Yet another sizing question: Solution Manager Install on Oracle and Redhat

We are trying to install SM 7.0 and are encountering sizing errors. We have setup our sapdataX's as per note 972263:

SAP Solution Manager 4.0 SR3:

File System Name Space Requirement

/oracle/<DBSID>/sapdata1 18 GB

/oracle/<DBSID>/sapdata2 20 GB

/oracle/<DBSID>/sapdata3 9 GB

/oracle/<DBSID>/sapdata4 1 GB

SUM 48 GB

In actual fact we increased it to

sapdata1 - 20GB

sapdata2 - 22GB

sapdata3 - 11GB

sapdata4 - 6 GB

It is still giving us an error and sapdata2 and sapdata3 are at 100%

Is there a more accurate note that I can't seem to find? Or any advice? We can keep adding space but how much and where is an issue.

Thanks,

Lori