Dear All,

I have question about Rollback Segment.
Rollback Segment should create to read consistency. I try one but the error is “cannot create rollback on this tablespace”
RGLSPCE is my tablespace and I create two 20M datafiles on it with empty, no any table.

How can I create rollback segment?

And I have question about diskstrip.
I read my book about performance of database I/O. I can use diskstrip, easy way to loadbalanceing. How I do?