Yep, it seems to be a storage system issue unrelated to CIFS. I should have tested for this before emailing the list. I ran sdelete to fill the disk, and it exhibits the same total pause of writing I see in Resource Monitor. I'm speaking with our virtualization engineer but if anyone is good with VMware/SANs I'm happy to hear it. Not sure if that's out of scope for the list.
HOWEVER, I'm still pursuing the other ideas and questions people have sent. I'll answer back as I find out. Thank you so much everyone, Daniel Wolf From: [email protected] [mailto:[email protected]] On Behalf Of Maglinger, Paul Sent: Wednesday, June 24, 2015 4:37 PM To: '[email protected]' Subject: [NTSysADM] RE: Transfer to file server randomly pauses Filling up the write cache on the SAN? From: [email protected]<mailto:[email protected]> [mailto:[email protected]] On Behalf Of Daniel Wolf Sent: Wednesday, June 24, 2015 4:14 PM To: [email protected]<mailto:[email protected]> Subject: [NTSysADM] Transfer to file server randomly pauses I'm pulling my hair out over a devilish problem that's holding up a fileserver migration. Any advice desperately appreciated. When you try to transfer files to the VM, the transfer just randomly pauses and un-pauses after a few hundred megabytes of each burst. The pauses last around 15 seconds but can be a minute or more. It's worse the bigger the file is. 2012 R2 server fully patched with 2 CPU & 5GB of RAM & 60GB system & 800GB storage on VMware backed by a SAN. * File transfer dialog on Windows 8 usually bottoms out at 0 bytes/s when this happens. Pausing or cancelling transfer on client doesn't register until it un-locks. * Resource Monitor on server shows Disk as no activity when this happens except for maybe some random bursts * Happens with robocopy and xcopy as well as native Windows Explorer * Happens connecting from both 2008R2 and Win8.1 with different network paths. * Occurs when transferring to system drive or data storage drive. * NTFS/REFS doesn't matter on storage drive * SMB signing is off * Absolutely nothing installed on the server. NOTHING. No roles. No extra features other than the GUI. * Pauses are worse the bigger the file is. * Data Deduplication and File Resource Monitor used to be installed, but they've been removed for troubleshooting. * Tried uninstalling SMB 1.0 on server Again, ANY ideas or tips appreciated. Thank you! [cid:[email protected]][cid:[email protected]] [cid:[email protected]] Daniel Wolf Neopost USA
