"Extended error" when mapping a share in Symantec Recovery Disk 2013

Problem

When trying to map a UNC path to a drive letter in the SRD, you get a message saying that "an extended error has occurred."

Cause

Some NAS or SAN devices using SMB 2.x do not respond with a signed error response as required by SMB 3.0.

Solution

1. Open a Command Prompt window in the SRD (under the Analyze menu).

2. Run regedit.exe.

3. Browse to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters

4. Set RequireSecureNegotiate to 0.

5. Close the Registry Editor and re-try mapping the share.

For more details, please refer to the following Microsoft article: http://support.microsoft.com/kb/2686098.


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