Hello SRI DBA.

Davey23UK said it, creating a database manually gives the dba more controll over creating the structure, the majority of the files, and where those files are located.

See here.

Manually
c:
ACME--->data, create, pfile, udump, cdump, bdump, control1, control2, redo1, redo2, backup, scripts. This is just the start. Keep in mind, as Davey23UK stated, when you create a database manually you must also create the pfile, and that will be determined by what parameters will be required by those needs of the people you work for.

Creating a database automatically forces the dba to have to wade through 3 directories, it's sub-directories to manage the database, creating a database manually places the bulk of the files in
ONE ONE directory, of course it's sub-dirctories as well.

It's ease of management.

Rick