To disable it, simple navigate to this Registry Key on the RDS server: HKLM\SOFTWARE\Microsoft\WindowsNT\CurrentVersion\TerminalServer\CentralPublishedResources\PublishedFarms\[FarmName]\RemoteDesktops\[FarmName] and change the ShowInPortal REG_DWORD from 1 to 0. Here, you can also update the RemoteApp Name by changing the value of the Name REG_SZ. No need to restart any.

This is actually a warning telling you that your hard drive is going to fail at any time. It probably marked enough bad sectors (to stop them from being used) and realized something will happen with the drive soon. You can.