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HELP database files are incompatible with server

From: Paulo Jobim <pajobim(at)attglobal(dot)net>
To: pgsql-admin(at)postgresql(dot)org
Subject: HELP database files are incompatible with server
Date: 2004-12-10 04:41:16
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-admin
I did a very small but terrible mistake with my database.
I installed postgresql and DSpace for use in the INSTITUTO ANTONIO 
CARLOS JOBIM, dedicated to the work of this famous Brasilian composer.
I first installed a version 8.0beta5 of postgres but a software advisor 
asked me to use a formal release and I installed version 7.4 and begin 
to work with DSpace. After having submited about 200 items to DSpace a 
researcher at the institute and myself found a bug when brousing the 
archives. the log complained of a variable XactIsoLevel. and I learned 
now it may be related to the JDBC driver.
Now comes the big mistake. I tryed to start the 8beta version of 
postgres in a folder named /usr/local/pgsql2. it did not workand I 
noticed postgres was trying to access the folder /usr/local/pgsqlwith 
the 7.4version installed.after that I renamed pgsql as pgsqlbk and 
renamed pgsql2 as pgsql and started the new version without a problem. 
I noticed DSpace had still the same problem when brousing. (note that 
this version of the database is empty) then I renamed the folders for 
the original names, with pgsql containing the 7.4 database with all the 
records for DSpace. but it never started again. it gives me the 
following error:

FATAL:  database files are incompatible with server
DETAIL:  The database cluster was initialized with PG_CONTROL_VERSION 
74, but the server was compiled with PG_CONTROL_VERSION 72.
HINT:  It looks like you need to initdb.

is there a way to recover the database?
thank you for any help
Paulo Jobim

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