Cannot connect azure file using IIS global.asax

Question

We have been using Azure File with IIS 7.5. We use, in global.asax, a script that mounts azure file to a specific drive allowing our aspx application working with smb files.
It happens sometimes, when VM restarts, that mount operation fails showing the following error
[Exception: WNetAddConnection2 failed with error 1312]
MountShare.Mount(String shareName, String driveLetterAndColon, String username, String password) in e:\Siti\Condomini\CReport\App_Code\MountShare.cs:53
ASP.global_asax.Application_Start(Object sender, EventArgs e) in e:\Siti\Condomini\CReport\Global.asax:14
Global.asax contains these lines of code
    void Application_Start(object sender, EventArgs e)
        String AzureUrl = ConfigurationManager.AppSettings["AzureUrl"];
        String AzureUser = ConfigurationManager.AppSettings["AzureUser"];
        String AzurePassword = ConfigurationManager.AppSettings["AzurePassword"];
        String AzureLocalLetterDrive = ConfigurationManager.AppSettings["AzureLocalLetterDrive"];
        if (!string.IsNullOrWhiteSpace(AzureUrl) && !string.IsNullOrWhiteSpace(AzureUser) && !string.IsNullOrWhiteSpace(AzurePassword) && !string.IsNullOrWhiteSpace(AzureLocalLetterDrive))
            MountShare.Mount(AzureUrl, AzureLocalLetterDrive, AzureUser, AzurePassword);
How can i fix these error that happens randomly after VM restarts ?
Thanks
Francesco

Answer 1

Hi Francesco,
You can create a persistent connection to an Azure File share so that after a VM reboots, the share will be available for your scheduled tasks, applications, or logged in user.
You could refer the following link for details on how to persist connection on IaaS VMs and Windows PaaS roles.
http://blogs.msdn.com/b/windowsazurestorage/archive/2014/05/27/persisting-connections-to-microsoft-azure-files.aspx
Also error 1312 means 'A specified logon session does not exist. It may already have been terminated.', You might consider the code available in the blog to persist connections.
Regards,
Malar.