Netwrok devices have its own database to store configuration and user information. The default database is MySQL if your Analytics database backend is SQL Server. The tables are integrated with Solidcore if Oracle database backend is used for Analytics.
I see user passwords are encrypted using MD5. You should submit a SR with McAfee Support if this infomration is available.
Is it - all the running/startup config copy, everything goes to backend DB also?
I believe so. It is best to submit a case with support to verify with DeviceExpert.