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Adding this Registry fix will solve 98 errors caused by windows OpLocks. This should be done by your networking admin. Please get in contact with this person before contacting RTA.

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title	SMB Version Info

When a Windows Server 2012/Windows 8 "client" connects to a Windows Server 2012/Windows8 "server", SMB 3.x is used by default .

When a Windows Server 2008/2008R2/2012/ or Vista/Windows7/Windows8 "client" connects to a Windows Server 2008/2008R2/Vista/Windows7 "server", SMB 2.x is used by default.

When a Windows Server 2008/2008R2/2012/ or Vista/Windows7/Windows8 "client" connects to a Windows 2000/XP/2003 "server", SMB 1.0 is used by default.

When a Windows 2000/XP/Server 2003 "client" connects to any "server", SMB 1.0 is used.

XP/2003 only do SMB 1.0 (Oplocks1), but 2008/2008R2/Vista /Windows7 can do either SMB 1.0, 2.0, 2.1, depends on the server O/S, See above.

Anchor

	Server 2008 , 2008R2, 2014
	Server 2008 , 2008R2, 2014

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title	Disable OpLocks NOT SERVER 2012

To disable Oplocks 2 & 1 on Oplocks on servers 2008, Windows 2008R2, and
workstations Vista, Windows 7, and Windows 8 except for Server 2012

HKLM\SYSTEM\CurrentControlSet\services\LanmanWorkstation\Parameters - “EnableOplocks” = dword:00000000
HKLM\SYSTEM\CurrentControlSet\services\mrxsmb\Parameters - “OplocksDisabled” = dword:00000001
HKLM\SYSTEM\CurrentControlSet\services\LanmanWorkstation\Parameters -“Smb2″ = dword:0×00000000

Even though Windows 8 does Oplocks 3 disable the client/requests with Oplocks 2 registry edits.

Disable Server 2012 and Windows 8 host based on this KB

Oplocks 3 Microsoft KB

Novell/Netware and Linux have unique Oplocks settings, the above setting would not apply to these.

Anchor

	Server 2012
	Server 2012

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title	Server 2012

For server 2012, there are two steps, one is a powershell script:

Set-SmbServerConfiguration -EnableSMB2Protocol $false
Set-SmbServerConfiguration -EnableOplocks $false
Set-SmbServerConfiguration -EnableSMB1Protocol $true

The second is registry changes:

Registry for Server 2012

Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanmanServer - Key - "DependOnService" needs to be set to SamSS Srv
Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\mrxsmb10 - Key - "DependOnService" needs to be set to mrxsmb
Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\mrxsmb20 - Key - "DependOnService" needs to be set to mrxsmb

Info

Do not hesitate to call RTA Tech Support for information regarding OpLocks.

Also for Reference:

New info for SMB3 aka Oplocks 3 (Windows 8 and Server 2012)

http://support.microsoft.com/kb/2696547

The previous links was

https://support.microsoft.com/en-us/kb/296264

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