Same as I have experienced. I always add local instance name to oratab file so I can keep using oraenv, i.e. : T:/u01/app/oracle/product/11.2.0/dbhome_1:N # added by agent T1:/u01/app/oracle/product/11.2.0/dbhome_1:N # added by me Andre Van: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] Namens Newman, Christopher Verzonden: dinsdag 30 maart 2010 14:51 Aan: oracle-l@xxxxxxxxxxxxx Onderwerp: 11g RAC oraenv question Greetings, We have a database named 'T', with instances T1 and T2. The default entry in the oratab looks something like this: T:/u01/app/oracle/product/11.2.0/dbhome_1:N # line added by Agent . oraenv T, sets the *home* correctly, but does not set the instance. We have to manually export ORACLE_SID=T1. Does anyone have a good way to overcome this? We have some aliases set up and I'm having a heck of a time getting them to work with this current setup. For example, we have an alias that does a less on the alert log, and it's based off the ORACLE_SID: alert='less $ORACLE_BASE/admin/$ORACLE_SID/bdump/alert*log' In our RAC instances, I think it will look something like this, but I'm missing a piece, with INSTANCE_NAME being a variable I'm not sure how to grab (multiple databases/instances on the box). alert='less $ORACLE_BASE/diag/rdbms/$ORACLE_SID/$INSTANCE_NAME /trace/alert*log' Thanks- Chris