Dell FluidFS Customer Notification: Unable to access shares after updating to Windows 10 v1903, using SMB 3.1.1

Table of Contents

1. Description
2. Solution
3. Further Information

Description

After performing a Microsoft Windows update on systems running Windows 10 version 1903 or Windows Server version 1903, Windows clients using SMB 3.1.1 lose access to SMB Shares after Microsoft Windows Update to version 1903 on Windows 10. 

This issue is due to two negotiation contexts found in SMB 3.1.1 that FluidFS version 6.0.300135 and lower does not support.

Identifying the error

The error can be identified from the following error messages:

• The User will see the following error message while accessing the SMB share: 
  "Windows cannot access "\\servername" check the spelling.... Error code 0x80004005 Unspecified error"
   
• The following error message will appear in Windows event viewer:
  "The server does not support any dialect that the client is trying to negotiate, such as the client has SMB2/SMB3 disabled and the server has SMB1 disabled."
   
• If using UNC path such as " \\server\share" you may see:
  "0x80070043 "Network name cannot be found"
   
• Error message in Network traces:
  "STATUS_INVALID_PARAMETER"  
   

Note: The SMB clients must disconnect all the SMB server shares in order to negotiate the appropriate dialect according to the parameter value.

Solution

FluidFS firmware version 'MR640' addresses this problem. Contact support and refernce SLN319473.

1. Access the Dell Storage Manager. 
2. Navigate to Client Accessibility
3. Select the Protocols tab
4. Select Edit SMB Protocol Settings
5. Untick the box next to SMBv3 Protocol
6. Click OK to save settings

Figure 1: Dell Storage Manager DSM - SMB Protocol Settings

 

To modify the SMB version In the latest MR630 – via cli:

Please input the commands as shown below:
 

CLI/client-access/authentication/protocols/SMB-settings> view

SMBv1 Enabled                               = Yes

SMBv2 Enabled                               = Yes

SMBv3 Enabled                               = Yes

Is Required Message Signing                 = No

Is Required Message Encryption              = No

Multichannel Enabled                        = No

Leases Enabled                              = Yes

Oplocks Enabled                             = Yes

Disconnect Idle Sessions                    = No

Idle Sessions Timeout (minutes)             = 720

Idle Sessions Scan Interval (minutes)       = 720

Enable User Claims for Non-Kerberos Clients = No

CLI/client-access/authentication/protocols/SMB-settings> edit

Usage: edit [Options]

    Options:

    -EnableSMBv1 <EnableSMBv1>

    -EnableSMBv2 <EnableSMBv2>

    -EnableSMBv3 <EnableSMBv3>

    -RequireMessageSigning <RequireMessageSigning>

    -RequireMessageEncryption <RequireMessageEncryption>

    -EnableMultichannel <EnableMultichannel>

    -EnableLeases <EnableLeases>

    -EnableOplocks <EnableOplocks>

    -DisconnectIdleSessions <DisconnectIdleSessions>

    -IdleSessionsTimeout <IdleSessionsTimeout>

    -IdleSessionScanInterval <IdleSessionScanInterval>

    -EnableUserClaimsForNonKRBClients <EnableUserClaimsForNonKRBClients>
  

Note: If max dialect SMB 3.1.1 is required, back-rev the Windows 10 version 1903 or Windows Server version 1903 installations to the previous Generally Available (GA) version (1803).

Further Information

More information on configuring SMB file sharing can be found here.