Solved

Slow copying from Windows 7, 8 to Windows 2012R2, Dell R730. Using Broadcom BM 57800 card, Raid 5 server, Haswell Chip

Posted on 2014-10-31
7
598 Views
Last Modified: 2016-11-23
This one has me perplexed. Have tried everything Here is the most popular search on google

http://jrs-s.net/2013/04/15/windows-server-2012-slow-networksmbcifs-problem/

1. Have tried suggested settings for Broadcom cards which did not work

Ipv4 checksum offload
largesend offload V2(ipv4)
largesend offload V2(ipv6)
Vm queues
TCP Checksum offload (ipv4)
TCP checksum offload (ipv6)
Udp checksum offload (ipv4)
Udp checksum offload (ipv6)

2. SMB settings are set per the article listed above.

3. Most current drivers on the NIC and the controller

4. Can copy files from the same pcs to other servers without issue. About 100mbs on average

5. This server, 10-12mbs, sometimes slower!!

6. RSS is disabled, Same thing. Enable RSS, same thing.

Have followed this article:

http://blogs.technet.com/b/josebda/archive/2014/01/25/troubleshooting-file-server-networking-issues-in-windows-server-2012-r2.aspx

Any tips would be appreciated.

Thanks
0
Comment
Question by:dronethought
  • 3
  • 3
7 Comments
 
LVL 28

Accepted Solution

by:
Bill Bach earned 500 total points
ID: 40417153
The first thing to determine is if the issue is disk or network. Grab a copy of SQLIO (free diagnostic tool from Microsoft) and run it on your server to test disk throughput speeds. Run a compatative test on another server. If they are roughly equal, then you can eliminate the disk I/O.

Second, eliminate the network itself. Unplug the two servers from the network cables, and switch them around. This will isolate the switch ports, switch configuration, and (if they are in two different switches) the switches themselves.

Finally, download and install Wireshark from www.wireshark.org and obtain a network capture of the file copy process from a workstation. Again, compare the results between copying a file to the bad server and a good server, and you may see some differences. Look for retransmissions or other problems.
0
 
LVL 42

Expert Comment

by:kevinhsieh
ID: 40417298
What was the issue? Bill offered three suggestions.
0
 
LVL 2

Author Comment

by:dronethought
ID: 40420084
Network is fine! Smb signing must be disabled. The issue was the dell Realtek nic in the Xps series. Replacing with Intel desktop gb ct cards. I was testing the slowdown with new pcs that had Realtek cards. Went to a pc with an Intel card and voila, speed is back to 100mbs. The Realtek is at 11mbs.
0
Netscaler Common Configuration How To guides

If you use NetScaler you will want to see these guides. The NetScaler How To Guides show administrators how to get NetScaler up and configured by providing instructions for common scenarios and some not so common ones.

 
LVL 28

Expert Comment

by:Bill Bach
ID: 40420197
FYI -- We have seen Realtek problems before, especially with Dell AIO machines.  Updating to the latest drver from Realtek (instead of the Microsoft or Dell driver) is also a viable option.  Using the Microsoft or Dell version of the drivers results is a problem with TCP stack, and you'll see retransmissions and lost packets on the network analyzer.
0
 
LVL 2

Author Comment

by:dronethought
ID: 40420236
Hi BillBach,
Tried every Realtek driver. No change...

:/
0
 
LVL 2

Author Comment

by:dronethought
ID: 40420238
Thank you. Retransmissions was the issue with the Realtek cards!! Love wireshark.
0
 
LVL 28

Expert Comment

by:Bill Bach
ID: 40420271
Love Wireshark; hate Realtek.  Those of us who have been around for a while remember the Realtek Windows 98 problem, where the NIC would spontaneously corrupt a packet being sent out, by adding a few bytes.  I always get suspicious when I see this vendor being used...
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Restoring deleted objects in Active Directory has been a standard feature in Active Directory for many years, yet some admins may not know what is available.
A procedure for exporting installed hotfix details of remote computers using powershell
This Micro Tutorial will give you a basic overview of Windows DVD Burner through its features and interface. This will be demonstrated using Windows 7 operating system.
This Micro Tutorial will give you a introduction in two parts how to utilize Windows Live Movie Maker to its maximum editing capability. This will be demonstrated using Windows Live Movie Maker on Windows 7 operating system.

920 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

15 Experts available now in Live!

Get 1:1 Help Now