I've updated the Powershell portion of this routine to collect the total disk free space amount for the drives SQL Server uses. this also requires adding one column to the DatabaseDiskStats table. Details can be found at my blog: http://shaunjstuart.com/archive/2010/11/drive-space-monitoring-gets-an-update-update This should allow you to have better insight into your disk space usage.

Sorry, still no mount point support - I don't have a configuration I can use for testing that.

Shaun