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Sent from my iPhone On Jun 24, 2015, at 5:37 PM, Maglinger, Paul <[email protected]<mailto:[email protected]>> wrote: 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]]<image004.png> <image005.png> Daniel Wolf Neopost USA
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