Issue: Unable to create a content database to use RBS with FILE STREAM in SharePoint 2013.

Solution: While enabling Remote Blob Storage on SharePoint servers, we need to run these PowerShell commands to enable RBS:

$cdb = Get-SPContentDatabase WSS_Content_2500 #Set you database name
$rbss = $cdb.RemoteBlobStorageSettings
$rbss.Installed()
$rbss.Enable()
$rbss.SetActiveProviderName($rbss.GetProviderNames()[0])

When you run the line $rbss.Enable() sometimes we get an error saying “SQL remote blob storage must be installed on each web front end server and on the content database before it may be used.”

To resolve this problem, we need to restart all servers in the Farm. After restarting, it will work like a charm.

- See more at: http://expertsharepoint.blogspot.de/2014/09/sql-remote-blob-storage-must-be.html