Hi, We are working on a dev cluster which originally was intended to be only 11.2 databases. However requirements changed mid-project (go figure!) and we now have to deploy an 10.2.0.5 database in the same cluster. Does anyone have any experience with this? as I understand it, it's supposed to work. Will the 10g database be able to take advantage of the 11gR2 SCAN? Do you have any experience with corruption on the OCR, ASM, Vote? any info is appreciated. Thank you very much Alan.- -- //www.freelists.org/webpage/oracle-l