Time for netmon/wireshark. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Kurt Buff Sent: Friday, May 26, 2017 6:09 PM To: ntsysadm Subject: Re: [NTSysADM] Very strange problem file server - read vs. write
Multiple workstations. I've migrated the file server to different hosts (5 in the cluster), and it doesn't seem to make a difference. Kurt On Fri, May 26, 2017 at 2:17 PM, elsalvoz <[email protected]> wrote: > One, multiple or all workstations? How about server on different host > or physicals? > > Cesar A. > > On May 26, 2017 2:10 PM, "Michael B. Smith" <[email protected]> wrote: >> >> 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 >> > >> > >> >> >
