I am not sure what your original problem was, but a few things that happen to us all the time in a mixed 11.2 / 11.1 setup .5) yes- update to 11.1.0.7 on rdbms home 1) OCR disk needs to be extended to each ASM disk group, or ASM fails to mount disk groups 2) Oracleasm config files get messed up- check that proper symbolic links in /etc/sysconfig/oracleasm are in place, and scan disks are correct (and not blank). - this was for Red Hat Linux- not sure if it applies to your OS 3) you might need to reregister the listener- and listener should be running out of 11.2 only. (everything is 11.2 except rdbms which is 11.1.0.7). 4) update opatch in 11.1 home to the latest 11.2 supported opatch. -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Peter Hitchman Sent: Saturday, September 18, 2010 12:55 PM To: oracle-l Subject: Re: 11.1 database will not open after upgrading clusterware and ASM to 11.2 Update: After an age OSS have come back to me, to say that we need at least to be on 11.1.0.7.0. No specific details, all I have is that this has happened to someone else and getting to 11.1.0.7 first sorted it. Regards Pete -- //www.freelists.org/webpage/oracle-l -- //www.freelists.org/webpage/oracle-l