HELP database files are incompatible with server

Hi

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
<bold><bigger><bigger>XactIsoLevel.</bigger></bigger> </bold>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
Hi
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