Rollback segment storage parameter

 Hi,

I am trying to create a public rollback segment in a rollback segment tablespace. However, after creating the rollback segment, it seems only the initial parameter is set according to my preference. The next extent and min extents are set to the same values as the tablespace's ones. It doesn't seem to take my parameter.

Here's the script:

create public rollback segment bigrbs

storage (initial 100m next 100m maxextents unlimited)

tablespace rbseg;

The Oracle version is 9.2.0.6. Thanks in advance.