Planning the SharePoint/SQL environment you need to keep in mind the number of users, the expected online number of concurrent users and the expected data size per user. This will help you factor in the capacity that you will need for your SharePoint farm. Ensure that you are planning for capacity for your SharePoint environment. FC and ISCSI LUNs and volumes are recommended over CIFS. Ensure that in the SQL Server you separate out the tempdb and system databases on separate volumes that your data and log. Tempdb you do not have to take snapshots of since it is all transient data and is rebuilt ever time you restart the SQL instance. And the backup for your system databases is a streaming backup other than a snapshot. If you need more about specific sizing requirements please contact your NetApp representative and have them go through a sizing exercise with you.