Starting the Database Instance 
You
are switching the database state from the
operational state
OFFLINE to
the state
ADMIN
(Transferring
to the Operational State ADMIN).
You have the DBM operator authorization DBStart.
On the Microsoft Windows operating system, this database instance must be registered as a service under the name SAP DB: <database_name>. This is done implicitly when you create a database instance with the Database Manager.
db_start [<option>]
Options (<options>) that determine the kernel variant that starts the database instance:
If you do not specify an option, the system makes a service entry for the fastest available variant of the database kernel.

You should only use the options -q |
–quick and
-s |
–slow if
errors occur and in consultation with
SAP DB
Support.
An OK message.
In the event of errors, see Reply Format.