Home > Storage > Data Storage Essentials > AppSync > Dell AppSync Integration with Microsoft SQL Server > Mounting multiple database copies existing on same production LUNs or consistency groups
This scenario may occur when the file systems that are being mounted, are already mounted for another set of databases in the same service plan run. If several databases share the same storage LUNs or Consistency Group, and the databases get split due to the restriction on the number of databases per run (see the Efficiency section for more details), only one of the resulting groups is mounted successfully. The group that gets mounted first will mount successfully and the next ones will fail and a warning explaining the reason will be displayed.
The option Maximum number of SQL databases, in the service plan Advanced Plan Settings section under Define the copy step, can be set to a higher value (default recommended value of 35). It is done to force all databases in a single group to be copied together. We do not recommend this action from a performance point of view. Careful planning of the storage layout of databases in advance may prevent this issue from occurring.