Hi -
Posting this because I couldn't find a fix on the forums and found it somewhere else.
My system:
Dell NX300
16gb ram
4x 6GB SAS nearline on a PERC H200 in IT mode RAIDZ
My symptoms:
Slow transfer speeds, specifically READS from CIFS. 9-10MBps read, but a full 110MBps write sustained.
Problem isolation:
I was able to isolate the problem by trying doing a transfer from/to a different device (the old NAS that this was replacing) (rsync over NFS) was as fast as the old hardware provided (70-80MBs).
IPerf showed consistent 900+MBs
DD tests showed way higher numbers (like 1.6gbs).
What's interesting is that a WIRELESS client got 30MB/s !! Something was definitely wrong on the client side, specifically driver.
The fix:
After determining that it was indeed the client, I started searching for freenas issues to Windows via CIFS but I found the fix after searching for broader terms (windows 10 slow network speed).
The actual fix was just disabling Large File Offload in the network adapter settings. Boom - 110M/s. The specific steps are here: http://www.peerwisdom.org/2013/04/25/disabling-large-send-offload-windows/
Hope it helps someone else too!
Posting this because I couldn't find a fix on the forums and found it somewhere else.
My system:
Dell NX300
16gb ram
4x 6GB SAS nearline on a PERC H200 in IT mode RAIDZ
My symptoms:
Slow transfer speeds, specifically READS from CIFS. 9-10MBps read, but a full 110MBps write sustained.
Problem isolation:
I was able to isolate the problem by trying doing a transfer from/to a different device (the old NAS that this was replacing) (rsync over NFS) was as fast as the old hardware provided (70-80MBs).
IPerf showed consistent 900+MBs
DD tests showed way higher numbers (like 1.6gbs).
What's interesting is that a WIRELESS client got 30MB/s !! Something was definitely wrong on the client side, specifically driver.
The fix:
After determining that it was indeed the client, I started searching for freenas issues to Windows via CIFS but I found the fix after searching for broader terms (windows 10 slow network speed).
The actual fix was just disabling Large File Offload in the network adapter settings. Boom - 110M/s. The specific steps are here: http://www.peerwisdom.org/2013/04/25/disabling-large-send-offload-windows/
Hope it helps someone else too!
