RAM and CPU utilization on this machine are well within limits. > > I'm thoroughly stumped. > > Anyone have pointers for me? I'm about to raise a case with MSFT. > > Kurt > >
