Re: HELP database files are incompatible with server

Seems you have broken your database files. You could try resetting
PG_VERSION with pg_resetxlog or recompile postgres (I had a similar case
where just recompiling worked). Make sure to take backups of $PGDATA
before you try anything.

Regards,
Bjoern

Paulo Jobim wrote:
> Hi
> I am posting again
> 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