Read speed over LAN on server slow from workstation

I installed a Dell Server with Server 2012 Essentials over a network that had three workstations.  The implementation of the server was for a quicker dedicated server to file share quickbooks pro 2010 over the network in multi user mode.  Initially, I thought it was a compatibility issue between the new server OS and the older QB Pro version.  

I finally ran a LAN test from a workstation, that was able to connect to the shared folder on the server.  My write speed was normal at about 88MB, but my read speed ranged from 5-21 MB.  I know QB requires a read speed of at least 40MB so as not to lag ridiculously on file startup.

Any ideas why the read speed would be so slow?
EricZ213Asked:
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mcsweenConnect With a Mentor Sr. Network AdministratorCommented:
If the read is good and the write is crappy I would look at the firmware on your RAID Controller, BIOS, and Hard Drives as well as possibly updated drivers for the RAID.  Since this is a Dell you can just grab the latest SUU for your server and boot from a thumb drive and it will update all firmware that needs it.
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mcsweenSr. Network AdministratorCommented:
SMB Signing has been known to cause issues on servers running 2012 with both the Active Directory and File Server roles installed.  Since you are running essentials it is actually that way by design.  Thanks Micro$oft.

http://mctexpert.blogspot.com/2011/02/disable-smb-signing.html
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EricZ213Author Commented:
I should also mention I spoke with Dell, and they claim with the H200 raid config (no cache), that is the issue.  I adjusted those security settings in the console as per the article, but have not seen a substantial change.  I even tried adjusting ipv4 and ipv6 settings.  Is there truth to what Dell told me?
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EricZ213Author Commented:
When I try to take something from a workstation to the server (lan test from server to workstation) the write speed is slow, but read speed is fast
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