Thread: FATAL 2: invalid checksum in control file

I am trying to restore a database from a machine which has died. The
machine was taken down normally but refused to restart so the data has
been copied elsewhere.

The database is in version 7.2 so I installed 7.2.8, but upon pointing
the postmaster at the relevant data directory I get the error in the
subject line.

The databse was originally on a ReiserFS partition and is now on GPFS,
if that makes any difference.

Any cunning tips on how I can get the database back? I have exhausted
my limited technical knowledge.

(Yes I know a backup would ahve been a good idea, however, lets move
on from where we are , not where we might have liked to have been).

..d

"David Martin" <martin-family@blueyonder.co.uk> writes:
> I am trying to restore a database from a machine which has died. The
> machine was taken down normally but refused to restart so the data has
> been copied elsewhere.

> The database is in version 7.2 so I installed 7.2.8, but upon pointing
> the postmaster at the relevant data directory I get the error in the
> subject line.

Lessee ... 7.2 had pg_controldata and pg_resetxlog, so you have some
hope.  Try the former and see if it can extract anything.  Then try
the latter.  Definitely RTFM on pg_resetxlog before using it.

Also: is the "elsewhere" the same machine architecture as the original
server?  Do not even think about trying to recover x86 files on x86_64,
for example.

            regards, tom lane